{"meta":{"title":"Public API & Data Services Catalog","total":2773,"free_count":2655,"available_count":2664,"note":"Web-grounded, adversarially verified. Status: 'In use'=already in master catalog; 'Available'=net-new. Free-tier limits/prices change — verify before relying.","categories":[{"name":"Accessibility, fonts & developer/code intelligence data","count":27},{"name":"Advertising, Ad-tech & Marketing","count":34},{"name":"Aerospace & Defense","count":29},{"name":"Agent evaluation & observability (open)","count":24},{"name":"Agent orchestration frameworks","count":25},{"name":"Agent tooling & sandboxes","count":30},{"name":"Agriculture & Food science","count":26},{"name":"Air quality & environmental monitoring sensors","count":26},{"name":"Altmetrics & research impact","count":21},{"name":"Anthropology & Archaeology","count":27},{"name":"Autonomous agent projects","count":23},{"name":"Aviation & air traffic","count":27},{"name":"Bibliographic & citation APIs","count":25},{"name":"Biological & Biomedical sciences","count":31},{"name":"Biomedical literature","count":25},{"name":"Browser automation & computer-use agent tooling","count":29},{"name":"Business, Finance & Accounting (academic)","count":25},{"name":"Cannabis & Regulated industries","count":25},{"name":"Chemicals & Materials","count":22},{"name":"Chemistry & Chemical data","count":27},{"name":"Clinical trial registries & protocols","count":24},{"name":"Clinical trial results, IPD & analytics","count":45},{"name":"Clinical trials","count":24},{"name":"Computer & Information sciences","count":30},{"name":"Construction, Architecture & Building","count":26},{"name":"Cultural heritage & digital archives aggregators","count":28},{"name":"Data repositories","count":23},{"name":"Disaster, humanitarian & crisis data","count":28},{"name":"Drug databases & company pipelines","count":43},{"name":"Drug regulatory, approvals, labels & adverse events","count":39},{"name":"Earth, Geology & Atmospheric sciences","count":31},{"name":"Economics & Econometrics","count":28},{"name":"Education & Pedagogy research","count":25},{"name":"Election, legislative & campaign-finance data","count":22},{"name":"Engineering (mechanical/civil/electrical)","count":25},{"name":"Environmental science & Ecology","count":27},{"name":"Fashion, Apparel & Textiles","count":28},{"name":"Forestry, Timber & Land","count":25},{"name":"Gaming & Esports","count":27},{"name":"Genomics & bioinformatics data resources","count":29},{"name":"Geography, GIS & Urban studies","count":38},{"name":"Geospatial basemaps, satellite imagery & EO","count":30},{"name":"Government & scientific data portals","count":30},{"name":"Government procurement, contracts & corporate registries","count":26},{"name":"Grants & funding","count":23},{"name":"History & Digital humanities","count":32},{"name":"Hospitality, Hotels & Restaurants","count":28},{"name":"Identity, standards bodies & registries","count":1},{"name":"Insurance & Actuarial","count":28},{"name":"Law & Legal studies","count":25},{"name":"Linguistics & Languages","count":29},{"name":"LLM gateways & routing","count":28},{"name":"Local model runtimes","count":25},{"name":"Low-code agent & workflow builders","count":25},{"name":"Manufacturing & Supply chain","count":29},{"name":"Maritime & vessel tracking (AIS)","count":23},{"name":"Materials science","count":28},{"name":"Mathematics & Statistics","count":28},{"name":"Medicine & Clinical sciences","count":27},{"name":"Mining, Metals & Commodities","count":27},{"name":"Model & dataset registries","count":24},{"name":"Multimodal generation APIs (image/audio/video/speech)","count":31},{"name":"Neuroscience","count":28},{"name":"Nutrition, food composition & restaurant inspection","count":27},{"name":"Ocean, Marine & Fisheries","count":5},{"name":"Open access discovery","count":25},{"name":"Open agent protocols & interop","count":28},{"name":"Open foundation model families & access","count":27},{"name":"Open model hosting & inference APIs","count":24},{"name":"Patents","count":23},{"name":"Pharmaceuticals & Biotech","count":28},{"name":"Philosophy, Religion & Ethics","count":29},{"name":"Physics & Astronomy","count":29},{"name":"Political science & International relations","count":27},{"name":"Preprint servers","count":25},{"name":"Prompt/agent memory & state stores","count":23},{"name":"Psychology & Cognitive science","count":28},{"name":"Public health & Epidemiology","count":26},{"name":"Public transit & mobility (GTFS)","count":24},{"name":"Renewable energy & Carbon markets","count":23},{"name":"Researcher & org identifiers","count":25},{"name":"Retail, CPG & Consumer goods","count":28},{"name":"Robotics & Industrial automation","count":27},{"name":"Scholarly books & metadata","count":27},{"name":"Semiconductors & Electronics","count":26},{"name":"Sociology & Demography","count":24},{"name":"Sports statistics & live scores","count":25},{"name":"Standards & specifications","count":25},{"name":"Survey microdata & social science archives","count":26},{"name":"Telecom & Connectivity","count":27},{"name":"Theses & dissertations","count":22},{"name":"Tourism, Travel-tech & Recreation","count":29},{"name":"Transportation, Rail, Trucking & Freight","count":31},{"name":"US defense spending, procurement & contracts","count":49},{"name":"US federal government — APIs, open data & services","count":53},{"name":"US legislative, regulatory & judicial data","count":34},{"name":"US military physical assets, force structure & space","count":53},{"name":"Utilities & Water","count":27},{"name":"Vector DBs & RAG infrastructure (open)","count":26},{"name":"Waste, Recycling & Circular economy","count":28},{"name":"Zoos, Aquariums & Wildlife parks","count":22}],"companies":[{"name":"U.S. GSA","count":37},{"name":"NCBI (NIH)","count":33},{"name":"European Union","count":30},{"name":"U.S. USDA","count":30},{"name":"NASA","count":27},{"name":"USGS","count":26},{"name":"EMBL-EBI","count":25},{"name":"openFDA","count":24},{"name":"U.S. EPA","count":21},{"name":"NLM (NIH)","count":20},{"name":"Data.gov","count":17},{"name":"Google","count":17},{"name":"Microsoft","count":17},{"name":"Wikimedia","count":17},{"name":"Crossref","count":16},{"name":"European Commission","count":14},{"name":"NIST","count":14},{"name":"U.S. FDA","count":14},{"name":"arXiv","count":13},{"name":"OpenAlex","count":13},{"name":"Semantic Scholar","count":13},{"name":"U.S. Census Bureau","count":13},{"name":"United Nations","count":13},{"name":"Hugging Face","count":12},{"name":"UK Government","count":12},{"name":"WHO","count":12},{"name":"World Bank","count":12},{"name":"CORE","count":11},{"name":"DataCite","count":11},{"name":"GPO","count":11},{"name":"NIH","count":11},{"name":"ClinicalTrials.gov","count":10},{"name":"Europepmc","count":10},{"name":"USAspending","count":10},{"name":"Arcgis","count":9},{"name":"Copernicus","count":9},{"name":"Government of Canada","count":9},{"name":"NOAA","count":9},{"name":"OpenAIRE","count":9},{"name":"U.S. CDC","count":9},{"name":"FAA","count":8},{"name":"LangChain","count":8},{"name":"NREL","count":8},{"name":"OECD","count":8},{"name":"OpenAI","count":8},{"name":"Courtlistener","count":7},{"name":"FCC","count":7},{"name":"Kaggle","count":7},{"name":"Lens.org","count":7},{"name":"Loc","count":7},{"name":"OpenStreetMap","count":7},{"name":"Sipri","count":7},{"name":"Unpaywall","count":7},{"name":"CelesTrak","count":6},{"name":"Cloudflare","count":6},{"name":"Dimensions","count":6},{"name":"En","count":6},{"name":"FRED (St. Louis Fed)","count":6},{"name":"Go","count":6},{"name":"Opencitations","count":6},{"name":"Osf","count":6},{"name":"U.S. DOT","count":6},{"name":"U.S. EIA","count":6},{"name":"Zenodo (CERN)","count":6},{"name":"Dataverse","count":5},{"name":"DOAJ","count":5},{"name":"Elsevier","count":5},{"name":"Europeana","count":5},{"name":"Fec","count":5},{"name":"Federal Register","count":5},{"name":"Geonames","count":5},{"name":"Groq","count":5},{"name":"Library of Congress","count":5},{"name":"NIH RePORTER","count":5},{"name":"Nvidia","count":5},{"name":"NWS (NOAA)","count":5},{"name":"Openskynetwork","count":5},{"name":"Opentargets","count":5},{"name":"Rapidapi","count":5},{"name":"RCSB PDB","count":5},{"name":"Readthedocs","count":5},{"name":"Together AI","count":5},{"name":"U.S. Dept of Education","count":5},{"name":"U.S. SEC","count":5},{"name":"U.S. Treasury","count":5},{"name":"USPTO","count":5},{"name":"Anzctr","count":4},{"name":"Api ninjas","count":4},{"name":"Archive","count":4},{"name":"Arize","count":4},{"name":"Aviationstack","count":4},{"name":"Base search","count":4},{"name":"bioRxiv","count":4},{"name":"Clinicaltrialsregister","count":4},{"name":"Crystallography","count":4},{"name":"Deepinfra","count":4},{"name":"Drugbank","count":4},{"name":"Edamam","count":4},{"name":"Ensembl","count":4},{"name":"Euclinicaltrials","count":4},{"name":"FAO","count":4},{"name":"Figshare","count":4},{"name":"Fireworks AI","count":4},{"name":"GBIF","count":4},{"name":"Geoapify","count":4},{"name":"Harvard","count":4},{"name":"Hathitrust","count":4},{"name":"Helicone","count":4},{"name":"Isrctn","count":4},{"name":"Kegg","count":4},{"name":"Makegov","count":4},{"name":"Mapbox","count":4},{"name":"Materialsproject","count":4},{"name":"Meta","count":4},{"name":"Modelcontextprotocol","count":4},{"name":"Nationalmap","count":4},{"name":"Nexar","count":4},{"name":"Nps","count":4},{"name":"Oclc","count":4},{"name":"Ollama","count":4},{"name":"Open meteo","count":4},{"name":"Opencorporates","count":4},{"name":"Openfoodfacts","count":4},{"name":"OpenRouter","count":4},{"name":"Openstates","count":4},{"name":"Optimade","count":4},{"name":"ORCID","count":4},{"name":"Protectedplanet","count":4},{"name":"Pydantic","count":4},{"name":"Readme","count":4},{"name":"Replicate","count":4},{"name":"Ropensci","count":4},{"name":"Serpapi","count":4},{"name":"Trialstracker","count":4},{"name":"U.S. BLS","count":4},{"name":"Unitedstates","count":4},{"name":"Vercel","count":4},{"name":"Wipo","count":4},{"name":"Aerodatabox","count":3},{"name":"Agentops","count":3},{"name":"Agntcy","count":3},{"name":"Airnowapi","count":3},{"name":"Amadeus","count":3},{"name":"Aqicn","count":3},{"name":"AWS","count":3},{"name":"Bindingdb","count":3},{"name":"BIS","count":3},{"name":"Brain map","count":3},{"name":"Browserbase","count":3},{"name":"Ca","count":3},{"name":"Caltech","count":3},{"name":"Citeline","count":3},{"name":"Cityofnewyork","count":3},{"name":"Cms","count":3},{"name":"CrewAI","count":3},{"name":"Ctti clinicaltrials","count":3},{"name":"Dgidb","count":3},{"name":"Digikey","count":3},{"name":"Dp","count":3},{"name":"E2b","count":3},{"name":"Fatcat","count":3},{"name":"Fema","count":3},{"name":"Followthemoney","count":3},{"name":"Foursquare","count":3},{"name":"Getty","count":3},{"name":"Gitbook","count":3},{"name":"Google Cloud","count":3},{"name":"Gridstatus","count":3},{"name":"Harvardartmuseums","count":3},{"name":"HERE","count":3},{"name":"House","count":3},{"name":"IETF","count":3},{"name":"IMF","count":3},{"name":"Isric","count":3},{"name":"ITU","count":3},{"name":"Ivanstanojevic","count":3},{"name":"Jina","count":3},{"name":"Legiscan","count":3},{"name":"Marinetraffic","count":3},{"name":"Mit","count":3},{"name":"Mobilitydatabase","count":3},{"name":"Modal","count":3},{"name":"Mouser","count":3},{"name":"Mychem","count":3},{"name":"Mygene","count":3},{"name":"Naic","count":3},{"name":"Nasdaq","count":3},{"name":"Nla","count":3},{"name":"Nominatim","count":3},{"name":"Novita","count":3},{"name":"Nutritionix","count":3},{"name":"Openaq","count":3},{"name":"Openei","count":3},{"name":"Openrouteservice","count":3},{"name":"Opentopography","count":3},{"name":"Oqmd","count":3},{"name":"Osd","count":3},{"name":"Ourairports","count":3},{"name":"Owid","count":3},{"name":"PatentsView","count":3},{"name":"Pewresearch","count":3},{"name":"Project osrm","count":3},{"name":"Propublica","count":3},{"name":"Reactome","count":3},{"name":"Redis","count":3},{"name":"Rfhb","count":3},{"name":"Schema.org","count":3},{"name":"Scite","count":3},{"name":"Senate","count":3},{"name":"Sherpa","count":3},{"name":"Si","count":3},{"name":"Spoonacular","count":3},{"name":"Stanford","count":3},{"name":"Transit","count":3},{"name":"UniProt","count":3},{"name":"W3C","count":3},{"name":"Yale","count":3},{"name":"Yelp","count":3},{"name":"511","count":2},{"name":"Abstractapi","count":2},{"name":"Ac","count":2},{"name":"Acleddata","count":2},{"name":"Adsbexchange","count":2},{"name":"Aflow","count":2},{"name":"Airportdb","count":2},{"name":"Aishub","count":2},{"name":"Aisstream","count":2},{"name":"Alphavantage","count":2},{"name":"Amazon","count":2},{"name":"Apify","count":2},{"name":"Archives ouvertes","count":2},{"name":"Archivesportaleurope","count":2},{"name":"BabyAGI","count":2},{"name":"Barcodelookup","count":2},{"name":"Bgci","count":2},{"name":"Bgee","count":2},{"name":"Biopharmcatalyst","count":2},{"name":"Booking","count":2},{"name":"Braintrust","count":2},{"name":"Browserless","count":2},{"name":"Buildingtransparency","count":2},{"name":"Carbonintensity","count":2},{"name":"Cas","count":2},{"name":"Case","count":2},{"name":"Cdisc","count":2},{"name":"Cerebras","count":2},{"name":"Claude","count":2},{"name":"Clinpgx","count":2},{"name":"Comet","count":2},{"name":"Commodities api","count":2},{"name":"Cooperhewitt","count":2},{"name":"Cornell","count":2},{"name":"Crates","count":2},{"name":"Datadryad","count":2},{"name":"Datamuse","count":2},{"name":"Daytona","count":2},{"name":"Dblp","count":2},{"name":"Defense","count":2},{"name":"Deps","count":2},{"name":"Deutsche digitale bibliothek","count":2},{"name":"Dhsprogram","count":2},{"name":"Digitalnz","count":2},{"name":"Dla","count":2},{"name":"Dnb","count":2},{"name":"Doabooks","count":2},{"name":"Doi","count":2},{"name":"Dpma","count":2},{"name":"Drks","count":2},{"name":"Drugcentral","count":2},{"name":"Dtu","count":2},{"name":"Ecfr","count":2},{"name":"Ecosyste","count":2},{"name":"Electricitymaps","count":2},{"name":"Embl","count":2},{"name":"Entsoe","count":2},{"name":"EPO","count":2},{"name":"Fawazahmed0","count":2},{"name":"Fedspendingtransparency","count":2},{"name":"Fhi","count":2},{"name":"Firecrawl","count":2},{"name":"Flightaware","count":2},{"name":"Fpds","count":2},{"name":"Freightos","count":2},{"name":"GAO","count":2},{"name":"Gdeltproject","count":2},{"name":"Gesis","count":2},{"name":"Glama","count":2},{"name":"Gleif","count":2},{"name":"Globalfishingwatch","count":2},{"name":"Globalforestwatch","count":2},{"name":"Go upc","count":2},{"name":"Goflightlabs","count":2},{"name":"Gouv","count":2},{"name":"Govtrack","count":2},{"name":"Grants.gov","count":2},{"name":"Graphhopper","count":2},{"name":"Gutendex","count":2},{"name":"Healthdata","count":2},{"name":"Hhs","count":2},{"name":"Humdata","count":2},{"name":"Hyperbolic","count":2},{"name":"Hyperbrowser","count":2},{"name":"Iana","count":2},{"name":"Icao","count":2},{"name":"IEEE","count":2},{"name":"Ilo","count":2},{"name":"Ipums","count":2},{"name":"IRS","count":2},{"name":"Isni","count":2},{"name":"ISO","count":2},{"name":"IUCN","count":2},{"name":"Langfuse","count":2},{"name":"Leolabs","count":2},{"name":"Libraries","count":2},{"name":"Litellm","count":2},{"name":"LlamaIndex","count":2},{"name":"Maptiler","count":2},{"name":"Marinecadastre","count":2},{"name":"Marinespecies","count":2},{"name":"Matweb","count":2},{"name":"Medlineplus","count":2},{"name":"Mistral AI","count":2},{"name":"Mlflow","count":2},{"name":"Mta","count":2},{"name":"Myvariant","count":2},{"name":"N2yo","count":2},{"name":"Navy","count":2},{"name":"Nebius","count":2},{"name":"Neuroquery","count":2},{"name":"Neurovault","count":2},{"name":"Nga","count":2},{"name":"Nic","count":2},{"name":"Nmslib","count":2},{"name":"Nomisma","count":2},{"name":"Norc","count":2},{"name":"Npm","count":2},{"name":"Nsides","count":2},{"name":"Open elevation","count":2},{"name":"Open notify","count":2},{"name":"Open reaction database","count":2},{"name":"Opencellid","count":2},{"name":"Opencontext","count":2},{"name":"Openepi","count":2},{"name":"Openflights","count":2},{"name":"Openicpsr","count":2},{"name":"Openlibrary","count":2},{"name":"Openneuro","count":2},{"name":"Opensanctions","count":2},{"name":"Openweathermap","count":2},{"name":"Org","count":2},{"name":"Osmfoundation","count":2},{"name":"OSTI (DOE)","count":2},{"name":"Overturemaps","count":2},{"name":"Oyez","count":2},{"name":"Perio","count":2},{"name":"Philpapers","count":2},{"name":"Physionet","count":2},{"name":"Pinecone","count":2},{"name":"Pipedream","count":2},{"name":"Portkey","count":2},{"name":"Princeton","count":2},{"name":"Purpleair","count":2},{"name":"Pypi","count":2},{"name":"Recreation","count":2},{"name":"Rijksmuseum","count":2},{"name":"Riotgames","count":2},{"name":"RobotWebTools","count":2},{"name":"Ros","count":2},{"name":"Rsc","count":2},{"name":"SAM.gov","count":2},{"name":"Sambanova","count":2},{"name":"Sbir","count":2},{"name":"Scraperapi","count":2},{"name":"Scrapingbee","count":2},{"name":"Scrapybara","count":2},{"name":"Serper","count":2},{"name":"Sfgov","count":2},{"name":"Shipsgo","count":2},{"name":"Shopify","count":2},{"name":"Slingshot","count":2},{"name":"Smithery","count":2},{"name":"Snapeda","count":2},{"name":"Socrata","count":2},{"name":"Softwareheritage","count":2},{"name":"Sourcegraph","count":2},{"name":"Space-Track","count":2},{"name":"Spdx","count":2},{"name":"Springer","count":2},{"name":"Springernature","count":2},{"name":"Stadiamaps","count":2},{"name":"Steel","count":2},{"name":"Stoa","count":2},{"name":"String db","count":2},{"name":"Supremecourt","count":2},{"name":"Thearda","count":2},{"name":"Themealdb","count":2},{"name":"Thespacedevs","count":2},{"name":"Tomtom","count":2},{"name":"Traceloop","count":2},{"name":"Transceleratebiopharmainc","count":2},{"name":"Transportation","count":2},{"name":"Travelpayouts","count":2},{"name":"Ttb","count":2},{"name":"Twelvedata","count":2},{"name":"Twilio","count":2},{"name":"U.S. BEA","count":2},{"name":"Uci","count":2},{"name":"Ucsc","count":2},{"name":"Unesco","count":2},{"name":"Unhcr","count":2},{"name":"Upcitemdb","count":2},{"name":"Upstash","count":2},{"name":"Uscourts","count":2},{"name":"Usitc","count":2},{"name":"Uu","count":2},{"name":"Vizionapi","count":2},{"name":"Wandb","count":2},{"name":"Waterqualitydata","count":2},{"name":"Watttime","count":2},{"name":"Whgazetteer","count":2},{"name":"Who umc","count":2},{"name":"Whs","count":2},{"name":"Wmata","count":2},{"name":"Worldvaluessurvey","count":2},{"name":"Zapier","count":2},{"name":"2050 materials","count":1},{"name":"2dmatpedia","count":1},{"name":"A2a protocol","count":1},{"name":"Abes","count":1},{"name":"Abiosgaming","count":1},{"name":"Acaps","count":1},{"name":"Accuristech","count":1},{"name":"Activecampaign","count":1},{"name":"Activepieces","count":1},{"name":"Adafruit","count":1},{"name":"Adlnet","count":1},{"name":"Adrreports","count":1},{"name":"Adsb","count":1},{"name":"Aflowlib","count":1},{"name":"Afrobarometer","count":1},{"name":"Ag2","count":1},{"name":"Agent network protocol","count":1},{"name":"Agentcommunicationprotocol","count":1},{"name":"Agora protocol","count":1},{"name":"Agpt","count":1},{"name":"Ahrefs","count":1},{"name":"Aimlapi","count":1},{"name":"Airdna","count":1},{"name":"Airgradient","count":1},{"name":"Airlabs","count":1},{"name":"Airroi","count":1},{"name":"AISViz","count":1},{"name":"Aitp","count":1},{"name":"Aladhan","count":1},{"name":"Alibabacloud","count":1},{"name":"All Hands AI","count":1},{"name":"Alldatasheet","count":1},{"name":"Allenai","count":1},{"name":"Alleninstitute","count":1},{"name":"Alliancegenome","count":1},{"name":"Alquran","count":1},{"name":"Altmetric","count":1},{"name":"Ambeedata","count":1},{"name":"Ambest","count":1},{"name":"Amtraker","count":1},{"name":"Anaconda","count":1},{"name":"Anchorbrowser","count":1},{"name":"Anses","count":1},{"name":"Anyscale","count":1},{"name":"Apache","count":1},{"name":"Api","count":1},{"name":"Api sports","count":1},{"name":"Api4","count":1},{"name":"Apis","count":1},{"name":"Archaeologydataservice","count":1},{"name":"Archives","count":1},{"name":"Ardc","count":1},{"name":"Ariadne research infrastructure","count":1},{"name":"Army","count":1},{"name":"Ars grin","count":1},{"name":"Artic","count":1},{"name":"Asg017","count":1},{"name":"ASHP Software","count":1},{"name":"Assemblyai","count":1},{"name":"Astrometry","count":1},{"name":"Asyncapi","count":1},{"name":"Atlanticcouncil","count":1},{"name":"Atmo france","count":1},{"name":"Austender","count":1},{"name":"Australian Bureau of Statistics","count":1},{"name":"Autodesk","count":1},{"name":"AutoGPT","count":1},{"name":"Aviation edge","count":1},{"name":"Aviationapi","count":1},{"name":"Avwx","count":1},{"name":"Aza","count":1},{"name":"Azure","count":1},{"name":"Bailii","count":1},{"name":"Balldontlie","count":1},{"name":"Ballotpedia","count":1},{"name":"Ballotready","count":1},{"name":"Barcodespider","count":1},{"name":"Barentswatch","count":1},{"name":"Bart","count":1},{"name":"Basel","count":1},{"name":"Baseten","count":1},{"name":"Batteryarchive","count":1},{"name":"Batterynetwork","count":1},{"name":"Battle","count":1},{"name":"Bdsa","count":1},{"name":"Beacondb","count":1},{"name":"Benhoneywill","count":1},{"name":"Bentoml","count":1},{"name":"Berkeley","count":1},{"name":"Bestbuy","count":1},{"name":"Bfarm","count":1},{"name":"Bfl","count":1},{"name":"Bgs","count":1},{"name":"Bible api","count":1},{"name":"Bindable","count":1},{"name":"Biotrack","count":1},{"name":"Bitly","count":1},{"name":"Bl","count":1},{"name":"Blaxel","count":1},{"name":"Blm","count":1},{"name":"Bnf","count":1},{"name":"Boeing","count":1},{"name":"Boldmetrics","count":1},{"name":"Bolls","count":1},{"name":"Borealisdata","count":1},{"name":"Bossdb","count":1},{"name":"Bostondynamics","count":1},{"name":"Botpress","count":1},{"name":"Brainimagelibrary","count":1},{"name":"Brainlife","count":1},{"name":"Brave","count":1},{"name":"Brevo","count":1},{"name":"Britishmuseum","count":1},{"name":"Broadinstitute","count":1},{"name":"Brocade","count":1},{"name":"Browser use","count":1},{"name":"Browserstack","count":1},{"name":"Bts","count":1},{"name":"Budibase","count":1},{"name":"Buffer","count":1},{"name":"Buildzoomdata","count":1},{"name":"Bunny","count":1},{"name":"Business","count":1},{"name":"Buycott","count":1},{"name":"Cadenas","count":1},{"name":"Caiso","count":1},{"name":"Calorieninjas","count":1},{"name":"Cam","count":1},{"name":"Camel ai","count":1},{"name":"CAMEL-AI","count":1},{"name":"Canadianarchaeology","count":1},{"name":"Cancer","count":1},{"name":"Cancerimagingarchive","count":1},{"name":"Candid","count":1},{"name":"Canlii","count":1},{"name":"Cannabiz","count":1},{"name":"Carboninterface","count":1},{"name":"Carbonplan","count":1},{"name":"Cartesia","count":1},{"name":"CERN","count":1},{"name":"Cerner","count":1},{"name":"Cessda","count":1},{"name":"Chainlit","count":1},{"name":"Cheapshark","count":1},{"name":"Checklistbank","count":1},{"name":"Checkwxapi","count":1},{"name":"Chemrxiv","count":1},{"name":"Cicerodata","count":1},{"name":"Cirium","count":1},{"name":"CISA","count":1},{"name":"Citrination","count":1},{"name":"Cityofchicago","count":1},{"name":"Civitai","count":1},{"name":"Cjhutto","count":1},{"name":"Ckan","count":1},{"name":"Clarity","count":1},{"name":"Clarivate","count":1},{"name":"Clearlydefined","count":1},{"name":"Clevelandart","count":1},{"name":"Climatetrace","count":1},{"name":"Climatiq","count":1},{"name":"Clinicalgenome","count":1},{"name":"Clinicalstudydatarequest","count":1},{"name":"Cloudsds","count":1},{"name":"Cloverly","count":1},{"name":"CMSgov","count":1},{"name":"Cmu","count":1},{"name":"Cmu delphi","count":1},{"name":"Coar repositories","count":1},{"name":"Cochranelibrary","count":1},{"name":"Codecogs","count":1},{"name":"Codesandbox","count":1},{"name":"Codesota","count":1},{"name":"Coe","count":1},{"name":"Cognitiveatlas","count":1},{"name":"Cohere","count":1},{"name":"Collegefootballdata","count":1},{"name":"Colorado","count":1},{"name":"Colourlovers","count":1},{"name":"Comet initiative","count":1},{"name":"Commoditypriceapi","count":1},{"name":"Commonsense","count":1},{"name":"Commonstandardsproject","count":1},{"name":"Componentsearchengine","count":1},{"name":"Composio","count":1},{"name":"Compras","count":1},{"name":"Compulife","count":1},{"name":"Conceptnet","count":1},{"name":"Confident ai","count":1},{"name":"Confidentlims","count":1},{"name":"Constantcontact","count":1},{"name":"Constructionmonitor","count":1},{"name":"Containers","count":1},{"name":"Coolprop","count":1},{"name":"Coral Protocol","count":1},{"name":"Correlatesofwar","count":1},{"name":"Cortellis","count":1},{"name":"Cpicpgx","count":1},{"name":"Cricapi","count":1},{"name":"Crunchbase","count":1},{"name":"CSISdefense","count":1},{"name":"Customer","count":1},{"name":"Cvlibs","count":1},{"name":"D place","count":1},{"name":"Dainst","count":1},{"name":"Dandiarchive","count":1},{"name":"Dart europe","count":1},{"name":"Dat","count":1},{"name":"Data","count":1},{"name":"Dataforseo","count":1},{"name":"Datahub","count":1},{"name":"Datakick","count":1},{"name":"Datalastic","count":1},{"name":"Dataoneorg","count":1},{"name":"Datasets","count":1},{"name":"Datasheetarchive","count":1},{"name":"Datasheets","count":1},{"name":"Dc","count":1},{"name":"Deepeval","count":1},{"name":"Deepgram","count":1},{"name":"Deepseek","count":1},{"name":"deepset","count":1},{"name":"Desire2learn","count":1},{"name":"Deutschebahn","count":1},{"name":"Developer tripadvisor","count":1},{"name":"Dherincx92","count":1},{"name":"Dictionaryapi","count":1},{"name":"Dify","count":1},{"name":"Digitraffic","count":1},{"name":"Disease","count":1},{"name":"Disgenet","count":1},{"name":"Diva portal","count":1},{"name":"Dma","count":1},{"name":"Docker","count":1},{"name":"Docking","count":1},{"name":"Dodsbirsttr","count":1},{"name":"Drewry","count":1},{"name":"Dsca","count":1},{"name":"Dtic","count":1},{"name":"Dtn","count":1},{"name":"Dummyjson","count":1},{"name":"Ean search","count":1},{"name":"Earth911","count":1},{"name":"Eartharxiv","count":1},{"name":"Easypronunciation","count":1},{"name":"Easysize","count":1},{"name":"Eazaconservation","count":1},{"name":"Ebay","count":1},{"name":"Ebrains","count":1},{"name":"Eclipse","count":1},{"name":"Econdb","count":1},{"name":"Edenai","count":1},{"name":"Edu","count":1},{"name":"Eigent ai","count":1},{"name":"Elastic","count":1},{"name":"Electionstudies","count":1},{"name":"Element14","count":1},{"name":"Element84","count":1},{"name":"Elevenlabs","count":1},{"name":"Elexon","count":1},{"name":"Emdat","count":1},{"name":"Endoflife","count":1},{"name":"Entur","count":1},{"name":"Eodhd","count":1},{"name":"Eol","count":1},{"name":"Epic","count":1},{"name":"Eppo","count":1},{"name":"Eprints","count":1},{"name":"Ercot","count":1},{"name":"ESA","count":1},{"name":"Esa worldcover","count":1},{"name":"Eso","count":1},{"name":"Espacenet","count":1},{"name":"Espeak ng","count":1},{"name":"Espn","count":1},{"name":"Esv","count":1},{"name":"Etsy","count":1},{"name":"Eudat","count":1},{"name":"Eurocontrol","count":1},{"name":"European Central Bank","count":1},{"name":"Everstream","count":1},{"name":"Everycrsreport","count":1},{"name":"Evidentlyai","count":1},{"name":"Exa","count":1},{"name":"Exeter","count":1},{"name":"Faa swim","count":1},{"name":"Faceit","count":1},{"name":"Fairsharing","count":1},{"name":"Fakestoreapi","count":1},{"name":"Fal","count":1},{"name":"Fara","count":1},{"name":"Fashionpedia","count":1},{"name":"Fashn","count":1},{"name":"Fatsecret","count":1},{"name":"FDIC","count":1},{"name":"Featherless","count":1},{"name":"Federal Aviation Administration","count":1},{"name":"Fews","count":1},{"name":"Ffiec","count":1},{"name":"Fhir","count":1},{"name":"Financialmodelingprep","count":1},{"name":"Findchips","count":1},{"name":"Finds","count":1},{"name":"Findstat","count":1},{"name":"Finnhub","count":1},{"name":"First","count":1},{"name":"Fishdatabase","count":1},{"name":"Fitanalytics","count":1},{"name":"Fivethirtyeight","count":1},{"name":"Flightradar24","count":1},{"name":"Flowiseai","count":1},{"name":"Flywire","count":1},{"name":"Fontawesome","count":1},{"name":"Fontsource","count":1},{"name":"Fooddata","count":1},{"name":"Foodsafety","count":1},{"name":"Football data","count":1},{"name":"Formant","count":1},{"name":"Forvo","count":1},{"name":"FoundationAgents","count":1},{"name":"Foxglove","count":1},{"name":"Freedomhouse","count":1},{"name":"Freetogame","count":1},{"name":"Fws","count":1},{"name":"Gadm","count":1},{"name":"Gamerpower","count":1},{"name":"Gbfs","count":1},{"name":"Gdacs","count":1},{"name":"Genenames","count":1},{"name":"Geoboundaries","count":1},{"name":"Geocode","count":1},{"name":"Getbible","count":1},{"name":"Getyourguide","count":1},{"name":"Getzep","count":1},{"name":"Gfz","count":1},{"name":"Gfz potsdam","count":1},{"name":"Ggp i","count":1},{"name":"Giantbomb","count":1},{"name":"Gitlab","count":1},{"name":"Gladia","count":1},{"name":"Globaldata","count":1},{"name":"Globalsolaratlas","count":1},{"name":"Globalwindatlas","count":1},{"name":"Glottolog","count":1},{"name":"Gmicloud","count":1},{"name":"Gmu","count":1},{"name":"Gold feed","count":1},{"name":"Goldapi","count":1},{"name":"Goldpricez","count":1},{"name":"Goodonyou","count":1},{"name":"Google deepmind","count":1},{"name":"Govtribe","count":1},{"name":"Govwin","count":1},{"name":"Gpt4all","count":1},{"name":"Gpustack","count":1},{"name":"Gpxz","count":1},{"name":"Graphlit","count":1},{"name":"Greenbuttondata","count":1},{"name":"Grid","count":1},{"name":"Gs1","count":1},{"name":"Gs1us","count":1},{"name":"Gtinsearch","count":1},{"name":"Guidetopharmacology","count":1},{"name":"Gumloop","count":1},{"name":"Gwosc","count":1},{"name":"Haloapi","count":1},{"name":"Headset","count":1},{"name":"Healthmap","count":1},{"name":"Heavens above","count":1},{"name":"Helloao","count":1},{"name":"Henrikdev","count":1},{"name":"Heuritech","count":1},{"name":"Hexdb","count":1},{"name":"Hexure","count":1},{"name":"Highergov","count":1},{"name":"Highlightly","count":1},{"name":"Hitran","count":1},{"name":"Hlr lookups","count":1},{"name":"Hmdb","count":1},{"name":"Hotelbeds","count":1},{"name":"Hpc","count":1},{"name":"Hubspot","count":1},{"name":"Humanconnectome","count":1},{"name":"Hungermapdata","count":1},{"name":"Hunter","count":1},{"name":"Hypixel","count":1},{"name":"Iastate","count":1},{"name":"Iatistandard","count":1},{"name":"Iccsafe","count":1},{"name":"Iconify","count":1},{"name":"Icpsr","count":1},{"name":"Ideogram","count":1},{"name":"Idrblab","count":1},{"name":"Ificlaims","count":1},{"name":"Ifrc","count":1},{"name":"Igdb","count":1},{"name":"Ihsn","count":1},{"name":"Iiif","count":1},{"name":"Iiss","count":1},{"name":"Imsglobal","count":1},{"name":"iNaturalist","count":1},{"name":"Incf","count":1},{"name":"Inciteful","count":1},{"name":"Indiankanoon","count":1},{"name":"Inductiveautomation","count":1},{"name":"Inference","count":1},{"name":"Inorbit","count":1},{"name":"Inphoproject","count":1},{"name":"Inspirehep","count":1},{"name":"Ipcinfo","count":1},{"name":"Ipinfo","count":1},{"name":"Ipqualityscore","count":1},{"name":"Iprally","count":1},{"name":"Iqair","count":1},{"name":"Irct","count":1},{"name":"Iris","count":1},{"name":"Isbndb","count":1},{"name":"Isportsapi","count":1},{"name":"Iterable","count":1},{"name":"Jan","count":1},{"name":"Janelia","count":1},{"name":"Janes","count":1},{"name":"Janhq","count":1},{"name":"Jarvis materials design","count":1},{"name":"Jlcpcb","count":1},{"name":"Jolpica","count":1},{"name":"Kernel","count":1},{"name":"Khan","count":1},{"name":"Kingjulio8238","count":1},{"name":"Klaviyo","count":1},{"name":"Kobotoolbox","count":1},{"name":"Konghq","count":1},{"name":"Kpler","count":1},{"name":"Kroger","count":1},{"name":"Kystdatahuset","count":1},{"name":"Ladderlife","count":1},{"name":"Lambda","count":1},{"name":"Lambdatest","count":1},{"name":"Laminar","count":1},{"name":"Laminardata","count":1},{"name":"Lancedb","count":1},{"name":"Langdb","count":1},{"name":"Langflow","count":1},{"name":"Langtrace","count":1},{"name":"Latinobarometro","count":1},{"name":"Lbl","count":1},{"name":"Lcsc","count":1},{"name":"Learningregistry","count":1},{"name":"Lemonade","count":1},{"name":"Lemonade server","count":1},{"name":"Lemonfox","count":1},{"name":"Leonardo","count":1},{"name":"Letta","count":1},{"name":"Letta ai","count":1},{"name":"Lexvo","count":1},{"name":"Libretranslate","count":1},{"name":"Lightpanda io","count":1},{"name":"Lindy","count":1},{"name":"Linkup","count":1},{"name":"Liquipedia","count":1},{"name":"Lisdatacenter","count":1},{"name":"Liteapi","count":1},{"name":"Literalai","count":1},{"name":"Live score api","count":1},{"name":"llama.cpp","count":1},{"name":"Llmgateway","count":1},{"name":"Llmstxt","count":1},{"name":"Lm sys","count":1},{"name":"Lmfdb","count":1},{"name":"Lmstudio","count":1},{"name":"Lobid","count":1},{"name":"Localai","count":1},{"name":"Locationiq","count":1},{"name":"LostRuins","count":1},{"name":"LukePeavey","count":1},{"name":"Lumalabs","count":1},{"name":"Lunary","count":1},{"name":"Lykdat","count":1},{"name":"Macrostrat","count":1},{"name":"Madroidmaq","count":1},{"name":"Mailchimp","count":1},{"name":"Mailgun","count":1},{"name":"Makcorps","count":1},{"name":"Make","count":1},{"name":"Marineregions","count":1},{"name":"Marketplace","count":1},{"name":"Marketstack","count":1},{"name":"Marqo","count":1},{"name":"Massbank","count":1},{"name":"Masscannabiscontrol","count":1},{"name":"Materialscloud","count":1},{"name":"Materialsdatafacility","count":1},{"name":"Math","count":1},{"name":"Mathjs","count":1},{"name":"Mathpix","count":1},{"name":"Mathworks","count":1},{"name":"Matmatch","count":1},{"name":"Maximhq","count":1},{"name":"Mbta","count":1},{"name":"Mcc mnc lookup","count":1},{"name":"Mcmaster","count":1},{"name":"Mcp","count":1},{"name":"Mcw","count":1},{"name":"Measurementlab","count":1},{"name":"Meddra","count":1},{"name":"Medicaid","count":1},{"name":"medRxiv","count":1},{"name":"Meersens","count":1},{"name":"Megallm","count":1},{"name":"Mem0","count":1},{"name":"Memobase","count":1},{"name":"Mendeley","count":1},{"name":"Metalpriceapi","count":1},{"name":"Metals","count":1},{"name":"Metals api","count":1},{"name":"Metmuseum","count":1},{"name":"Metrc","count":1},{"name":"Migrationdataportal","count":1},{"name":"Milvus","count":1},{"name":"Mindat","count":1},{"name":"Minecraft","count":1},{"name":"Minorplanetcenter","count":1},{"name":"MITRE","count":1},{"name":"Ml explore","count":1},{"name":"Mlb","count":1},{"name":"MobilityData","count":1},{"name":"Mobygames","count":1},{"name":"Modeldb","count":1},{"name":"Modelscope","count":1},{"name":"Modernmt","count":1},{"name":"Monarchinitiative","count":1},{"name":"Moodle","count":1},{"name":"Moralmachine","count":1},{"name":"Mortality","count":1},{"name":"Mostlygeek","count":1},{"name":"Mousemine","count":1},{"name":"Moz","count":1},{"name":"Mozilla ai","count":1},{"name":"Mpds","count":1},{"name":"Mrlc","count":1},{"name":"Msha","count":1},{"name":"Mtconnect","count":1},{"name":"Multion","count":1},{"name":"Myscale","count":1},{"name":"Myshiptracking","count":1},{"name":"Mysportsfeeds","count":1},{"name":"Mytomorrows","count":1},{"name":"N8n","count":1},{"name":"Nasa pds","count":1},{"name":"NationalGalleryOfArt","count":1},{"name":"Nationalrail","count":1},{"name":"Nato","count":1},{"name":"Naturalearthdata","count":1},{"name":"Naturalproducts","count":1},{"name":"Navitia","count":1},{"name":"Nba","count":1},{"name":"Ncats","count":1},{"name":"Ncbi nlp","count":1},{"name":"Ncua","count":1},{"name":"Ndltd","count":1},{"name":"Nemar","count":1},{"name":"Neon","count":1},{"name":"Neonscience","count":1},{"name":"Neotomadb","count":1},{"name":"Networkrail","count":1},{"name":"Neuml","count":1},{"name":"Neuroelectro","count":1},{"name":"Neuromorpho","count":1},{"name":"Neurostuff","count":1},{"name":"Neurosynth","count":1},{"name":"Neutrinoapi","count":1},{"name":"Newyorkfed","count":1},{"name":"Nextstrain","count":1},{"name":"Nexusrecycle","count":1},{"name":"Nflverse","count":1},{"name":"Ngrok","count":1},{"name":"Nhle","count":1},{"name":"Nhs","count":1},{"name":"Nitrc","count":1},{"name":"Nlpl","count":1},{"name":"Nlweb ai","count":1},{"name":"Nomad lab","count":1},{"name":"Nomics","count":1},{"name":"Northflank","count":1},{"name":"Notte","count":1},{"name":"NSF","count":1},{"name":"Nsw","count":1},{"name":"Numbersapi","count":1},{"name":"Numlookupapi","count":1},{"name":"Numverify","count":1},{"name":"Nuscenes","count":1},{"name":"Nv","count":1},{"name":"Ny","count":1},{"name":"Oag","count":1},{"name":"OAI","count":1},{"name":"Oapen","count":1},{"name":"Oasislmf","count":1},{"name":"Oatd","count":1},{"name":"Occrp","count":1},{"name":"Octopus","count":1},{"name":"Oeis","count":1},{"name":"Oemsecrets","count":1},{"name":"Ofcom","count":1},{"name":"Ohdsi","count":1},{"name":"Oilpriceapi","count":1},{"name":"Olo","count":1},{"name":"Omwn","count":1},{"name":"Oobabooga","count":1},{"name":"Open62541","count":1},{"name":"Openaddresses","count":1},{"name":"Openaerialmap","count":1},{"name":"Openapis","count":1},{"name":"Openarchives","count":1},{"name":"Openautomationsoftware","count":1},{"name":"Openbeautyfacts","count":1},{"name":"Openbookpublishers","count":1},{"name":"Openbrewerydb","count":1},{"name":"Opencagedata","count":1},{"name":"Opencatalystproject","count":1},{"name":"Openchargemap","count":1},{"name":"Opendata","count":1},{"name":"Opendata stuttgart","count":1},{"name":"Opendissertations","count":1},{"name":"Opendota","count":1},{"name":"Openedx","count":1},{"name":"Openelections","count":1},{"name":"Openeo","count":1},{"name":"Openfarmcc","count":1},{"name":"Openfmri","count":1},{"name":"Openhands","count":1},{"name":"Openinframap","count":1},{"name":"Openkim","count":1},{"name":"Openlandmap","count":1},{"name":"Openligadb","count":1},{"name":"Openlit","count":1},{"name":"Openlittermap","count":1},{"name":"Openmaterialsdb","count":1},{"name":"Openml","count":1},{"name":"Openownership","count":1},{"name":"Openproductsfacts","count":1},{"name":"Openpsychometrics","count":1},{"name":"Openrepair","count":1},{"name":"Opensafely","count":1},{"name":"Opensearch","count":1},{"name":"Opensecrets","count":1},{"name":"Opensensemap","count":1},{"name":"Opensiddur","count":1},{"name":"Opensourcebrain","count":1},{"name":"Opensupplyhub","count":1},{"name":"Opentable","count":1},{"name":"Opentelemetry","count":1},{"name":"Openthc","count":1},{"name":"Openthesis","count":1},{"name":"Opentopodata","count":1},{"name":"Opentransportdata","count":1},{"name":"Opentrials","count":1},{"name":"Opentripmap","count":1},{"name":"Opentripplanner","count":1},{"name":"Oregon","count":1},{"name":"Orphadata","count":1},{"name":"Overpass api","count":1},{"name":"Overton","count":1},{"name":"Ox","count":1},{"name":"P3k14c","count":1},{"name":"Packagist","count":1},{"name":"Pandascore","count":1},{"name":"Pangaea","count":1},{"name":"Panlex","count":1},{"name":"Pantone","count":1},{"name":"Papyri","count":1},{"name":"Paris","count":1},{"name":"Parlgov","count":1},{"name":"Parliament","count":1},{"name":"Particle","count":1},{"name":"Partstack","count":1},{"name":"Patch","count":1},{"name":"Pavlovia","count":1},{"name":"Pcornet","count":1},{"name":"Pdc","count":1},{"name":"Pelagios","count":1},{"name":"Pennsieve","count":1},{"name":"Perseus","count":1},{"name":"Petabencana","count":1},{"name":"Pgvector","count":1},{"name":"Pharmgkb","count":1},{"name":"Phe","count":1},{"name":"Piconepress","count":1},{"name":"Pinterest","count":1},{"name":"Planet4589","count":1},{"name":"Plant","count":1},{"name":"Platzi","count":1},{"name":"Play","count":1},{"name":"Plos","count":1},{"name":"Pluralpolicy","count":1},{"name":"Pncp","count":1},{"name":"Pollinations","count":1},{"name":"Polygon","count":1},{"name":"Poweroutage","count":1},{"name":"Preprints","count":1},{"name":"Prereview","count":1},{"name":"Priceapi","count":1},{"name":"Pricesapi","count":1},{"name":"Prime numbers api","count":1},{"name":"Probes drugs","count":1},{"name":"Procore","count":1},{"name":"Project44","count":1},{"name":"Projectdatasphere","count":1},{"name":"Projectpq","count":1},{"name":"Promedmail","count":1},{"name":"Promptfoo","count":1},{"name":"Proquest","count":1},{"name":"Proteinatlas","count":1},{"name":"Protomaps","count":1},{"name":"Pubg","count":1},{"name":"Pulsemcp","count":1},{"name":"Puppeteer","count":1},{"name":"Pypa","count":1},{"name":"Qdrant","count":1},{"name":"Quickchart","count":1},{"name":"Quran","count":1},{"name":"Quranicaudio","count":1},{"name":"R spacex","count":1},{"name":"Ragas","count":1},{"name":"Raid","count":1},{"name":"Ranaroussi","count":1},{"name":"Random","count":1},{"name":"Rasa","count":1},{"name":"Ratehawk","count":1},{"name":"Rawg","count":1},{"name":"Rcaap","count":1},{"name":"Re3data","count":1},{"name":"Recollect","count":1},{"name":"Reconciliation api","count":1},{"name":"Recraft","count":1},{"name":"Recyclecoach","count":1},{"name":"Recyclenation","count":1},{"name":"Recyclingpartnership","count":1},{"name":"Reddithelp","count":1},{"name":"Reginfo","count":1},{"name":"Regrid","count":1},{"name":"Relevanceai","count":1},{"name":"Reliefweb","count":1},{"name":"Renewables","count":1},{"name":"Requesty","count":1},{"name":"Research","count":1},{"name":"Researchsquare","count":1},{"name":"Resend","count":1},{"name":"Resy","count":1},{"name":"Retailed","count":1},{"name":"Retool","count":1},{"name":"Reworkd","count":1},{"name":"Ripe","count":1},{"name":"Rki","count":1},{"name":"Roboflow","count":1},{"name":"Robotics transformer x","count":1},{"name":"Robotis","count":1},{"name":"Robotreviewer","count":1},{"name":"Rruff","count":1},{"name":"Rs online","count":1},{"name":"Rub","count":1},{"name":"Rubygems","count":1},{"name":"Rug","count":1},{"name":"Runpod","count":1},{"name":"Sabre","count":1},{"name":"Sacred texts","count":1},{"name":"Safecast","count":1},{"name":"Samhsa","count":1},{"name":"Sas","count":1},{"name":"Satnogs","count":1},{"name":"Sayari","count":1},{"name":"Schemastore","count":1},{"name":"Schiphol","count":1},{"name":"Scicrunch","count":1},{"name":"Sciety","count":1},{"name":"Scorecard","count":1},{"name":"Scrapindex","count":1},{"name":"Scrapmonster","count":1},{"name":"Sdsmanager","count":1},{"name":"Sdss","count":1},{"name":"Searates","count":1},{"name":"Searchapi","count":1},{"name":"Searoutes","count":1},{"name":"Sefaria","count":1},{"name":"Segmind","count":1},{"name":"Seismicportal","count":1},{"name":"Selenium","count":1},{"name":"Semi","count":1},{"name":"Semiconductors","count":1},{"name":"Sentinel hub","count":1},{"name":"Sentinelinitiative","count":1},{"name":"Sevenrooms","count":1},{"name":"Sglang","count":1},{"name":"Share eric","count":1},{"name":"Shareyourpaper","count":1},{"name":"Shovels","count":1},{"name":"Si digital framework","count":1},{"name":"Siemens","count":1},{"name":"Sikt","count":1},{"name":"Sil","count":1},{"name":"Siliconexpert","count":1},{"name":"Simfin","count":1},{"name":"Simple icons","count":1},{"name":"Sinay","count":1},{"name":"Sketchengine","count":1},{"name":"Skyvern","count":1},{"name":"Skyvern AI","count":1},{"name":"Smallworldofwords","count":1},{"name":"Smartcitizen","count":1},{"name":"Smarthealthit","count":1},{"name":"Snap","count":1},{"name":"Snomedtools","count":1},{"name":"Soa","count":1},{"name":"Sonatype","count":1},{"name":"Sourcengine","count":1},{"name":"Spaceflightnewsapi","count":1},{"name":"Species360","count":1},{"name":"Speckle","count":1},{"name":"Speechmatics","count":1},{"name":"Spire","count":1},{"name":"Splatalogue","count":1},{"name":"Sportdb","count":1},{"name":"Sportmonks","count":1},{"name":"Sportradar","count":1},{"name":"Sportsdata","count":1},{"name":"Spothero","count":1},{"name":"Spotify","count":1},{"name":"Squareup","count":1},{"name":"Stability","count":1},{"name":"Stacindex","count":1},{"name":"Stack ai","count":1},{"name":"Stackexchange","count":1},{"name":"Stagehand","count":1},{"name":"Statistics Canada","count":1},{"name":"Steamcommunity","count":1},{"name":"Steampowered","count":1},{"name":"Steamspy","count":1},{"name":"Stormglass","count":1},{"name":"Stratz","count":1},{"name":"Stsci","count":1},{"name":"Suggestic","count":1},{"name":"Sunnah","count":1},{"name":"Supabase","count":1},{"name":"Supermemory","count":1},{"name":"Surechembl","count":1},{"name":"Systemicpeace","count":1},{"name":"Talkbank","count":1},{"name":"Target","count":1},{"name":"Tatoeba","count":1},{"name":"Tavily","count":1},{"name":"Tc39","count":1},{"name":"Tdar","count":1},{"name":"Teamookla","count":1},{"name":"Techrxiv","count":1},{"name":"Telnyx","count":1},{"name":"Tensorchord","count":1},{"name":"Tga","count":1},{"name":"Thaiclinicaltrials","count":1},{"name":"The odds api","count":1},{"name":"Thecocktaildb","count":1},{"name":"Thecolorapi","count":1},{"name":"Thegamesdb","count":1},{"name":"Theroyallab","count":1},{"name":"Theses","count":1},{"name":"Thesportsdb","count":1},{"name":"Thetradedesk","count":1},{"name":"Thingsboard","count":1},{"name":"Thunderforest","count":1},{"name":"Ti","count":1},{"name":"Tii","count":1},{"name":"Tiingo","count":1},{"name":"TikTok","count":1},{"name":"Toasttab","count":1},{"name":"Toolforge","count":1},{"name":"Topoteretes","count":1},{"name":"Traceparts","count":1},{"name":"Tracker","count":1},{"name":"Trade","count":1},{"name":"Tradingeconomics","count":1},{"name":"TransformerOptimus","count":1},{"name":"Transitland","count":1},{"name":"Transitous","count":1},{"name":"Translated","count":1},{"name":"Transport","count":1},{"name":"Transportapi","count":1},{"name":"Trefle","count":1},{"name":"Trigger","count":1},{"name":"Tripadvisor","count":1},{"name":"Truefoundry","count":1},{"name":"Trustedparts","count":1},{"name":"Trychroma","count":1},{"name":"Turbopuffer","count":1},{"name":"Twitch","count":1},{"name":"Typebot","count":1},{"name":"U strasbg","count":1},{"name":"U.S. DOL","count":1},{"name":"U.S. NHTSA","count":1},{"name":"U.S. State Dept","count":1},{"name":"Ucdavis","count":1},{"name":"Ucs","count":1},{"name":"Ukdataservice","count":1},{"name":"Ukri","count":1},{"name":"Ultralibrarian","count":1},{"name":"Umich","count":1},{"name":"Unaids","count":1},{"name":"Unclecode","count":1},{"name":"Unctad","count":1},{"name":"Understandingsociety","count":1},{"name":"Unece","count":1},{"name":"Unfpa","count":1},{"name":"Uni koeln","count":1},{"name":"Unibaseio","count":1},{"name":"Unicef","count":1},{"name":"Unicode","count":1},{"name":"Unicode org","count":1},{"name":"Unify","count":1},{"name":"Unistra","count":1},{"name":"Universal robots","count":1},{"name":"Universaldependencies","count":1},{"name":"Unoda","count":1},{"name":"Upcdatabase","count":1},{"name":"Upenn","count":1},{"name":"Uradmonitor","count":1},{"name":"Urban","count":1},{"name":"Usanpn","count":1},{"name":"Usdoj","count":1},{"name":"Usecanopy","count":1},{"name":"Usgbc","count":1},{"name":"Usgpo","count":1},{"name":"Uspreventiveservicestaskforce","count":1},{"name":"Usps","count":1},{"name":"Utilityapi","count":1},{"name":"Uwa","count":1},{"name":"V dem","count":1},{"name":"Valhalla","count":1},{"name":"Vam","count":1},{"name":"Vamdc","count":1},{"name":"Vdaas","count":1},{"name":"Vedicscriptures","count":1},{"name":"Vellum","count":1},{"name":"Veriphone","count":1},{"name":"Verisk","count":1},{"name":"Vespa","count":1},{"name":"Vesselapi","count":1},{"name":"Vesselfinder","count":1},{"name":"Viaf","count":1},{"name":"Viator","count":1},{"name":"Vigiaccess","count":1},{"name":"Vivli","count":1},{"name":"Vllm","count":1},{"name":"Voiceflow","count":1},{"name":"Votesmart","count":1},{"name":"Voteview","count":1},{"name":"Voyageai","count":1},{"name":"Vtexplorer","count":1},{"name":"Wa","count":1},{"name":"Walmart","count":1},{"name":"Wandelbots","count":1},{"name":"Wang bioinformatics lab","count":1},{"name":"War","count":1},{"name":"Waybarrios","count":1},{"name":"Waza","count":1},{"name":"Weaviate","count":1},{"name":"Webaim","count":1},{"name":"Westmetall","count":1},{"name":"Wgsn","count":1},{"name":"What3words","count":1},{"name":"Whatwg","count":1},{"name":"Wheretheiss","count":1},{"name":"Whosonfirst","count":1},{"name":"Wigle","count":1},{"name":"Wikichip","count":1},{"name":"Wikisource","count":1},{"name":"Wiktionary","count":1},{"name":"Wild card","count":1},{"name":"Withmartian","count":1},{"name":"Wolfram","count":1},{"name":"Wolframalpha","count":1},{"name":"Wordnik","count":1},{"name":"Workers","count":1},{"name":"Worldly","count":1},{"name":"Worldpop","count":1},{"name":"Worldtides","count":1},{"name":"Wormbase","count":1},{"name":"Wpinvestigative","count":1},{"name":"Wsts","count":1},{"name":"WTO","count":1},{"name":"Wustl","count":1},{"name":"Wzb","count":1},{"name":"X refs","count":1},{"name":"X402","count":1},{"name":"Xbrl","count":1},{"name":"Ximilar","count":1},{"name":"Xorbitsai","count":1},{"name":"Yeastgenome","count":1},{"name":"Zbmath","count":1},{"name":"Zenquotes","count":1},{"name":"Zenrows","count":1},{"name":"Zilliztech","count":1},{"name":"Zylalabs","count":1}]},"categories":[{"category":"Accessibility, fonts & developer/code intelligence data","count":27,"entries":[{"n":"Bunny Fonts API","u":"https://fonts.bunny.net/about","co":"Bunny","f":"Free, keyless (GDPR-safe Google Fonts drop-in)","p":"n/a","b":"Privacy-friendly self-serve open font CSS/files","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CISA Known Exploited Vulnerabilities (KEV)","u":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","co":"CISA","f":"Free, keyless JSON/CSV feed (also GitHub mirror, CC0)","p":"n/a","b":"Authoritative list of actively exploited CVEs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ClearlyDefined API","u":"https://api.clearlydefined.io/api-docs/","co":"Clearlydefined","f":"Free, keyless public REST API (~2K req/min)","p":"n/a","b":"License, copyright & provenance data per component","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"COLOURlovers API","u":"https://www.colourlovers.com/api","co":"Colourlovers","f":"Free, keyless (read-only public endpoints)","p":"n/a","b":"Color, palette and pattern database lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"crates.io API","u":"https://crates.io/data-access","co":"Crates","f":"Free, keyless (User-Agent required, 1 req/s)","p":"n/a","b":"Rust crate registry package & version metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"deps.dev API (Open Source Insights)","u":"https://docs.deps.dev/api/v3/","co":"Deps","f":"Free, keyless (HTTP + gRPC)","p":"n/a","b":"Dependency graphs, advisories, license/SBOM signals","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ecosyste.ms Packages API","u":"https://packages.ecosyste.ms/","co":"Ecosyste","f":"Free, keyless (5000/hr per IP; email for polite pool)","p":"n/a","b":"Millions of packages' metadata across 100+ registries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"endoflife.date API","u":"https://endoflife.date/docs/api/v1/","co":"Endoflife","f":"Free, keyless","p":"n/a","b":"EOL/support lifecycle dates for 380+ products","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ENISA EU Vulnerability Database (EUVD)","u":"https://euvd.enisa.europa.eu/apidoc","co":"European Union","f":"Free, keyless","p":"n/a","b":"EU vuln aggregation with CVSS scores, exploitation status","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPSS API (FIRST.org)","u":"https://www.first.org/epss/api","co":"First","f":"Free, keyless (api.first.org/data/v1/epss)","p":"n/a","b":"Daily exploit-probability scores per CVE","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Font Awesome GraphQL API","u":"https://docs.fontawesome.com/apis","co":"Fontawesome","f":"Free w/ key (free account API token)","p":"n/a","b":"Query Font Awesome icon metadata, releases, search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Fontsource API","u":"https://fontsource.org/docs/api/introduction","co":"Fontsource","f":"Free, keyless read-only (api.fontsource.org/v1)","p":"n/a","b":"Self-host open-source font metadata via npm/CDN","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GitHub Advisory Database","u":"https://docs.github.com/en/rest/security-advisories/global-advisories","co":"En","f":"Free; REST global-advisories endpoint works keyless for public data, GraphQL securityAdvisories needs a no-scope PAT","p":"n/a","b":"GHSA + CVE advisories per package/ecosystem","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GitHub Emojis API","u":"https://docs.github.com/en/rest/emojis/emojis","co":"En","f":"Free, keyless (higher limits w/ token)","p":"n/a","b":"List GitHub-supported emoji names and image URLs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GitHub Search/Repos REST API","u":"https://docs.github.com/en/rest/search/search","co":"En","f":"Free w/ token (code search 30/min auth)","p":"n/a","b":"Search code, repos and commits across GitHub","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Fonts Developer API","u":"https://developers.google.com/fonts/docs/developer_api","co":"Google","f":"Free w/ key (generic Google Cloud API key, Web Fonts Developer API enabled)","p":"n/a","b":"Metadata for all Google Fonts families, styles, subsets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Iconify API","u":"https://iconify.design/docs/api/","co":"Iconify","f":"Free, keyless public API","p":"n/a","b":"275k+ icons from 200+ open icon sets, SVG on demand","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Libraries.io API","u":"https://libraries.io/api","co":"Libraries","f":"Free w/ key, 60 req/min","p":"n/a","b":"Cross-ecosystem package, version & dependency metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MITRE CWE/CAPEC REST API","u":"https://cwe-api.mitre.org/api/v1/","co":"MITRE","f":"Free, keyless (no registration)","p":"n/a","b":"Weakness (CWE) and attack-pattern (CAPEC) taxonomy data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NVD CVE/CPE API (NIST)","u":"https://nvd.nist.gov/developers/vulnerabilities","co":"NIST","f":"Free, keyless (key raises rate limit)","p":"n/a","b":"Canonical CVE records and CPE product dictionary","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OSV.dev (Open Source Vulnerabilities)","u":"https://google.github.io/osv.dev/api/","co":"Google","f":"Free, keyless (api.osv.dev/v1)","p":"n/a","b":"Query package versions/commits for known vulns","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Simple Icons (jsDelivr CDN / npm)","u":"https://github.com/simple-icons/simple-icons","co":"Simple icons","f":"Free, keyless via CDN/npm","p":"n/a","b":"3400+ SVG brand icons with hex colors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Software Heritage API","u":"https://archive.softwareheritage.org/api/","co":"Softwareheritage","f":"Free, anonymous (120 req/hr; token raises to 1200/hr)","p":"n/a","b":"Navigate/archive the global source-code graph","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Sonatype OSS Index API","u":"https://ossindex.sonatype.org/","co":"Sonatype","f":"Free w/ account token (auth now required)","p":"n/a","b":"Component vuln reports keyed to CVEs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sourcegraph GraphQL Search API","u":"https://sourcegraph.com/docs/api/graphql/search","co":"Sourcegraph","f":"Free w/ token on Sourcegraph.com","p":"n/a","b":"Full-text/regex code search with git metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SPDX License List data","u":"https://github.com/spdx/license-list-data","co":"Spdx","f":"Free, keyless (JSON/RDFa/HTML via GitHub + jsDelivr)","p":"n/a","b":"Canonical open-source license IDs, names, full texts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WAVE Accessibility API (WebAIM)","u":"https://wave.webaim.org/api/","co":"Webaim","f":"100 free starter credits per account, then paid","p":"~$0.04 per credit (250-credit min; 1 credit = basic page scan)","b":"Automated WCAG accessibility scan of a URL","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Advertising, Ad-tech & Marketing","count":34,"entries":[{"n":"Abstract Email Validation API","u":"https://www.abstractapi.com/api/email-verification-validation-api","co":"Abstractapi","f":"Free w/ key, 100 requests/mo, no card required","p":"~$9/mo","b":"Real-time email deliverability/validation checks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Amazon Ads API","u":"https://advertising.amazon.com/API/docs/en-us/reference/api-overview","co":"Amazon","f":"Free w/ approved app + OAuth (approval required)","p":"n/a (ad spend separate)","b":"Sponsored Products/Brands campaign management","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Bitly API","u":"https://dev.bitly.com/","co":"Bitly","f":"Free w/ key, ~1,000 API calls/mo, unlimited clicks tracked","p":"~$8/mo (Core plan)","b":"Short links and click/campaign link tracking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Brevo (Sendinblue) API","u":"https://developers.brevo.com/","co":"Brevo","f":"Free w/ key, 300 emails/day, unlimited contacts, full API","p":"~$9/mo (Starter)","b":"Transactional + marketing email, SMS, CRM sync","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Buffer API","u":"https://buffer.com/developers/api","co":"Buffer","f":"Free w/ OAuth app, social scheduling endpoints","p":"$6/mo per channel","b":"Scheduling and analytics for social marketing posts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Customer.io API","u":"https://docs.customer.io/integrations/api/","co":"Customer","f":"Free trial w/ key (no permanent free tier); full Track/App/Pipelines APIs","p":"~$100/mo (Essentials, volume-based)","b":"Behavioral messaging, lifecycle campaigns, customer data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DataForSEO API","u":"https://dataforseo.com/apis","co":"Dataforseo","f":"Free sandbox/playground; ~$1 trial credit","p":"Pay-as-you-go from ~$0.0006/SERP","b":"SERP, keyword, backlink and SEO/SEM data at scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Ads API","u":"https://developers.google.com/google-ads/api","co":"Google","f":"Free w/ developer token + OAuth (manager account needed)","p":"n/a (ad spend separate)","b":"Programmatic Google search/display campaign management","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Google Ads Transparency Center (EEA Ads data API)","u":"https://adstransparency.google.com/","co":"Google","f":"Free public browsing; official EEA ads data API requires access approval/agreement","p":"n/a","b":"Browsing advertiser ad creatives and political ads","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Google Analytics Data API (GA4)","u":"https://developers.google.com/analytics/devguides/reporting/data/v1","co":"Google","f":"Free w/ OAuth, included with GA4 account","p":"n/a","b":"Marketing/web analytics reporting and dashboards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"HubSpot CRM & Marketing API","u":"https://developers.hubspot.com/docs/api/overview","co":"Hubspot","f":"Free w/ key, free CRM tier, generous daily request limits, dev sandbox","p":"~$15/mo (Starter)","b":"CRM contacts, deals, marketing automation, forms","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hunter.io API","u":"https://hunter.io/api","co":"Hunter","f":"Free w/ key, 25 searches + 50 verifications/mo","p":"~$34/mo (Starter)","b":"B2B email finding and verification for outreach","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Klaviyo API","u":"https://developers.klaviyo.com/","co":"Klaviyo","f":"Free w/ key, free plan up to 250 contacts/500 sends, full API","p":"~$20/mo (volume-based)","b":"Ecommerce email/SMS, customer data, segmentation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LinkedIn Marketing API","u":"https://learn.microsoft.com/en-us/linkedin/marketing/","co":"Microsoft","f":"Free w/ approved app + OAuth (review required)","p":"n/a (ad spend separate)","b":"LinkedIn B2B ad campaigns, lead gen, page analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mailchimp Marketing API","u":"https://mailchimp.com/developer/marketing/api/","co":"Mailchimp","f":"Free w/ key, free plan 1,000 sends/mo, 1 audience","p":"~$13/mo (Essentials)","b":"Email marketing campaigns, audiences, automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mailgun API","u":"https://documentation.mailgun.com/","co":"Mailgun","f":"Free trial w/ key, 100 emails/day, email validation API","p":"$15/mo (10k emails)","b":"Transactional email delivery and email validation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Meta Ad Library API","u":"https://www.facebook.com/ads/library/api/","co":"Meta","f":"Free w/ access token, public ad transparency data (political/social/issue ads)","p":"n/a","b":"Researching political/social ad transparency data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Meta Marketing API","u":"https://developers.facebook.com/docs/marketing-api/","co":"Meta","f":"Free w/ app + access token (ad account needed)","p":"n/a (ad spend separate)","b":"Facebook/Instagram ad campaign automation and insights","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Microsoft Advertising API (Bing Ads)","u":"https://learn.microsoft.com/en-us/advertising/","co":"Microsoft","f":"Free w/ developer token + OAuth","p":"n/a (ad spend separate)","b":"Bing/Microsoft search ad management and reporting","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Moz API","u":"https://moz.com/products/api","co":"Moz","f":"Free tier for testing (limited rows/mo)","p":"$5/mo (entry, scaling up)","b":"Domain authority and backlink/link metrics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pinterest API (v5)","u":"https://developers.pinterest.com/docs/api/v5/","co":"Pinterest","f":"Free w/ approved app + OAuth, open access","p":"n/a (ad spend separate)","b":"Pinterest ad campaigns, pins, and analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Reddit Ads API","u":"https://business.reddithelp.com/s/article/Reddit-Ads-API","co":"Reddithelp","f":"Free w/ OAuth + Reddit Ads account","p":"n/a (ad spend separate)","b":"Reddit ad campaign automation and performance data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Resend API","u":"https://resend.com/docs/api-reference/introduction","co":"Resend","f":"Free w/ key, 3,000 emails/mo, 100/day","p":"$20/mo (50k emails)","b":"Developer-friendly transactional and marketing email","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SearchApi.io","u":"https://www.searchapi.io/","co":"Searchapi","f":"Free w/ key, 100 searches (one-time trial, no card)","p":"$40/mo (10k searches)","b":"Multi-engine SERP API (Google, Bing, YouTube)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SerpApi","u":"https://serpapi.com/","co":"Serpapi","f":"Free w/ key, 100 searches/mo","p":"$75/mo (5,000 searches)","b":"Structured Google/Bing SERP and ad results scraping","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Serper.dev","u":"https://serper.dev/","co":"Serper","f":"Free w/ key, 2,500 queries (one-time, no card)","p":"$50 (50k queries, pay-as-you-go)","b":"Fast low-cost Google SERP API for SEO/SEM","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Snapchat Marketing API","u":"https://marketingapi.snapchat.com/","co":"Snap","f":"Free w/ app + OAuth (ad account needed)","p":"n/a (ad spend separate)","b":"Snapchat ad campaign management and reporting","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"TikTok Marketing API (API for Business)","u":"https://business-api.tiktok.com/portal/docs","co":"TikTok","f":"Free w/ approved app + access token (ad account needed)","p":"n/a (ad spend separate)","b":"TikTok ad campaign creation and performance data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Twilio SendGrid Email API","u":"https://www.twilio.com/docs/sendgrid/api-reference","co":"Twilio","f":"Free Marketing plan 6,000 emails/mo, 2k contacts; 60-day trial for Email API","p":"$19.95/mo (Essentials)","b":"High-volume transactional and marketing email","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ActiveCampaign API","u":"https://developers.activecampaign.com/reference","co":"Activecampaign","f":"none (14-day trial)","p":"$15/mo (Starter)","b":"Email marketing automation and CRM workflows","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Ahrefs API","u":"https://ahrefs.com/api","co":"Ahrefs","f":"none","p":"Enterprise plan (~$999+/mo)","b":"Comprehensive backlink and SEO data at scale","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Constant Contact v3 API","u":"https://developer.constantcontact.com/api_reference/index.html","co":"Constantcontact","f":"none (free dev account; 60-day product trial)","p":"~$12/mo (Lite)","b":"SMB email marketing, contacts, campaigns","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Iterable API","u":"https://api.iterable.com/api/docs","co":"Iterable","f":"none (demo/sales-led)","p":"Custom/enterprise pricing","b":"Cross-channel lifecycle marketing orchestration","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"TikTok / Snapchat / Microsoft style DSP — The Trade Desk API","u":"https://partner.thetradedesk.com/v3/portal/api/overview","co":"Thetradedesk","f":"none (partner-only DSP access)","p":"Partner/contract pricing","b":"Programmatic DSP campaign and audience management","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Aerospace & Defense","count":29,"entries":[{"n":"ADS-B Exchange API","u":"https://www.adsbexchange.com/data/","co":"Adsbexchange","f":"Free for data feeders; RapidAPI trial otherwise","p":"RapidAPI paid tiers","b":"Unfiltered global ADS-B incl. military aircraft tracking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ADSB.lol API","u":"https://api.adsb.lol/docs","co":"Adsb","f":"Free, keyless (community ADS-B feed)","p":"n/a","b":"Live aircraft positions by hex, callsign, radius","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AeroDataBox","u":"https://aerodatabox.com/","co":"Aerodatabox","f":"Free ~300-600 calls/mo via API.market ($0.99 trial on RapidAPI)","p":"$5/mo for 3,000 calls","b":"Flight status, schedules, airport and aircraft data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Aviation Weather Center API (NOAA/AWC)","u":"https://aviationweather.gov/data/api/","co":"NWS (NOAA)","f":"Free, keyless","p":"n/a","b":"METAR, TAF, PIREP, SIGMET aviation weather data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Aviationstack","u":"https://aviationstack.com/","co":"Aviationstack","f":"Free 100 req/mo w/ key","p":"$49.99/mo for 10,000 calls","b":"Real-time flight status, routes, airlines, airports","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CelesTrak (GP/TLE/OMM)","u":"https://celestrak.org/NORAD/elements/","co":"CelesTrak","f":"Free, keyless","p":"n/a","b":"Satellite orbital elements (TLE/OMM/JSON/CSV) by group","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Copernicus Data Space Ecosystem / Sentinel Hub","u":"https://dataspace.copernicus.eu/analyse/apis","co":"Copernicus","f":"Free tier w/ registration (quotas)","p":"paid plans for higher quota","b":"Sentinel satellite imagery, STAC, openEO, processing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DHS HIFLD Open Data (ArcGIS)","u":"https://hifld-geoplatform.opendata.arcgis.com/","co":"Arcgis","f":"Free, keyless (GeoServices/WMS/WFS, CSV/GeoJSON)","p":"n/a","b":"US critical infrastructure incl. military districts geodata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FAA Aircraft Registry (Releasable DB)","u":"https://www.faa.gov/licenses_certificates/aircraft_certification/aircraft_registry/releasable_aircraft_download","co":"FAA","f":"Free, keyless (bulk CSV download)","p":"n/a","b":"US civil aircraft registration, owner, airworthiness","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FAA NOTAM API","u":"https://api.faa.gov/s/","co":"FAA","f":"Free w/ access request (OAuth client credentials)","p":"n/a","b":"Programmatic NOTAMs in GeoJSON/AIXM from SWIM","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"ICAO API Data Service","u":"https://www.icao.int/api-data-service","co":"Icao","f":"Free trial 100 calls w/ registration","p":"paid subscription tiers","b":"Aircraft type designators, aerodromes, official aviation refs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"N2YO Satellite Tracking API","u":"https://www.n2yo.com/api/","co":"N2yo","f":"Free w/ key; 1000 transactions/hour","p":"n/a","b":"Real-time satellite positions, passes, TLE, radio passes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA Earthdata CMR API","u":"https://www.earthdata.nasa.gov/engage/open-data-services-software/earthdata-developer-portal/cmr-api","co":"NASA","f":"Free; search keyless, download needs Earthdata login","p":"n/a","b":"Search NASA/partner satellite Earth observation metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA GIBS Imagery APIs","u":"https://www.earthdata.nasa.gov/engage/open-data-services-software/earthdata-developer-portal/gibs-api","co":"NASA","f":"Free, keyless (WMTS/WMS/TWMS)","p":"n/a","b":"Global daily satellite imagery tiles (1000+ products)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA Open APIs (api.nasa.gov)","u":"https://api.nasa.gov/","co":"NASA","f":"Free w/ key; DEMO_KEY keyless, 1000 req/hr w/ key","p":"n/a","b":"APOD, EPIC, GIBS imagery, DONKI space weather","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"NASA SSCWeb (Satellite Situation Center)","u":"https://sscweb.gsfc.nasa.gov/WebServices/","co":"NASA","f":"Free, keyless (REST/SOAP)","p":"n/a","b":"Spacecraft trajectories, ephemerides, magnetic coordinates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Notify","u":"http://open-notify.org/Open-Notify-API/","co":"Open notify","f":"Free, keyless","p":"n/a","b":"ISS current location and people in space now","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenSky Network API","u":"https://openskynetwork.github.io/opensky-api/","co":"Openskynetwork","f":"Free; 400 credits/day anon, 4000/day w/ login","p":"n/a","b":"Real-time and historical ADS-B aircraft tracking","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OurAirports Open Data","u":"https://ourairports.com/data/","co":"Ourairports","f":"Free, keyless (CSV downloads, public domain)","p":"n/a","b":"Global airports, runways, frequencies, navaids","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"r-spacex SpaceX API","u":"https://github.com/r-spacex/SpaceX-API","co":"R spacex","f":"Free, keyless","p":"n/a","b":"SpaceX launches, cores, capsules, Starlink, pads","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SatNOGS DB API","u":"https://db.satnogs.org/api/","co":"Satnogs","f":"Free; read keyless, write needs token","p":"n/a","b":"Crowdsourced satellite, transmitter, TLE, telemetry DB","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Military Expenditure Database","u":"https://www.sipri.org/databases/milex","co":"Sipri","f":"Free download (Excel; no formal API)","p":"n/a","b":"Cross-country military spending time series 1949-present","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Space-Track.org","u":"https://www.space-track.org/documentation","co":"Space-Track","f":"Free w/ account (US Space Force, registration req.)","p":"n/a","b":"Authoritative satellite catalog, GP/TLE, CDM conjunctions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Spaceflight News API (SNAPI)","u":"https://www.spaceflightnewsapi.net/","co":"Spaceflightnewsapi","f":"Free, keyless","p":"n/a","b":"Aggregated spaceflight news, blogs, reports","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"The Space Devs Launch Library 2","u":"https://thespacedevs.com/llapi","co":"Thespacedevs","f":"Free, keyless (rate-limited)","p":"n/a","b":"Orbital/suborbital launch schedules, rockets, agencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TLE API (tle.ivanstanojevic.me)","u":"https://tle.ivanstanojevic.me/api/tle/","co":"Ivanstanojevic","f":"Free, keyless (JSON, CelesTrak-sourced)","p":"n/a","b":"Developer-friendly JSON TLE lookup and search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USAspending API (DoD contracts)","u":"https://api.usaspending.gov/","co":"USAspending","f":"Free, keyless","p":"n/a","b":"Defense spending, contracts and awards by agency","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Where the ISS at? (wheretheiss.at)","u":"https://wheretheiss.at/w/developer","co":"Wheretheiss","f":"Free, keyless (~1 req/sec)","p":"n/a","b":"Real-time ISS position, velocity, TLE, timezone","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LeoLabs API","u":"https://platform.leolabs.space/documentation/api","co":"Leolabs","f":"none (trial subscription on request)","p":"commercial subscription (contact sales)","b":"Radar-tracked SSA, conjunction CDM alerts, ephemerides","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Agent evaluation & observability (open)","count":24,"entries":[{"n":"AgentOps","u":"https://www.agentops.ai/","co":"Agentops","f":"Open-source SDK; hosted free tier (1k events/mo class)","p":"low-cost Pro (contact/per-usage)","b":"Agent session replay, tool-call tracking, CrewAI/AutoGen monitoring","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Arize Phoenix","u":"https://arize.com/docs/phoenix","co":"Arize","f":"Free open-source self-host; AX hosted free tier $0","p":"$50/mo (AX Pro)","b":"OTel-native LLM tracing and evaluation, framework-agnostic","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Braintrust","u":"https://www.braintrust.dev/docs","co":"Braintrust","f":"Free Starter tier: 1GB processed data/mo, 10k scores, 14-day retention, unlimited users; proprietary","p":"$249/mo (Pro)","b":"Unified eval, experiments and CI/CD scoring for LLM apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Chainlit","u":"https://github.com/Chainlit/chainlit","co":"Chainlit","f":"Free, open-source (Apache 2.0) conversational-AI app framework","p":"n/a","b":"Building chat UIs with built-in step/trace observability","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DeepEval (Confident AI)","u":"https://deepeval.com/","co":"Deepeval","f":"Free, open-source eval framework; Confident AI cloud free tier","p":"n/a (enterprise contact)","b":"Pytest-style LLM unit testing, G-Eval, hallucination metrics","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Evidently AI","u":"https://www.evidentlyai.com/evidently-oss","co":"Evidentlyai","f":"Free, open-source Python library (100+ ML/LLM metrics)","p":"n/a (Evidently Cloud separate)","b":"Open-source ML and LLM evaluation, testing, monitoring","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Helicone","u":"https://docs.helicone.ai/","co":"Helicone","f":"Free open-source (Apache 2.0) self-host; cloud free 10k requests/mo","p":"$20/seat/mo (Pro)","b":"One-line LLM proxy/gateway observability and cost tracking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Laminar (lmnr)","u":"https://laminar.sh/","co":"Laminar","f":"Free open-source self-host; cloud free 1GB data/mo, 15-day retention","p":"low-cost Hobby + $2 per 1GB overage","b":"OTel-native observability purpose-built for AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Langfuse","u":"https://langfuse.com/docs/api","co":"Langfuse","f":"Free self-host (MIT); cloud Hobby free 50k observations/mo, no card","p":"$29/mo (Core)","b":"Open-source LLM tracing, evals, prompt mgmt, datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LangSmith (LangChain)","u":"https://docs.smith.langchain.com/","co":"LangChain","f":"Free Developer tier (1 seat, 5k traces/mo); not open-source","p":"$39/seat/mo (Plus)","b":"End-to-end LLM/agent tracing, evals, deployment for LangChain","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Langtrace","u":"https://www.langtrace.ai/","co":"Langtrace","f":"Free, open-source OTel-based tracing; self-host or hosted free tier","p":"n/a (contact for scale)","b":"Open-telemetry tracing, evals, prompt/dataset management","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lunary","u":"https://lunary.ai/","co":"Lunary","f":"Free, open-source (Apache 2.0) self-host; cloud free 10k events/mo, 3 projects, 30-day retention","p":"low-cost Team plan (contact)","b":"Open-source LLM analytics, tracing, prompt management","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MLflow GenAI (Tracing & Eval)","u":"https://mlflow.org/docs/latest/genai/","co":"Mlflow","f":"Free, fully open-source (Apache 2.0); OTel-compatible tracing + LLM-judge eval","p":"n/a (Databricks Managed MLflow separate)","b":"Open-source LLM/agent tracing, evaluation, prompt versioning","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenInference (Arize)","u":"https://arize-ai.github.io/openinference/spec/","co":"Arize","f":"Free, open-source semantic-convention spec + instrumentation libs","p":"n/a","b":"OTel semantic conventions for AI/LLM trace instrumentation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenLIT","u":"https://openlit.io/","co":"Openlit","f":"Free, open-source (Apache 2.0) self-hosted platform","p":"n/a","b":"OTel-native LLM, vectorDB and GPU observability","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenLLMetry (Traceloop)","u":"https://github.com/traceloop/openllmetry","co":"Traceloop","f":"Free, open-source (Apache 2.0) OTel-based instrumentation SDK","p":"n/a (Traceloop cloud separate)","b":"Vendor-neutral OpenTelemetry LLM/GenAI instrumentation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenTelemetry GenAI Semantic Conventions","u":"https://opentelemetry.io/docs/specs/semconv/gen-ai/","co":"Opentelemetry","f":"Free, open standard (CNCF) for GenAI span/metric attributes","p":"n/a","b":"Standard schema for prompts, tokens, tool/agent calls","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Opik (Comet)","u":"https://www.comet.com/docs/opik/","co":"Comet","f":"Free open-source self-host; hosted free 25k spans/mo, unlimited users","p":"$39/mo (Pro, 100k spans)","b":"Open-source tracing, LLM-as-judge evals, agent monitoring","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Phoenix Evals API (Arize)","u":"https://arize.com/docs/phoenix/evaluation/llm-evals","co":"Arize","f":"Free, open-source LLM-as-judge evaluator library (arize-phoenix-evals) bundled with Phoenix","p":"n/a","b":"Pre-built LLM evaluators for hallucination, relevance, toxicity","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"promptfoo","u":"https://www.promptfoo.dev/docs/intro/","co":"Promptfoo","f":"Free, fully open-source (MIT) CLI/library, runs locally","p":"n/a (enterprise contact)","b":"Local prompt/agent eval, benchmarking, LLM red-teaming","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pydantic Logfire","u":"https://pydantic.dev/logfire","co":"Pydantic","f":"OTel-based; generous free tier (10M spans/mo class), SDK open-source","p":"low-cost Pro (usage-based)","b":"OTel observability for Python apps and Pydantic AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ragas","u":"https://www.ragas.io/","co":"Ragas","f":"Free, open-source Python library (Apache 2.0)","p":"n/a","b":"Reference-free RAG evaluation metrics and synthetic test data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"TruLens","u":"https://www.trulens.org/","co":"Lens.org","f":"Free, fully open-source (by Snowflake/TruEra)","p":"n/a","b":"RAG Triad evals and OTel tracing for LLM/agent apps","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Weights & Biases Weave","u":"https://wandb.ai/site/weave","co":"Wandb","f":"Free personal tier; SDK open-source (Apache 2.0)","p":"contact/usage-based","b":"LLM app tracing, evaluation, and experiment comparison","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Agent orchestration frameworks","count":25,"entries":[{"n":"AG2 (formerly AutoGen) framework","u":"https://docs.ag2.ai/","co":"Ag2","f":"Free, open source (Apache 2.0)","p":"n/a","b":"Multi-agent conversation/orchestration; needs LLM API key","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"AgentOps","u":"https://docs.agentops.ai/","co":"Agentops","f":"Free tier (events/runs capped per month)","p":"Pro ~$40-49/mo","b":"Multi-agent monitoring (CrewAI, AG2/AutoGen, OpenAI SDK)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Arize Phoenix","u":"https://arize.com/docs/phoenix","co":"Arize","f":"Free open-source self-host; OTel-based tracing","p":"Managed cloud from ~$50/mo","b":"Open-source LLM/agent tracing and evaluation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Azure AI Foundry Agent Service","u":"https://learn.microsoft.com/en-us/azure/ai-foundry/agents/","co":"Microsoft","f":"Azure free credits; pay-as-you-go otherwise","p":"Consumption-based (tokens + tools + infra)","b":"Managed hosting for Agent Framework / Semantic Kernel agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Braintrust","u":"https://www.braintrust.dev/docs","co":"Braintrust","f":"Free Starter, 1M trace spans + 10k scores, unlimited users","p":"Pro $249/mo","b":"Evals + observability for LLM/agent pipelines","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Confident AI (DeepEval)","u":"https://docs.confident-ai.com/","co":"Confident ai","f":"Free forever tier (5 test runs/wk, 1GB spans, 2 seats); DeepEval OSS (Apache 2.0)","p":"Starter $19.99/seat/mo","b":"LLM/agent evaluation, regression testing, dashboards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CrewAI AMP / Enterprise API","u":"https://docs.crewai.com/en/enterprise/introduction","co":"CrewAI","f":"Free tier, 50 executions/mo, 1 deployed crew","p":"Professional $25/mo (100 executions)","b":"REST kickoff/status API for deployed CrewAI crews","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Haystack Enterprise Platform (deepset)","u":"https://www.deepset.ai/products-and-services/haystack-enterprise-platform","co":"deepset","f":"Free trial; Haystack OSS free (Apache 2.0)","p":"n/a (custom enterprise pricing)","b":"Managed/self-hosted RAG + agent pipeline deployment","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Helicone","u":"https://docs.helicone.ai/","co":"Helicone","f":"Free Hobby tier, 10,000 requests/mo, no card","p":"Pro $79/mo","b":"LLM gateway/proxy with caching, routing, tracing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Langfuse","u":"https://langfuse.com/docs/api","co":"Langfuse","f":"Free cloud Hobby tier; self-host free, unlimited (MIT)","p":"Core (cloud) from $29/mo","b":"Open-source tracing/eval for any agent framework","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LangGraph Platform (Cloud)","u":"https://docs.langchain.com/langgraph-platform","co":"LangChain","f":"1 free dev deployment on Plus plan","p":"$0.001/node + standby; Plus $39/seat/mo","b":"Hosted deployment/serving of LangGraph agent graphs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"LangSmith (LangChain)","u":"https://docs.smith.langchain.com/","co":"LangChain","f":"Free Developer plan, 5,000 traces/mo, no card","p":"Plus $39/seat/mo (10k traces incl.)","b":"Tracing, eval, prompt mgmt for LangChain/LangGraph agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"LiteLLM","u":"https://docs.litellm.ai/","co":"Litellm","f":"Free, open source (MIT); self-host proxy/SDK","p":"Enterprise custom","b":"Unified LLM gateway/proxy across 100+ providers for agents","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Literal AI (Chainlit)","u":"https://docs.literalai.com/","co":"Literalai","f":"Free tier available","p":"Team plan (usage-based)","b":"Observability/eval for LLM and agent applications","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LlamaExtract (LlamaCloud)","u":"https://docs.cloud.llamaindex.ai/llamaextract/getting_started/api","co":"LlamaIndex","f":"Free w/ key, shared LlamaCloud 10k credits/mo","p":"Usage-based credits, ~$1.25 per 1,000","b":"Schema-driven structured data extraction from documents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"LlamaParse (LlamaCloud)","u":"https://developers.llamaindex.ai/llamaparse/parse/getting_started/","co":"LlamaIndex","f":"Free w/ key, 10k credits/mo (~3,300-10,000 pages)","p":"Usage-based, ~$1.25 per 1,000 credits","b":"Parsing PDFs/docs to clean text for RAG/agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Microsoft Agent Framework (AutoGen + Semantic Kernel)","u":"https://learn.microsoft.com/en-us/agent-framework/overview/","co":"Microsoft","f":"Free, open source (MIT); GA 1.0 (.NET + Python)","p":"n/a","b":"Microsoft multi-agent orchestration SDK; AutoGen now maintenance-mode","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"MLflow LLM/Agent Tracing","u":"https://mlflow.org/docs/latest/llms/tracing/index.html","co":"Mlflow","f":"Free, open source (Apache 2.0), self-host","p":"n/a (managed via Databricks)","b":"Open-source agent tracing/eval, broad framework support","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenLLMetry (Traceloop)","u":"https://www.traceloop.com/docs/openllmetry/introduction","co":"Traceloop","f":"Open source (Apache 2.0) SDK free; free Traceloop tier","p":"Paid plans (usage-based)","b":"OpenTelemetry-based instrumentation for LLM/agent apps","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Opik (Comet)","u":"https://www.comet.com/docs/opik/","co":"Comet","f":"Open source (Apache 2.0) self-host free; free cloud tier","p":"Pro from ~$39/mo","b":"Open-source LLM/agent tracing, eval, and monitoring","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Portkey","u":"https://portkey.ai/docs","co":"Portkey","f":"Free tier (10k requests/mo); gateway open source","p":"Pro from ~$49/mo","b":"LLM gateway with routing, guardrails, observability for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pydantic AI Gateway","u":"https://pydantic.dev/docs/ai/overview/gateway/","co":"Pydantic","f":"Free during beta; core open source; billed via Logfire","p":"n/a (beta; usage billed through Logfire)","b":"Unified LLM provider gateway with cost limits/observability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pydantic Logfire","u":"https://logfire.pydantic.dev/docs/","co":"Pydantic","f":"Free Personal plan, 10M spans/mo, 30-day retention","p":"Team $49/mo ($2/M overage)","b":"OpenTelemetry observability for Pydantic AI agents/LLMs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Weave (Weights & Biases)","u":"https://weave-docs.wandb.ai/","co":"Wandb","f":"Free personal tier on W&B","p":"Team plans (usage/seat-based)","b":"Tracing and eval for LLM apps and agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAI Agents SDK + Responses API","u":"https://platform.openai.com/docs/guides/agents","co":"OpenAI","f":"none (SDK free/open source; API metered)","p":"Standard token + tool-use rates (no separate fee)","b":"Agent orchestration, handoffs, tools, built-in tracing","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"}]},{"category":"Agent tooling & sandboxes","count":30,"entries":[{"n":"Apify","u":"https://docs.apify.com/api/v2","co":"Apify","f":"Free: $5 platform credits/mo, no card, full Store access","p":"Starter $29/mo + pay-as-you-go","b":"Prebuilt scraping Actors + agent web automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Blaxel","u":"https://blaxel.ai/","co":"Blaxel","f":"Free tier with starter compute credits","p":"Usage-based per-second compute","b":"Agent sandboxes + serverless agent hosting runtime","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Brave Search API","u":"https://brave.com/search/api/","co":"Brave","f":"Free: 2,000 queries/mo, 1 query/s (no card)","p":"Base $5/1k queries (or $3/mo plan)","b":"Independent-index web search grounding for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Browserbase","u":"https://docs.browserbase.com/","co":"Browserbase","f":"Free: 1 browser-hour, 3 concurrent sessions","p":"Developer $20/mo (100 hrs, 25 concurrent)","b":"Cloud headless browsers for AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Browserless","u":"https://www.browserless.io/","co":"Browserless","f":"Free: 1,000 units/mo, 1 concurrent browser","p":"Prototyping $25/mo (billed annually)","b":"Headless Chrome API, BrowserQL, self-host option","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CodeSandbox SDK","u":"https://codesandbox.io/docs/sdk","co":"Codesandbox","f":"Free tier with ~1,100 VM credits included","p":"Pay-as-you-go $0.01486/VM credit","b":"Ephemeral VM micro-sandboxes for agent workflows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Composio","u":"https://composio.dev/","co":"Composio","f":"Free: 20,000 tool calls/mo, no card required","p":"$29/mo (small teams)","b":"Auth + tool integrations (10k+ apps) for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Daytona","u":"https://www.daytona.io/docs/","co":"Daytona","f":"$200 free compute + 5 GB free storage, no monthly base fee","p":"Pay-as-you-go per-second (~$0.0504/vCPU-hr)","b":"Fast elastic sandboxes for AI-generated code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"E2B","u":"https://e2b.dev/docs","co":"E2b","f":"Free Hobby tier + one-time $100 credit (~855 hrs compute)","p":"Pro $150/mo base + usage ($0.0504/vCPU-hr)","b":"Secure code-interpreter sandboxes for AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Exa","u":"https://exa.ai/","co":"Exa","f":"Free: $10 credits/mo (~1,000 searches)","p":"Search $5/1k requests","b":"Neural/semantic web search API for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Firecrawl","u":"https://docs.firecrawl.dev/","co":"Firecrawl","f":"Free: ~500 credits/mo, no card","p":"Hobby $16/mo (3,000 credits)","b":"Scrape/crawl web into LLM-ready markdown for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hyperbrowser","u":"https://www.hyperbrowser.ai/docs/home","co":"Hyperbrowser","f":"Free credit tier; Playwright/Puppeteer compatible","p":"Credit-based ~$0.10/browser-hr + proxy $/GB","b":"Scalable cloud browsers + AI browse/extract actions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Jina AI Reader","u":"https://jina.ai/reader/","co":"Jina","f":"Keyless via r.jina.ai prefix; 10M free tokens w/ key","p":"~$20/mo for more tokens/higher QPS","b":"URL-to-LLM-markdown reader for agent grounding","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Linkup","u":"https://www.linkup.so/","co":"Linkup","f":"Free: €5 credits/mo, no card","p":"Pay-as-you-go ~€0.005/standard search","b":"Web search API optimized for AI agent answers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Modal","u":"https://modal.com/docs/guide/sandbox","co":"Modal","f":"Starter: $30/mo compute credits free, no idle charges","p":"Usage-based (~$0.0000394/core/s CPU), GPU extra","b":"Serverless sandboxes + GPU compute for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Northflank Sandboxes","u":"https://northflank.com/","co":"Northflank","f":"Free trial credits; sandbox API for code execution","p":"Usage-based compute pricing","b":"Secure container sandboxes for AI-generated code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Official MCP Registry","u":"https://registry.modelcontextprotocol.io/","co":"Modelcontextprotocol","f":"Free, keyless REST API (/v0/servers) — open catalog","p":"n/a","b":"Discover/list public MCP servers for agents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Pipedream Connect / MCP","u":"https://pipedream.com/docs/connect/mcp","co":"Pipedream","f":"Free tier; 3,000+ APIs / 10,000+ tools, managed auth","p":"Usage-based paid plans","b":"Managed tool/auth layer + MCP servers for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"RapidAPI Hub","u":"https://rapidapi.com/hub","co":"Rapidapi","f":"Free to browse + many APIs with free plans","p":"Varies per API (consumer pays publisher)","b":"Marketplace of 45k+ APIs to wire into agents","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ScraperAPI","u":"https://www.scraperapi.com/","co":"Scraperapi","f":"Free: 5,000 credits on signup, then 1,000/mo","p":"Hobby $49/mo (100k credits)","b":"Proxy-rotating scrape API for agent data feeds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Scrapybara","u":"https://scrapybara.com/","co":"Scrapybara","f":"Free: 10 compute hrs, 100 agent credits, 5 concurrent instances","p":"Credit top-ups $0.04 each (1 credit/agent step)","b":"Virtual desktops for computer-using AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SerpApi","u":"https://serpapi.com/","co":"Serpapi","f":"Free: 100 searches/mo, no card","p":"Developer $75/mo (5,000 searches)","b":"Structured Google/SERP results for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Serper","u":"https://serper.dev/","co":"Serper","f":"Free: 2,500 queries (valid 6 months), no card","p":"$50/mo Starter (~$1/1k queries)","b":"Fast cheap Google search grounding for LLMs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Skyvern","u":"https://www.skyvern.com/","co":"Skyvern","f":"Free: 1,000 credits/mo, 1 concurrent run (open source)","p":"Hobby $29/mo (30k credits, 10 concurrent)","b":"Open-source AI browser-automation agent via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Smithery","u":"https://smithery.ai/","co":"Smithery","f":"Free registry + Registry API to discover 2,000+ MCP servers","p":"Usage-based for hosted/remote servers","b":"MCP server registry + hosting for agent tools","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stagehand (Browserbase)","u":"https://docs.stagehand.dev/","co":"Stagehand","f":"Open-source MIT framework; runs on Browserbase free tier","p":"n/a (uses Browserbase compute)","b":"AI browser-automation framework (act/extract/observe)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Steel.dev","u":"https://steel.dev/","co":"Steel","f":"Free Hobby ~100 browser hrs/mo (also Apache-2.0 self-host)","p":"Starter $29/mo","b":"Open-source headless browser API for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tavily","u":"https://docs.tavily.com/","co":"Tavily","f":"Free: 1,000 API credits/mo, no card","p":"Pay-as-you-go $0.008/credit","b":"Agent-native web search + extract for RAG","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vercel Sandbox","u":"https://vercel.com/docs/sandbox","co":"Vercel","f":"Hobby: 5 CPU-hrs, 420 GB-hr memory, 5k creations/mo free","p":"$0.128/active-vCPU-hr + $0.0106/GB-hr memory","b":"Ephemeral Firecracker microVMs for agent/untrusted code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Zapier MCP","u":"https://zapier.com/mcp","co":"Zapier","f":"Free tier; 30,000+ actions across 9,000+ apps via MCP","p":"Zapier paid plans for higher task volume","b":"No-code tool actions for AI agents over MCP","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Agriculture & Food science","count":26,"entries":[{"n":"Edamam Food & Nutrition","u":"https://developer.edamam.com/food-database-api","co":"Edamam","f":"Free dev tier, limited calls/mo; key required","p":"~$49/mo","b":"NLP nutrition analysis, UPC & recipe data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPPO Data Portal","u":"https://data.eppo.int/apis/","co":"Eppo","f":"Free account + token; plant pest/host REST API","p":"n/a","b":"Plant pests, pathogens, hosts & EPPO codes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FAOSTAT (FAO Statistics API)","u":"https://faostatservices.fao.org/api/v1/en/","co":"FAO","f":"Free, keyless; global food & ag stats 1961-present","p":"n/a","b":"Global food & agriculture statistics, 245 countries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GBIF (Global Biodiversity Information Facility)","u":"https://techdocs.gbif.org/en/openapi/","co":"GBIF","f":"Free, keyless for search/species; account for downloads","p":"n/a","b":"Plant/species occurrence & taxonomy backbone","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Iowa Environmental Mesonet (IEM)","u":"https://mesonet.agron.iastate.edu/api/","co":"Iastate","f":"Free, keyless; ag weather, METAR, GIS/OGC services","p":"n/a","b":"Agricultural weather/climate & crop progress data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ISRIC SoilGrids","u":"https://rest.isric.org/soilgrids/v2.0/docs","co":"Isric","f":"Free, keyless; 5 calls/min fair use","p":"n/a","b":"Global gridded soil property estimates by point","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA POWER (Agroclimatology)","u":"https://power.larc.nasa.gov/api/pages/","co":"NASA","f":"Free, keyless; solar/meteorology for crop models","p":"n/a","b":"Global agroclimatology weather for crop modeling","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Nutritionix","u":"https://developer.nutritionix.com/","co":"Nutritionix","f":"Limited free (up to 2 active users); key required","p":"Enterprise (quote-based)","b":"Branded & restaurant food nutrition, NLP lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Food Facts","u":"https://openfoodfacts.github.io/openfoodfacts-server/api/","co":"Openfoodfacts","f":"Free, keyless (read); open data","p":"n/a","b":"Crowdsourced packaged food, barcodes, ingredients","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenEPI (Soil/Crop Health/Agriculture)","u":"https://developer.openepi.io/","co":"Openepi","f":"Free, open; soil, crop-health ML, ag aggregation","p":"n/a","b":"Soil props, crop disease detection, ag aggregation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenFarm","u":"https://github.com/openfarmcc/OpenFarm","co":"Openfarmcc","f":"Free, keyless; open crop-growing guides REST API","p":"n/a","b":"Open crop cultivation guides & growing data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Plant.id (Kindwise)","u":"https://web.plant.id/plant-identification-api/","co":"Plant","f":"Free trial credits; key required","p":"Pay-as-you-go / subscription","b":"Image-based plant species & disease identification","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Spoonacular","u":"https://spoonacular.com/food-api","co":"Spoonacular","f":"Free tier w/ daily point quota; key required","p":"~$29/mo","b":"Recipes, ingredients, meal planning, nutrition","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Trefle (Plants API)","u":"https://trefle.io/","co":"Trefle","f":"Free w/ token, beta (search endpoints flaky)","p":"n/a","b":"Botanical species data for gardening/farming apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USDA AMS My Market News (MARS API)","u":"https://mymarketnews.ams.usda.gov/mars-api/getting-started","co":"U.S. USDA","f":"Free w/ eAuth key (temp sample key available); JSON","p":"n/a","b":"US commodity prices: produce, livestock, dairy, grain","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA ARS GRIN-Global / GRIN Taxonomy","u":"https://www.ars-grin.gov/","co":"Ars grin","f":"Free, keyless public web/data access; germplasm & taxonomy","p":"n/a","b":"Plant germplasm accessions, varieties & taxonomy","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USDA CropScape / Cropland Data Layer","u":"https://nassgeodata.gmu.edu/CropScape/","co":"Gmu","f":"Free, keyless geospatial web services (GetCDLData/Stat)","p":"n/a","b":"US crop-specific land cover raster by region/year","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USDA ERS Data APIs (ARMS)","u":"https://www.ers.usda.gov/developer/data-apis","co":"U.S. USDA","f":"Free w/ api.data.gov key; JSON, attribute querying","p":"n/a","b":"Farm financial & resource management economics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA ESMIS API","u":"https://esmis.nal.usda.gov/api-documentation","co":"U.S. USDA","f":"Free w/ key; JSON access to USDA reports/releases","p":"n/a","b":"USDA crop/livestock report releases & metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA FAS OpenData (PSD/ESR/GATS)","u":"https://apps.fas.usda.gov/opendatawebv2/","co":"U.S. USDA","f":"Free w/ api.data.gov key; JSON","p":"n/a","b":"Global ag production, supply, export & trade data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA FoodData Central","u":"https://fdc.nal.usda.gov/api-guide/","co":"U.S. USDA","f":"Free w/ data.gov key, 1,000 req/hr (DEMO_KEY 30/hr)","p":"n/a","b":"Authoritative US food & nutrient composition data","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA FSIS Recall API","u":"https://www.fsis.usda.gov/science-data/developer-resources/recall-api","co":"U.S. USDA","f":"Free, keyless; JSON, attribute querying","p":"n/a","b":"Real-time meat/poultry food recalls & alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA NASS Quick Stats","u":"https://quickstats.nass.usda.gov/api","co":"U.S. USDA","f":"Free w/ key, JSON/XML/CSV, 50k rows/request cap","p":"n/a","b":"US crop, livestock & farm economics statistics","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA NRCS AWDB (SCAN/SNOTEL) REST API","u":"https://wcc.sc.egov.usda.gov/awdbRestApi/swagger-ui.html","co":"U.S. USDA","f":"Free, keyless web service; soil moisture, climate, snowpack","p":"n/a","b":"US soil moisture, climate & snowpack station data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA NRCS Web Soil Survey / spatial WMS-WFS","u":"https://www.nrcs.usda.gov/resources/data-and-reports/web-soil-survey","co":"U.S. USDA","f":"Free, keyless; soil survey data & spatial services","p":"n/a","b":"US soil survey maps & interpretive soil data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA Soil Data Access (NRCS SSURGO)","u":"https://sdmdataaccess.nrcs.usda.gov/","co":"U.S. USDA","f":"Free, keyless; SQL REST/POST, JSON/XML, WMS/WFS","p":"n/a","b":"US soil survey tabular & spatial (SSURGO) queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Air quality & environmental monitoring sensors","count":26,"entries":[{"n":"AirGradient","u":"https://api.airgradient.com/public/docs/api/v1/","co":"Airgradient","f":"Free w/ token for own devices; local device API keyless","p":"n/a","b":"Open-source DIY monitor cloud + local device API","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"AirNow API (US EPA)","u":"https://docs.airnowapi.org/","co":"Airnowapi","f":"Free w/ key, 500 req/hr per web service","p":"n/a","b":"Official US/Canada/Mexico real-time AQI and forecasts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ambee Air Quality API","u":"https://docs.ambeedata.com/apis/air-quality","co":"Ambeedata","f":"Free trial: ~100 records/day for 15 days","p":"Paid subscription plans","b":"Hyper-local AQ for 150+ countries, postal-code level","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Atmo France / Atmo Data","u":"https://www.atmo-france.org/article/les-donnees-air-disponibles","co":"Atmo france","f":"Free, keyless open API (ODbL license)","p":"n/a","b":"National French ATMO index + pollution episodes open data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Copernicus Atmosphere Monitoring Service (CAMS / ADS)","u":"https://ads.atmosphere.copernicus.eu/","co":"Copernicus","f":"Free w/ registration, CDS API (Python)","p":"n/a","b":"Global/European air quality analyses and forecasts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DEFRA UK-AIR Sensor Observation Service","u":"https://uk-air.defra.gov.uk/data/about_sos","co":"UK Government","f":"Free, keyless OGC SOS / REST (Open Government Licence)","p":"n/a","b":"UK government air pollution monitoring, machine-readable","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Air Quality System (AQS) API","u":"https://aqs.epa.gov/aqsweb/documents/data_api.html","co":"U.S. EPA","f":"Free w/ key (email registration)","p":"n/a","b":"Validated historical US regulatory monitor data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"EPA RadNet (Envirofacts API)","u":"https://www.epa.gov/radnet/radnet-near-real-time-air-data","co":"U.S. EPA","f":"Free, keyless (Envirofacts REST data service)","p":"n/a","b":"US near-real-time gamma radiation air monitors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EURDEP (EU Radiological Data Exchange Platform)","u":"https://remon.jrc.ec.europa.eu/About/Rad-Data-Exchange","co":"European Commission","f":"Free public viewer; bulk records via JRC open data catalogue (COLLECTION)","p":"n/a","b":"Near real-time European radiological monitoring network","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"European Environment Agency Air Quality Download Service","u":"https://www.eea.europa.eu/en/datahub/datahubitem-view/778ef9f5-6293-4846-badd-56a29c70880d","co":"European Union","f":"Free, keyless download web services (zipped Parquet)","p":"n/a","b":"Official EU member-state air quality timeseries (E1a/E2a)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Google Maps Platform Air Quality API","u":"https://developers.google.com/maps/documentation/air-quality","co":"Google","f":"Free monthly usage threshold (replaced $200 credit Feb 2025)","p":"Pay-as-you-go per-SKU (per 1000 requests)","b":"Global current/forecast/heatmap AQ (BreezoMeter-powered)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"IQAir AirVisual API","u":"https://api-docs.iqair.com/","co":"Iqair","f":"Free Community plan w/ key, 10,000 calls/mo","p":"Startup/Enterprise paid plans","b":"Global AQI + weather, city/station/geo lookups","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Meersens Environmental API","u":"https://partners.meersens.com/","co":"Meersens","f":"Free trial ~5000 calls / 14 days","p":"Paid subscription plans","b":"Real-time AQ + health index, 50m resolution, forecasts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA AERONET","u":"https://aeronet.gsfc.nasa.gov/new_web/data.html","co":"NASA","f":"Free, keyless web download tool / web services","p":"n/a","b":"Ground-based aerosol optical depth network, global","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA TEMPO (Earthdata ASDC)","u":"https://asdc.larc.nasa.gov/project/TEMPO","co":"NASA","f":"Free w/ Earthdata Login","p":"n/a","b":"Hourly satellite NO2/O3/HCHO over North America","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Open-Meteo Air Quality API","u":"https://open-meteo.com/en/docs/air-quality-api","co":"Open meteo","f":"Free, keyless (non-commercial, up to ~10k calls/day)","p":"From ~EUR29/mo commercial","b":"Keyless global pollutant + European pollen forecasts, CAMS-based","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAQ","u":"https://docs.openaq.org/","co":"Openaq","f":"Free w/ key (registration), generous open quota","p":"n/a","b":"World's largest open ground-level air quality aggregator","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"openSenseMap","u":"https://docs.opensensemap.org/","co":"Opensensemap","f":"Free, keyless open REST API (GeoJSON)","p":"n/a","b":"Citizen senseBox environmental sensor data, open API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenWeatherMap Air Pollution API","u":"https://openweathermap.org/api/air-pollution","co":"Openweathermap","f":"Free w/ key, ~1,000,000 calls/month (~60/min)","p":"Pay-as-you-call above free tier","b":"Current/forecast/historical pollutant concentrations + AQI","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PurpleAir API","u":"https://api.purpleair.com/","co":"Purpleair","f":"Free w/ key (Google SSO via develop.purpleair.com), points-based","p":"Paid points packages for high volume","b":"Crowdsourced low-cost PM sensor network, real-time","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Safecast","u":"https://api.safecast.org/","co":"Safecast","f":"Free, keyless open radiation dataset (CC0)","p":"n/a","b":"Largest open background radiation measurement dataset","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sensor.Community (formerly Luftdaten)","u":"https://github.com/opendata-stuttgart/meta/wiki/EN-APIs","co":"Opendata stuttgart","f":"Free, keyless public JSON API","p":"n/a","b":"Tens of thousands of DIY citizen PM sensor stations worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Smart Citizen","u":"https://developer.smartcitizen.me/","co":"Smartcitizen","f":"Free public REST API (read keyless; OAuth2/token for writes)","p":"n/a","b":"Citizen-science environmental sensor kit timeseries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"uRADMonitor","u":"https://www.uradmonitor.com/dashboard/","co":"Uradmonitor","f":"Free w/ account; cloud REST API (user ID + secret key)","p":"n/a","b":"Global radiation + air pollutant sensor nodes, 40+ countries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"World Air Quality Index (WAQI / aqicn)","u":"https://aqicn.org/api/","co":"Aqicn","f":"Free w/ token, ~1000 req/sec, non-commercial only","p":"n/a (commercial use & redistribution restricted)","b":"11000+ global stations, simple city/geo AQI feed + map tiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Clarity Movement","u":"https://api-guide.clarity.io/","co":"Clarity","f":"none (API key on request for deployment customers)","p":"Sensing-as-a-Service subscription","b":"Deployed low-cost ambient AQ sensor network data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Altmetrics & research impact","count":21,"entries":[{"n":"Altmetric API","u":"https://api.altmetric.com/","co":"Altmetric","f":"Free badges; research API","p":"Commercial","b":"Attention Score","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key","p":"Commercial","b":"OA full-text+cites","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless","p":"Plus","b":"DOI + citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless","p":"n/a","b":"Dataset DOI meta","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Dimensions Metrics API","u":"https://www.dimensions.ai/products/all-products/metrics-api/","co":"Dimensions","f":"Free non-commercial","p":"Analytics paid","b":"Citations, FCR/RCR","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Europe PMC API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Biomed citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Inciteful","u":"https://inciteful.xyz/","co":"Inciteful","f":"Free, open data","p":"n/a","b":"Citation networks","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Lens.org Scholarly API","u":"https://about.lens.org/lens-apis/","co":"Lens.org","f":"Free 5k/mo","p":"Paid","b":"Scholarly+patent cites","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NCBI E-utilities","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"PubMed meta","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIH iCite","u":"https://icite.od.nih.gov/api","co":"NIH","f":"Free, keyless","p":"n/a","b":"RCR PubMed","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/","co":"OpenAIRE","f":"Free, keyless","p":"n/a","b":"EU research graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless","p":"Premium","b":"Citations, h-index","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations","u":"https://opencitations.net/index/api/v2","co":"Opencitations","f":"Free, keyless","p":"n/a","b":"Citation links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ORCID Public API","u":"https://info.orcid.org/documentation/api-tutorials/","co":"ORCID","f":"Free w/ creds","p":"n/a","b":"Researcher profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Overton API","u":"https://help.overton.io/faq/","co":"Overton","f":"Free researcher on request","p":"Institutional","b":"Policy-doc citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"scite.ai API","u":"https://api.scite.ai/docs","co":"Scite","f":"Free personal; API paid","p":"$12-20/mo","b":"Smart citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Scopus API","u":"https://dev.elsevier.com/","co":"Elsevier","f":"Free key; data needs sub","p":"Scopus sub","b":"Cited-by, h-index","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Semantic Scholar API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free, keyless","p":"n/a","b":"Citation counts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free w/ email","p":"Feed","b":"OA status","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Wikimedia Analytics API","u":"https://doc.wikimedia.org/generated-data-platform/aqs/analytics-api/","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Pageview signal","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PlumX Metrics API","u":"https://dev.elsevier.com/documentation/PlumXMetricsAPI.wadl","co":"Elsevier","f":"none","p":"Scopus sub","b":"Captures, usage, social","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Anthropology & Archaeology","count":27,"entries":[{"n":"Archaeology Data Service (ADS) Linked Data","u":"https://data.archaeologydataservice.ac.uk/page/","co":"Archaeologydataservice","f":"Free, keyless SPARQL + RDF/Turtle (endpoint at /sparql)","p":"n/a","b":"UK archaeology archive metadata as linked open data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ARIADNE Research Infrastructure Portal","u":"https://www.ariadne-research-infrastructure.eu/portal/","co":"Ariadne research infrastructure","f":"Free, keyless catalog search; SPARQL endpoints","p":"n/a","b":"2M+ pan-European archaeological dataset records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"British Museum Collection (SPARQL/LOD)","u":"https://collection.britishmuseum.org/","co":"Britishmuseum","f":"Free, keyless SPARQL (CIDOC-CRM RDF)","p":"n/a","b":"Museum collection objects, antiquities, coins as linked data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"c14bazAAR (radiocarbon aggregator)","u":"https://docs.ropensci.org/c14bazAAR/","co":"Ropensci","f":"Free, open source R package; keyless","p":"n/a","b":"Querying/merging many open radiocarbon date databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CARD 2.0 (Canadian Archaeological Radiocarbon DB)","u":"https://www.canadianarchaeology.ca/","co":"Canadianarchaeology","f":"Free public search/download (location fuzzed); full access needs researcher account","p":"n/a","b":"North American archaeological radiocarbon dates","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"D-PLACE (Database of Places, Language, Culture, Environment)","u":"https://d-place.org/","co":"D place","f":"Free, keyless web API + open GitHub data (CC-BY-NC)","p":"n/a","b":"Cross-cultural ethnographic & environmental society data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Digital Public Library of America (DPLA)","u":"https://pro.dp.la/developers/api-codex","co":"Dp","f":"Free w/ key (request via email)","p":"n/a","b":"Aggregated US library/museum/archive heritage items","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DINAA (Digital Index of North American Archaeology)","u":"https://opencontext.org/projects/416a274c-cf88-4471-3e31-93db825e9e4a","co":"Opencontext","f":"Free, keyless via Open Context API","p":"n/a","b":"Aggregated US site records from state/federal agencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Europeana APIs","u":"https://pro.europeana.eu/page/apis","co":"Europeana","f":"Free w/ key; Search/Record/IIIF","p":"n/a","b":"European cultural heritage objects across thousands of institutions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Getty Vocabularies (AAT/TGN/ULAN)","u":"https://www.getty.edu/research/tools/vocabularies/lod/index.html","co":"Getty","f":"Free, keyless SPARQL + per-record JSON/RDF (ODC-By)","p":"n/a","b":"Art/architecture, place & artist controlled vocabularies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Harvard Art Museums API","u":"https://harvardartmuseums.org/collections/api","co":"Harvardartmuseums","f":"Free w/ key","p":"n/a","b":"Museum objects, people, exhibitions incl. ancient/anthropology","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Historic England Open Data Hub","u":"https://opendata-historicengland.hub.arcgis.com/","co":"Arcgis","f":"Free, keyless GeoServices/WMS/WFS, GeoJSON/CSV","p":"n/a","b":"England heritage listings, monuments, designations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"iDAI.gazetteer / iDAI.world (DAI)","u":"https://gazetteer.dainst.org/","co":"Dainst","f":"Free, keyless REST/JSON gazetteer of archaeological places","p":"n/a","b":"German Archaeological Institute place gazetteer & Arachne objects","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Neotoma Paleoecology Database","u":"https://api.neotomadb.org/api-docs/","co":"Neotomadb","f":"Free, keyless REST/OpenAPI","p":"n/a","b":"Multiproxy paleoecology, fossil & radiocarbon site data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Nomisma.org","u":"http://nomisma.org/documentation/apis/","co":"Nomisma","f":"Free, keyless REST + SPARQL endpoint","p":"n/a","b":"Ancient numismatics linked-data concepts and coins","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NPS National Register of Historic Places (NPGallery/NRHP)","u":"https://www.nps.gov/subjects/nationalregister/data-downloads.htm","co":"Nps","f":"Free, keyless bulk data; ArcGIS REST feature services","p":"n/a","b":"US historic/archaeological site designations & records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Context","u":"https://opencontext.org/about/services","co":"Opencontext","f":"Free, keyless","p":"n/a","b":"Published archaeology datasets, faceted search, JSON-LD/GeoJSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"p3k14c (PEOPLE 3000 Radiocarbon DB)","u":"https://www.p3k14c.org/download/","co":"P3k14c","f":"Free download (CSV via website/tDAR/GitHub); R package","p":"n/a","b":"170k+ global archaeological radiocarbon dates","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pelagios Network (LOD resources & Recogito)","u":"https://pelagios.org/lod/tools-resources","co":"Pelagios","f":"Free, keyless LOD datasets/tools","p":"n/a","b":"Linking ancient-world data via shared place references","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PeriodO (Periods, Organized)","u":"https://perio.do/en/","co":"Perio","f":"Free, keyless; public-domain JSON-LD","p":"n/a","b":"Scholarly historical/archaeological period definitions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Pleiades (Ancient Places Gazetteer)","u":"https://pleiades.stoa.org/","co":"Stoa","f":"Free, keyless; bulk CSV/GeoJSON/RDF exports","p":"n/a","b":"Gazetteer of 36k+ ancient Greco-Roman places","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Portable Antiquities Scheme (finds.org.uk)","u":"https://finds.org.uk/database","co":"Finds","f":"Free, keyless; JSON/XML/CSV/KML","p":"n/a","b":"1M+ UK public archaeological finds records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Smithsonian Open Access API","u":"https://www.si.edu/openaccess/devtools","co":"Si","f":"Free w/ key (api.data.gov); CC0 metadata","p":"n/a","b":"Anthropology & natural history collection objects","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"tDAR (The Digital Archaeological Record)","u":"https://core.tdar.org/","co":"Tdar","f":"Free public metadata; API via R package (bocinsky/tdar)","p":"Resource hosting/curation fees for depositors","b":"Repository of US archaeological docs, datasets, GIS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wikidata Query Service (SPARQL)","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless SPARQL endpoint","p":"n/a","b":"Archaeological sites, cultures, artifacts as structured linked data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Historical Gazetteer","u":"https://docs.whgazetteer.org/","co":"Whgazetteer","f":"Free; Reconciliation API keyless, some Entity/upload endpoints need an API token","p":"n/a","b":"2.2M+ historical places linked across time/language","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"eHRAF World Cultures (HRAF)","u":"https://hraf.yale.edu/products/ehraf-world-cultures/","co":"Yale","f":"none (subscription; some trial/research access)","p":"Institutional subscription (contact HRAF)","b":"Indexed ethnographic texts across 330+ world cultures","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Autonomous agent projects","count":23,"entries":[{"n":"AgentGPT (Reworkd)","u":"https://github.com/reworkd/AgentGPT","co":"Reworkd","f":"Open-source (GPL-3.0, repo archived Jan 28 2026); hosted site limited, BYO OpenAI key","p":"n/a (project no longer maintained)","b":"Browser-based no-code autonomous agent deployment (legacy)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AgentOps (agent observability/monitoring API)","u":"https://docs.agentops.ai/","co":"Agentops","f":"Free Basic plan up to 5,000 events/month; API key required","p":"Pro $40/month; Enterprise custom","b":"Tracing, cost tracking, session replay for agent frameworks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AutoGPT (Significant Gravitas core repo)","u":"https://github.com/Significant-Gravitas/AutoGPT","co":"AutoGPT","f":"Free, open-source; self-host classic + platform; BYO model keys","p":"n/a (framework); hosted cloud is separate paid offering","b":"Original autonomous GPT agent + low-code agent builder platform","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AutoGPT Platform Store & Public API (Significant Gravitas)","u":"https://docs.agpt.co/","co":"Agpt","f":"Open-source self-host free (BYO model keys); public Store API endpoints; OpenAPI spec","p":"Hosted cloud is paid (prepaid credit wallet + Pro/Max subscription)","b":"Agent marketplace discovery and self-hosted agent workflows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BabyAGI (Yohei Nakajima)","u":"https://github.com/yoheinakajima/babyagi","co":"BabyAGI","f":"Free, open-source; Python task-loop; BYO OpenAI/vector-DB keys","p":"n/a (experimental framework, not for production)","b":"Minimal task-creation/prioritization autonomous agent loop","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"BabyAGI 2o (self-building agent)","u":"https://github.com/yoheinakajima/babyagi-2o","co":"BabyAGI","f":"Free, open-source experimental; uses litellm; BYO LLM key","p":"n/a (experimental)","b":"Simplest self-building agent that registers its own tools","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CAMEL-AI (camel framework)","u":"https://docs.camel-ai.org/","co":"Camel ai","f":"Free, open-source (Apache-2.0); pip install camel-ai; BYO LLM key","p":"n/a (framework); LLM provider usage is paid","b":"Role-playing communicative agents, synthetic data, simulations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CAMEL-AI OASIS (social simulation)","u":"https://github.com/camel-ai/oasis","co":"CAMEL-AI","f":"Free, open-source; simulate up to ~1M social-media agents; BYO LLM key","p":"n/a (framework); LLM usage paid","b":"Large-scale social media agent interaction simulations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CrewAI","u":"https://github.com/crewAIInc/crewAI","co":"CrewAI","f":"Free, open-source (MIT); pip install crewai; BYO LLM key","p":"CrewAI Enterprise/AMP hosted platform is paid (custom)","b":"Role-based multi-agent crews for collaborative task workflows","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"E2B (code-execution sandbox cloud for agents)","u":"https://e2b.dev/docs","co":"E2b","f":"Free Hobby tier: one-time $100 credit, 1-hour sessions, 20 concurrent sandboxes, no card; API key required","p":"Pro $150/month (24h sessions); billed per running-sandbox second","b":"Secure cloud sandboxes to run AI-generated agent code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Eigent (CAMEL-AI multi-agent desktop platform)","u":"https://github.com/eigent-ai/eigent","co":"Eigent ai","f":"Free, open-source (Apache-2.0); local-first desktop app; BYO keys","p":"n/a (local-first/open-source)","b":"Local multi-agent 'AI workforce' built on CAMEL-AI","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GitHub REST API (source/repo data)","u":"https://docs.github.com/en/rest","co":"En","f":"Free; 60 req/hr unauthenticated, 5,000 req/hr with token","p":"n/a (free with account)","b":"Repo stars/releases/issues for AutoGPT, MetaGPT, OpenHands, etc.","s":"In use","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LangGraph (LangChain)","u":"https://langchain-ai.github.io/langgraph/","co":"LangChain","f":"Free, open-source (MIT); graph-based agent runtime; BYO LLM key","p":"LangGraph Platform hosted deployment is paid (usage-based)","b":"Stateful graph-based agent workflows with durability","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LangSmith (LangChain observability)","u":"https://docs.smith.langchain.com/","co":"LangChain","f":"Free Developer plan (1 seat, 5k traces/mo); API key required","p":"Plus $39/seat/month; usage-based traces beyond included","b":"Tracing/eval/monitoring for LLM agents and chains","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Letta (formerly MemGPT)","u":"https://github.com/letta-ai/letta","co":"Letta ai","f":"Free, open-source (Apache-2.0); self-host server with REST API; BYO LLM key","p":"Letta Cloud hosted is paid (usage-based)","b":"Stateful agents with long-term memory and REST API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MetaGPT (FoundationAgents / DeepWisdom)","u":"https://github.com/FoundationAgents/MetaGPT","co":"FoundationAgents","f":"Free, open-source (MIT); pip install metagpt; BYO LLM key","p":"n/a (framework); underlying LLM API is paid","b":"Multi-agent software company: requirement to PRD/design/code","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MetaGPT-adjacent: SuperAGI (TransformerOptimus framework)","u":"https://github.com/TransformerOptimus/SuperAGI","co":"TransformerOptimus","f":"Free, open-source (MIT); self-host via Docker, GUI at localhost:3000; BYO keys","p":"SuperAGI Cloud is credit-based paid SaaS (app.superagi.com)","b":"Self-hosted concurrent autonomous agents with GUI + tools","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft AutoGen / Agent Framework","u":"https://github.com/microsoft/autogen","co":"Microsoft","f":"Free, open-source (MIT); conversational multi-agent; BYO LLM key","p":"n/a (framework); LLM API usage is paid","b":"Conversational/group-chat multi-agent collaboration and debate","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenAI Agents SDK","u":"https://openai.github.io/openai-agents-python/","co":"OpenAI","f":"SDK is free/open-source (MIT); runs against paid OpenAI API; free tracing dashboard","p":"Pay-per-token via OpenAI API (model-dependent)","b":"Production multi-agent orchestration, handoffs, guardrails, tracing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAI Swarm (educational multi-agent framework)","u":"https://github.com/openai/swarm","co":"OpenAI","f":"Free, open-source (MIT); pip-installable; needs OpenAI API key to run","p":"n/a (framework); OpenAI API usage is paid","b":"Lightweight agent handoff/routine experimentation (superseded by Agents SDK)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenHands Cloud API (All Hands AI, formerly OpenDevin)","u":"https://docs.openhands.dev/openhands/usage/cloud/cloud-api","co":"Openhands","f":"Free Individual tier (BYOK, limited daily/parallel conversations); API key required","p":"Pay-as-you-go LLM credits + paid org tiers for Cloud API access","b":"Programmatically launching autonomous coding agents on repos","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenHands SDK / core repo (All Hands AI)","u":"https://github.com/All-Hands-AI/OpenHands","co":"All Hands AI","f":"Free, open-source (MIT); self-host full stack with REST API + React UI","p":"n/a (self-host free); managed Cloud is paid","b":"Self-hosted AI software-development agent with REST API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PyPI (package registry)","u":"https://warehouse.pypa.io/api-reference/","co":"Pypa","f":"Free, keyless JSON API (metadata for metagpt, camel-ai, crewai, etc.)","p":"n/a","b":"Querying versions/metadata of Python agent packages","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Aviation & air traffic","count":27,"entries":[{"n":"AeroDataBox API","u":"https://aerodatabox.com/","co":"Aerodatabox","f":"Low-cost entry tier via RapidAPI / API.market (small monthly call allotment)","p":"~$5/mo (a few thousand calls)","b":"Flights, schedules, airport & aircraft data for small apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AirLabs Data API","u":"https://airlabs.co/","co":"Airlabs","f":"Free plan ~1,000 queries; live flights, schedules, airports, airlines, routes","p":"$19 per 10,000 queries (real-time flights)","b":"Affordable live flight tracking + schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"airportdb.io","u":"https://airportdb.io/","co":"Airportdb","f":"Free w/ token; ~60k airports with runways, frequencies, navaids by ICAO","p":"n/a","b":"Per-airport JSON lookup by ICAO code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Amadeus for Developers (Flight APIs)","u":"https://developers.amadeus.com/self-service/category/flights","co":"Amadeus","f":"Free Self-Service test tier w/ key (monthly quota); flight status, schedules, search","p":"pay-as-you-go in production (free quota retained)","b":"Flight status, schedules, search & booking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Aviation Edge","u":"https://aviation-edge.com/","co":"Aviation edge","f":"Free trial API available (limited); flight tracker, schedules, routes","p":"~$99/mo (30,000 calls)","b":"Flight tracking, schedules, routes, autocomplete","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AviationAPI","u":"https://docs.aviationapi.com/","co":"Aviationapi","f":"Free, keyless; FAA charts/d-TPP, airport info, preferred routes, METAR, VATSIM, weather","p":"n/a","b":"Free keyless FAA aeronautical data (charts, airports, routes)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AviationStack","u":"https://aviationstack.com/","co":"Aviationstack","f":"Free plan 100 req/mo; real-time flight status","p":"$49.99/mo (10,000 req)","b":"Real-time/historical flight status & schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AviationWeather.gov Data API (NWS/AWC)","u":"https://aviationweather.gov/data/api/","co":"NWS (NOAA)","f":"Free, keyless; METAR, TAF, PIREP, AIRMET/SIGMET, station info (100 req/min)","p":"n/a","b":"Official US aviation weather, METAR/TAF in JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"AVWX REST API","u":"https://info.avwx.rest/","co":"Avwx","f":"Free tier (token) for basic METAR/TAF parsing","p":"paid hobby/pro/enterprise tiers","b":"Parsed METAR/TAF + station data (JSON/XML/YAML)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CheckWX Aviation Weather API","u":"https://www.checkwxapi.com/","co":"Checkwxapi","f":"Free w/ key, 3,000 req/day, no card; decoded METAR/TAF/station JSON","p":"paid upgrade tiers","b":"Clean decoded METAR/TAF in JSON","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cirium (FlightStats) Flex APIs","u":"https://developer.cirium.com/apis/flightstats-apis/schedules","co":"Cirium","f":"Free 30-day Evaluation plan, limited transactions","p":"subscription (contact sales)","b":"Airline schedules, flight status, ratings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EUROCONTROL Aviation Data for Research (R&D archive)","u":"https://www.eurocontrol.int/dashboard/aviation-data-research","co":"Eurocontrol","f":"Free for non-commercial/R&D via OneSky portal; European traffic, delays, flight archives","p":"n/a (non-commercial use; attribution required)","b":"European air-traffic, delay & flight research datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FAA ASWS (Airport Status Web Service)","u":"https://app.swaggerhub.com/apis/FAA/ASWS/1.1.0","co":"Federal Aviation Administration","f":"Free, keyless; US airport delays, ground stops, status (also at nasstatus.faa.gov/api/airport-status-information)","p":"n/a","b":"Real-time US airport delays & ground stops","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FAA Data Portal / API (data.faa.gov, api.faa.gov)","u":"https://www.faa.gov/data","co":"FAA","f":"Many open datasets keyless (ADDS: CSV/JSON/KML/Shapefile); web services via api.faa.gov need a free API key","p":"n/a","b":"FAA datasets clearinghouse, SWIM-derived feeds","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"FAA Federal NOTAM System / SWIM FNS","u":"https://notams.aim.faa.gov/notamSearch/","co":"FAA","f":"Free public NOTAM search portal; SWIM FNS real-time feed needs SCDS/SWIM account","p":"n/a (gov; registration for feed)","b":"Official US NOTAMs (search + SWIM real-time feed)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FAA NASR Subscription (28-day)","u":"https://www.faa.gov/air_traffic/flight_info/aeronav/aero_data/NASR_Subscription/","co":"FAA","f":"Free, keyless bulk downloads (AIXM 5.1 + CSV); 28-day effective cycles","p":"n/a","b":"Authoritative US airspace/airport/navaid reference data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FlightAware AeroAPI","u":"https://www.flightaware.com/commercial/aeroapi","co":"Flightaware","f":"Personal tier with $5/mo usage credit ($10 for ADS-B feeders); current status only","p":"$100/mo (Standard) + per-query fees","b":"High-quality flight tracking, status, alerts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Flightradar24 API (official)","u":"https://fr24api.flightradar24.com/","co":"Flightradar24","f":"Free Sandbox API key (static test data, no credits used)","p":"Explorer ~$9/mo (credit-based)","b":"Live positions, historical tracks, airline/airport data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"goflightlabs (FlightLabs)","u":"https://www.goflightlabs.com/","co":"Goflightlabs","f":"7-day free trial w/ key (~50 requests, Starter features)","p":"$249.99/mo (Starter, 4,000 calls)","b":"Real-time flight tracker, status, schedules, routes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"hexdb.io (Mode-S / ICAO hex API)","u":"https://hexdb.io/","co":"Hexdb","f":"Free, keyless (rate-limited); aircraft by ICAO24 hex, registration, route, airport lookup","p":"n/a (donation-supported)","b":"Resolve ADS-B hex codes to aircraft/route info","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ICAO API Data Service","u":"https://www.icao.int/safety/istars/pages/api-data-service.aspx","co":"Icao","f":"100 free trial calls on registration; ICAO airport/airline/aircraft codes, NOTAMs, safety/accident data","p":"subscription (3 plan tiers; contact ICAO)","b":"Official ICAO codes, safety & accident statistics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenFlights data","u":"https://openflights.org/data.php","co":"Openflights","f":"Free, keyless CSV/dat (airports, airlines, routes, planes); ODbL","p":"n/a (commercial license ~$100 flat)","b":"Airport/airline/route reference data, mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenSky Network API","u":"https://openskynetwork.github.io/opensky-api/rest.html","co":"Openskynetwork","f":"Free; anonymous ~400 credits/day/endpoint (keyless), registered via OAuth2 ~4,000/day; non-commercial","p":"n/a (contact for commercial)","b":"Live ADS-B state vectors, flights, tracks for research","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OurAirports (open data)","u":"https://ourairports.com/data/","co":"Ourairports","f":"Free, keyless public-domain CSV (airports, runways, frequencies, navaids); nightly updates","p":"n/a","b":"Global airport/runway/frequency reference dataset","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Schiphol Public Flight API","u":"https://developer.schiphol.nl/","co":"Schiphol","f":"Free w/ app_id/app_key; AMS flights, destinations, airlines, aircraft types","p":"n/a (commercial/non-public APIs incur cost)","b":"Amsterdam Schiphol flight/airport data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ADS-B Exchange API (RapidAPI)","u":"https://rapidapi.com/adsbx/api/adsbexchange-com1/","co":"Rapidapi","f":"none (feeders get data access; or RapidAPI subscription)","p":"$10/mo (10,000 req) via RapidAPI","b":"Unfiltered/military-included live ADS-B positions","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"OAG Flight Info API","u":"https://www.oag.com/flight-info-api","co":"Oag","f":"none (developer-portal trial on request at developers.oag.com)","p":"subscription (contact sales)","b":"Authoritative airline schedules & status","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Bibliographic & citation APIs","count":25,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/user-manual.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"Preprint metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BASE API","u":"https://www.base-search.net/about/en/about_develop.php","co":"Base search","f":"Free academic (IP allowlist)","p":"Commercial by agreement","b":"OA repos 400M+ docs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"bioRxiv/medRxiv API","u":"https://api.biorxiv.org/","co":"bioRxiv","f":"Free, keyless","p":"n/a","b":"Preprint metadata/status","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key","p":"Commercial pricing","b":"OA full-text 430M+","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless","p":"Metadata Plus","b":"DOI metadata 150M+ records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless reads","p":"Membership for DOIs","b":"DOI metadata for datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DBLP","u":"https://dblp.org/faq/13501473.html","co":"Dblp","f":"Free, keyless; CC0","p":"n/a","b":"CS bibliography","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Dimensions API","u":"https://docs.dimensions.ai/dsl/","co":"Dimensions","f":"Free for eligible research","p":"Commercial subscription","b":"Pubs/grants/patents via DSL","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DOAJ API","u":"https://doaj.org/api/v3/docs","co":"DOAJ","f":"Free, keyless; CC0","p":"n/a","b":"Open-access journals","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Europe PMC API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Life-sciences literature","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Fatcat / IA Scholar","u":"https://api.fatcat.wiki/","co":"Fatcat","f":"Free, keyless; CC0","p":"n/a","b":"Catalog of 240M+ works","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HathiTrust Bib API","u":"https://www.hathitrust.org/data/bib-api/","co":"Hathitrust","f":"Free, keyless","p":"n/a","b":"Metadata 17M+ volumes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Lens.org API","u":"https://docs.api.lens.org/","co":"Lens.org","f":"Free 5k req/5M records/mo","p":"Institutional plans","b":"Scholarly + patent search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NCBI E-utilities","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free 3/sec; key 10/sec","p":"n/a","b":"PubMed/PMC metadata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/","co":"OpenAIRE","f":"Free, keyless","p":"n/a","b":"EU research graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless; 100k/day","p":"Premium ~$10k/yr","b":"250M+ works/authors/citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations API","u":"https://opencitations.net/index/api/v2","co":"Opencitations","f":"Free, keyless; 180/min","p":"n/a","b":"DOI-to-DOI citation links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ORCID Public API","u":"https://info.orcid.org/documentation/","co":"ORCID","f":"Free w/ OAuth","p":"Member API","b":"Researcher IDs/profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"PMC OAI-PMH API","u":"https://pmc.ncbi.nlm.nih.gov/tools/oai/","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Harvest OA biomedical full-text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ROR API","u":"https://ror.readme.io/","co":"Readme","f":"Free, keyless; CC0","p":"n/a","b":"Research org IDs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"scite.ai API","u":"https://api.scite.ai/docs","co":"Scite","f":"Limited free; key required","p":"Paid subscription","b":"Smart citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Scopus API","u":"https://dev.elsevier.com/sc_apis.html","co":"Elsevier","f":"Free w/ key academic","p":"Commercial subscription","b":"Abstracts/citations/metrics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Semantic Scholar API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free, keyless; key for limits","p":"n/a","b":"Papers, authors, citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free, keyless w/ email","p":"Data feed","b":"OA full-text for DOI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Web of Science Starter API","u":"https://developer.clarivate.com/apis/wos-starter","co":"Clarivate","f":"Free w/ key, 50/day","p":"Subscriber to 20k/day","b":"WoS Core Collection","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Biological & Biomedical sciences","count":31,"entries":[{"n":"Alliance of Genome Resources API","u":"https://www.alliancegenome.org/swagger-ui/","co":"Alliancegenome","f":"Free, keyless (public GET endpoints)","p":"n/a","b":"Harmonized model-organism genes, alleles, disease","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AlphaFold Protein Structure DB API","u":"https://alphafold.ebi.ac.uk/api-docs","co":"EMBL-EBI","f":"Free, keyless (keyed on UniProt accession)","p":"n/a","b":"Predicted protein 3D structures, 200M+ entries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Bgee Gene Expression API","u":"https://www.bgee.org/support/api","co":"Bgee","f":"Free, keyless","p":"n/a","b":"Curated cross-species gene expression in healthy tissues","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ChEMBL Data Web Services","u":"https://chembl.gitbook.io/chembl-interface-documentation/web-services/chembl-data-web-services","co":"Gitbook","f":"Free, keyless","p":"n/a","b":"Bioactivity, drug targets, assays, medicinal chemistry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless","p":"n/a","b":"Clinical trial registry records, conditions, interventions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EBI Ontology Lookup Service (OLS) API","u":"https://www.ebi.ac.uk/ols4/help","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Biomedical ontology term search (GO, HPO, MONDO, etc.)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EBI Search API (EMBL-EBI)","u":"https://www.ebi.ac.uk/ebisearch/swagger.ebi","co":"EMBL-EBI","f":"Free, keyless (cross-resource search-as-a-service)","p":"n/a","b":"Unified text search across EMBL-EBI bio databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EMBL-EBI Job Dispatcher (sequence tools)","u":"https://www.ebi.ac.uk/jdispatcher/docs/webservices/","co":"EMBL-EBI","f":"Free, keyless (email param required)","p":"n/a","b":"BLAST, Clustal, HMMER and other sequence analysis jobs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EMBL-EBI Proteins API","u":"https://www.ebi.ac.uk/proteins/api/doc/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"UniProt features, variants, proteomics mapped to proteins","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ensembl REST API","u":"https://rest.ensembl.org/","co":"Ensembl","f":"Free, keyless (rate-limited ~15 req/s)","p":"n/a","b":"Vertebrate genomes, genes, variants, VEP, sequence","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"European Nucleotide Archive (ENA) API","u":"https://ena-docs.readthedocs.io/en/latest/retrieval/programmatic-access.html","co":"Readthedocs","f":"Free, keyless (Browser + Portal API)","p":"n/a","b":"DNA/RNA sequence records, reads, assemblies, taxonomy","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GWAS Catalog REST API (EBI/NHGRI)","u":"https://www.ebi.ac.uk/gwas/rest/docs/api","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Published genome-wide association study trait-variant data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Human Protein Atlas","u":"https://www.proteinatlas.org/about/help/dataaccess","co":"Proteinatlas","f":"Free, keyless (per-entry XML/RDF/TSV, bulk TSV)","p":"n/a","b":"Protein tissue, subcellular, pathology expression","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"InterPro API (EMBL-EBI)","u":"https://interpro-documentation.readthedocs.io/en/latest/","co":"Readthedocs","f":"Free, keyless","p":"n/a","b":"Protein families, domains, functional site signatures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"KEGG REST API","u":"https://www.kegg.jp/kegg/rest/keggapi.html","co":"Kegg","f":"Free, keyless for academic/non-commercial use","p":"Commercial license via subscription","b":"Pathways, KO orthology, genes, compounds linking","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Mouse Genome Informatics (MGI / MouseMine)","u":"https://www.mousemine.org/mousemine/","co":"Mousemine","f":"Free, keyless (InterMine web service)","p":"n/a","b":"Mouse genes, phenotypes, expression, disease models","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyGene.info (BioThings)","u":"https://docs.mygene.info/","co":"Mygene","f":"Free, keyless (batch via POST)","p":"n/a","b":"Gene annotation lookup across IDs and species","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyVariant.info (BioThings)","u":"https://docs.myvariant.info/","co":"Myvariant","f":"Free, keyless (batch via POST)","p":"n/a","b":"Variant annotation from ClinVar, dbSNP, gnomAD","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NCBI Entrez E-utilities","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s); free API key raises to 10 req/s","p":"n/a","b":"Querying PubMed, Gene, Nucleotide, Protein Entrez databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Targets Platform GraphQL API","u":"https://platform-docs.opentargets.org/data-access/graphql-api","co":"Opentargets","f":"Free, keyless (GraphQL)","p":"n/a","b":"Target-disease associations, drug discovery evidence","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PRIDE Archive REST API (EMBL-EBI)","u":"https://www.ebi.ac.uk/pride/ws/archive/v2/webjars/swagger-ui/index.html","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Mass-spectrometry proteomics datasets and submissions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubChem PUG-REST","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (5 req/s)","p":"n/a","b":"Chemical compounds, substances, bioassay results","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"QuickGO API (EMBL-EBI / GOA)","u":"https://www.ebi.ac.uk/QuickGO/api/index.html","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Gene Ontology terms and GO annotations querying","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Rat Genome Database (RGD) REST API","u":"https://rest.rgd.mcw.edu/rgdws/","co":"Mcw","f":"Free, keyless (100+ operations)","p":"n/a","b":"Rat and multi-species genes, disease, phenotype, QTL","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RCSB PDB Data/Search API","u":"https://data.rcsb.org/","co":"RCSB PDB","f":"Free, keyless (REST + GraphQL)","p":"n/a","b":"3D macromolecular structures, search and metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Reactome Content & Analysis Service","u":"https://reactome.org/dev/content-service","co":"Reactome","f":"Free, keyless (open-source)","p":"n/a","b":"Curated biological pathways, enrichment analysis","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Saccharomyces Genome Database (YeastMine)","u":"https://yeastmine.yeastgenome.org/yeastmine/","co":"Yeastgenome","f":"Free, keyless (InterMine web service); SGD REST also free","p":"n/a","b":"Budding yeast genes, regulation, protein abundance","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"STRING database API","u":"https://string-db.org/help/api/","co":"String db","f":"Free, keyless for academic use (HTTP REST)","p":"Commercial license required for for-profit use","b":"Protein-protein interaction networks, enrichment","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCSC Genome Browser REST API","u":"https://genome.ucsc.edu/goldenpath/help/api.html","co":"Ucsc","f":"Free, keyless (JSON track/sequence data)","p":"n/a","b":"Genome assembly track data and sequence retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UniProt REST API","u":"https://www.uniprot.org/api-documentation","co":"UniProt","f":"Free, keyless, no auth","p":"n/a","b":"Protein sequences, function annotations, ID mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WormBase REST API","u":"https://wormbase.org/about/wormbase_api","co":"Wormbase","f":"Free, keyless","p":"n/a","b":"C. elegans and nematode genes, genomes, phenotypes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Biomedical literature","count":25,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/basics.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"Preprint metadata incl. quantitative-biology and bio-adjacent fields","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"bioRxiv / medRxiv API","u":"https://api.biorxiv.org/","co":"bioRxiv","f":"Free, keyless","p":"n/a","b":"Biology and medicine preprint metadata, published-link tracking","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless (REST/JSON)","p":"n/a","b":"Clinical study records, sponsors, conditions, results data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key (registration required)","p":"Paid tiers for higher limits","b":"Largest aggregator of OA full-text papers and metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (email for polite pool)","p":"Metadata Plus (paid tier)","b":"DOI-keyed scholarly metadata, references, funding info","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Dimensions Analytics API","u":"https://docs.dimensions.ai/dsl/api.html","co":"Dimensions","f":"Free for non-commercial scientometric research (on application)","p":"Commercial subscription","b":"Linked pubs, grants, patents, clinical trials, policy docs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DOAJ API","u":"https://doaj.org/api/v4/docs","co":"DOAJ","f":"Free, keyless (key for write ops); 2 req/s","p":"n/a","b":"Open-access journal and article metadata directory","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Europe PMC Annotations API (SciLite)","u":"https://europepmc.org/AnnotationsApi","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Retrieve text-mined annotations across Europe PMC articles","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Europe PMC RESTful Web Service","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Search 40M+ biomedical pubs, full text, citations, text-mined terms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Lens.org Scholar API","u":"https://docs.api.lens.org/","co":"Lens.org","f":"Free trial/academic access on request","p":"Paid commercial plans","b":"200M+ scholarly records linked to patent citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"LitCovid (NCBI)","u":"https://www.ncbi.nlm.nih.gov/research/coronavirus/","co":"NCBI (NIH)","f":"Free, keyless (JSON API)","p":"n/a","b":"Curated, topic-categorized COVID-19 literature hub","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NCBI E-utilities (Entrez)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25497/","co":"NCBI (NIH)","f":"Free; 3 req/s keyless, 10 req/s w/ free key","p":"n/a","b":"Programmatic PubMed/PMC search, fetch, link across NCBI DBs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIH RePORTER API","u":"https://api.reporter.nih.gov/","co":"NIH RePORTER","f":"Free, keyless (v2 REST)","p":"n/a","b":"NIH-funded projects linked to resulting publications/patents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/graph-api/","co":"OpenAIRE","f":"Free, keyless (registered token raises limits)","p":"n/a","b":"EU research graph: pubs, datasets, projects, funding links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex","u":"https://developers.openalex.org/","co":"OpenAlex","f":"Free, keyless (polite pool via email)","p":"Premium plan (contact sales)","b":"250M+ scholarly works, authors, citations; Scopus alternative","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations REST API","u":"https://opencitations.net/querying/","co":"Opencitations","f":"Free, keyless; 180 req/min","p":"n/a","b":"Open citation links and bibliographic metadata by DOI/PMID","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PLOS Search/TDM API","u":"https://api.plos.org/","co":"Plos","f":"Free, keyless","p":"n/a","b":"PLOS full-text JATS XML and metadata for text mining","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PMC OAI-PMH Service","u":"https://pmc.ncbi.nlm.nih.gov/tools/oai/","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Harvest PMC metadata and OA-subset full-text JATS XML","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubMed (via E-utilities / NLM)","u":"https://www.ncbi.nlm.nih.gov/home/develop/api/","co":"NCBI (NIH)","f":"Free, keyless (key raises rate limit)","p":"n/a","b":"MEDLINE citations and abstracts, the canonical biomedical index","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubTator3 API (NCBI)","u":"https://www.ncbi.nlm.nih.gov/research/pubtator3/api","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Text-mined gene/disease/chemical/variant annotations on PubMed/PMC","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"scite.ai API","u":"https://api.scite.ai/docs","co":"Scite","f":"Free tier limited; full access via subscription/token","p":"Subscription / custom API plans","b":"Smart Citations: supporting/contrasting citation context","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free, keyless; free key raises rate limits","p":"n/a","b":"Paper/author graph, citations, TLDRs, recommendations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Springer Nature Open Access API","u":"https://dev.springernature.com/docs/api-endpoints/open-access/","co":"Springernature","f":"Free w/ key (registration)","p":"Premium plan (contact)","b":"Metadata/full text for BioMed Central + SpringerOpen OA articles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UMLS Terminology Services REST API (NLM)","u":"https://documentation.uts.nlm.nih.gov/rest/home.html","co":"NLM (NIH)","f":"Free w/ UMLS license + API key","p":"n/a","b":"Map biomedical concepts/terminologies (MeSH, SNOMED, etc.)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free w/ email; 100k calls/day","p":"Data feed / snapshot (paid for bulk)","b":"Find legal open-access full text for any DOI","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"}]},{"category":"Browser automation & computer-use agent tooling","count":29,"entries":[{"n":"Anchor Browser","u":"https://anchorbrowser.io/","co":"Anchorbrowser","f":"Free $5 credits/mo for exploration","p":"$50/mo (Starter); Verified Agents add-on from $20/mo","b":"Authenticated/secure cloud browser for computer-use agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Apify","u":"https://apify.com/","co":"Apify","f":"Free permanent: $5 platform credit/mo, no card","p":"$29/mo (Starter)","b":"Serverless Actors for scraping/browser automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"browser-use","u":"https://github.com/browser-use/browser-use","co":"Browser use","f":"Free, open source (MIT); bring your own LLM key","p":"Hosted Cloud free to start; usage from ~$0.02/browser-hr","b":"Python LLM-driven browser agent for web tasks","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Browserbase","u":"https://www.browserbase.com/","co":"Browserbase","f":"Free tier: 1 browser hour, 1 concurrent session","p":"$20/mo (Agent Mode / Hobby)","b":"Managed cloud headless browsers for AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Browserless.io","u":"https://www.browserless.io/","co":"Browserless","f":"Free tier: 1k units/mo, 2 concurrent, captcha solving","p":"$25/mo (Prototyping, billed annually)","b":"Hosted Chrome/CDP automation + BrowserQL","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BrowserStack Automate","u":"https://www.browserstack.com/automate","co":"Browserstack","f":"Free trial: 100 automated test min; free for approved OSS","p":"From ~$12.50/mo (web testing, annual); Automate higher","b":"Cloud Selenium/Playwright grid, 3500+ real browsers/devices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Crawl4AI","u":"https://github.com/unclecode/crawl4ai","co":"Unclecode","f":"Free, open source (Apache-2.0); self-hosted, no API key","p":"n/a (optional Crawl4AI Cloud)","b":"Self-hosted LLM-ready crawling/scraping for RAG","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Daytona","u":"https://www.daytona.io/","co":"Daytona","f":"Free: $200 compute credit + 5GB storage; OSS core (AGPL-3.0)","p":"Usage-based (per-second) cloud","b":"Sub-90ms dev sandboxes for AI agents (GPU avail)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"E2B","u":"https://e2b.dev/","co":"E2b","f":"Free Hobby: one-time $100 credit, 20 concurrent sandboxes","p":"Pro $150/mo","b":"Firecracker sandboxes for agent code execution","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Firecrawl","u":"https://www.firecrawl.dev/","co":"Firecrawl","f":"Free w/ key, 500 credits/mo, no card","p":"$19/mo Hobby (3,000 credits)","b":"Scrape/crawl/search to clean markdown for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hyperbrowser","u":"https://www.hyperbrowser.ai/","co":"Hyperbrowser","f":"Free tier: 1,000 credits, 1 concurrent browser","p":"$30/mo Startup (30k credits) + usage","b":"Scalable cloud browsers + scrape/crawl for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Jina AI Reader (r.jina.ai)","u":"https://jina.ai/reader/","co":"Jina","f":"Free, keyless via r.jina.ai URL prefix (~20 req/min)","p":"Paid via API key for higher QPS / more tokens","b":"URL-to-LLM-friendly markdown for agents/RAG","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Kernel (onkernel.com)","u":"https://www.kernel.sh/","co":"Kernel","f":"Free to start; per-second billing, no idle/proxy charges","p":"Usage-based pay-as-you-go","b":"Fast browser infra with persistent agent profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LambdaTest / TestMu AI","u":"https://www.lambdatest.com/","co":"Lambdatest","f":"Free lifetime: 100 automation min/mo, 2 parallel","p":"Automation from ~$79/mo (manual web from ~$15/mo)","b":"Cloud Selenium/Playwright grid + cross-browser","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lightpanda","u":"https://github.com/lightpanda-io/browser","co":"Lightpanda io","f":"Free, open source (beta); CDP-compatible headless browser","p":"n/a","b":"Fast lightweight headless browser for agents (Zig)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Microsoft Playwright MCP","u":"https://github.com/microsoft/playwright-mcp","co":"Microsoft","f":"Free, open source; npx @playwright/mcp","p":"n/a","b":"Accessibility-tree MCP browser control for LLMs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MultiOn","u":"https://docs.multion.ai/welcome","co":"Multion","f":"Free developer credits to start","p":"Usage-based paid","b":"Natural-language autonomous web action agents API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Notte","u":"https://www.notte.cc/","co":"Notte","f":"Open-core framework (SSPL-1.0); Cloud 100 free hrs","p":"From $20/mo; $0.05/browser-hr pay-as-you-go","b":"Hybrid script+AI web agents on browser infra","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Puppeteer","u":"https://github.com/puppeteer/puppeteer","co":"Puppeteer","f":"Free, open source (Apache-2.0); npm i puppeteer","p":"n/a","b":"Headless Chrome/Firefox control via Node.js API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ScraperAPI","u":"https://www.scraperapi.com/","co":"Scraperapi","f":"Free forever: 1,000 credits/mo (5,000 first week)","p":"$49/mo","b":"Proxy + JS-render scraping API with auto anti-bot","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ScrapingBee","u":"https://www.scrapingbee.com/","co":"Scrapingbee","f":"Free trial: 1,000 API credits, no card","p":"$49/mo (250k credits)","b":"Headless-Chrome rendering + JS scenario scraping","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Scrapybara","u":"https://scrapybara.com/","co":"Scrapybara","f":"Free: 10 compute hrs, 100 agent credits, 5 concurrent","p":"Pro $29/mo (100 compute hrs, 500 credits)","b":"Cloud Ubuntu/Windows desktops for computer-use agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Selenium WebDriver","u":"https://www.selenium.dev/","co":"Selenium","f":"Free, open source (Apache-2.0); W3C WebDriver","p":"n/a","b":"Cross-browser automation across all major browsers","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Skyvern","u":"https://github.com/Skyvern-AI/skyvern","co":"Skyvern AI","f":"Free open source (AGPL-3.0); Cloud free 5k credits/mo","p":"Hobby $29/mo (30k credits)","b":"Vision+LLM browser workflow automation via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stagehand (Browserbase)","u":"https://github.com/browserbase/stagehand","co":"Browserbase","f":"Free, open source (MIT); runs local Chromium","p":"n/a (Browserbase optional for cloud)","b":"AI act/extract/observe browser agent SDK, TS/Python","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Steel.dev","u":"https://steel.dev/","co":"Steel","f":"Free Hobby tier; ~100 browser hrs/mo, no card","p":"Starter from ~$29/mo (Developer $99/mo)","b":"Open-source cloud browser API for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ZenRows","u":"https://www.zenrows.com/","co":"Zenrows","f":"Free trial: 1,000 requests / $1 usage, no card (14-day)","p":"$69.99/mo","b":"Scraping Browser + Universal Scraper API w/ anti-bot","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Anthropic Computer Use tool","u":"https://docs.claude.com/en/docs/agents-and-tools/tool-use/computer-use-tool","co":"Claude","f":"none (pay-per-token; beta tool)","p":"Usage-based token pricing","b":"Claude screenshot/mouse/keyboard desktop automation","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAI Computer Use (CUA / Operator)","u":"https://developers.openai.com/api/docs/guides/tools-computer-use","co":"OpenAI","f":"none (pay-per-token via Responses API; research preview, tiers 3-5)","p":"Usage-based token pricing + per-tool-call fee","b":"Pixel-level GUI control agent model via API","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"}]},{"category":"Business, Finance & Accounting (academic)","count":25,"entries":[{"n":"Alpha Vantage — Fundamental Data API","u":"https://www.alphavantage.co/documentation/","co":"Alphavantage","f":"Free w/ key; 25 req/day; income/balance/cash-flow/earnings, GAAP/IFRS-normalized, ~5 yrs","p":"~$50/mo (premium tiers, higher rate limits)","b":"GAAP/IFRS-normalized statements for cross-company comparison","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EODHD (End of Day Historical Data) — Fundamentals API","u":"https://eodhd.com/financial-apis/","co":"Eodhd","f":"Free w/ key; 20 calls/day; limited fundamentals on US exchanges","p":"$19.99/mo (Fundamentals Data Feed)","b":"Global fundamentals across 60+ exchanges, 30+ yrs history","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FDIC BankFind Suite Financial Data API","u":"https://banks.data.fdic.gov/docs/","co":"FDIC","f":"Free, keyless REST API; institution directory + quarterly financials/ratios for all US banks","p":"n/a","b":"US bank-level financials, structure, and history without registration","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FFIEC Central Data Repository / Webservice (Bank Call Reports)","u":"https://cdr.ffiec.gov/public/","co":"Ffiec","f":"Free public bulk downloads + Webservice (SOAP/REST, credentials for API); quarterly bank financials","p":"n/a","b":"US bank Call Report balance sheets and income statements","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Financial Modeling Prep (FMP)","u":"https://site.financialmodelingprep.com/developer/docs","co":"Financialmodelingprep","f":"Free w/ key; 250 req/day, up to 5 yrs annual statements for US companies","p":"$99/mo (Starter / Premium tier)","b":"Standardized income/balance/cash-flow statements and ratios via REST","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Finnhub — Company Fundamentals & Filings API","u":"https://finnhub.io/docs/api","co":"Finnhub","f":"Free w/ key; 60 req/min; basic fundamentals + SEC filings (10-K/10-Q/8-K) endpoint","p":"$11.99/mo (premium; detailed financials, international)","b":"SEC filings index plus basic global fundamentals at high rate limit","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FRED — Federal Reserve Economic Data API","u":"https://fred.stlouisfed.org/docs/api/fred/","co":"FRED (St. Louis Fed)","f":"Free w/ key; 800k+ time series incl. financial accounts (Z.1), rates, aggregates","p":"n/a","b":"Macro and aggregate financial-accounts series (already in catalog)","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GLEIF — Global LEI Index API","u":"https://www.gleif.org/en/lei-data/gleif-api","co":"Gleif","f":"Free, keyless, no registration; 2.5M+ LEI records, parent/child relationships, ISIN/BIC mappings","p":"n/a","b":"Legal-entity identification and corporate ownership structure data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IRS Statistics of Income (SOI) Tax Stats","u":"https://www.irs.gov/statistics/soi-tax-stats-tax-stats-at-a-glance","co":"IRS","f":"Free, keyless bulk datasets (Excel/CSV); corporate, individual, and nonprofit financial aggregates","p":"n/a","b":"Aggregate corporate and individual tax/financial statistics for research","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Marketstack — EDGAR Filings & Stock Data API","u":"https://marketstack.com/documentation_v2","co":"Marketstack","f":"Free w/ key; 100 req/mo; EDGAR endpoints for 10-K/10-Q/8-K plus EOD data","p":"~$9.99/mo (Basic)","b":"Lightweight EDGAR filing retrieval plus EOD prices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nasdaq Data Link (formerly Quandl) — Sharadar Core US Fundamentals (SF1)","u":"https://data.nasdaq.com/databases/SF1","co":"Nasdaq","f":"Free account w/ key for free datasets + sample/preview; some free publishers","p":"~$50/mo (Sharadar SF1 subscription)","b":"24-yr panel of fundamentals & ratios for 16,000+ US firms","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NCUA Credit Union Call Report Data (CUOnline)","u":"https://ncua.gov/analysis/credit-union-corporate-call-report-data","co":"Ncua","f":"Free, keyless bulk ZIP/web service; quarterly 5300 Call Report data since 1994","p":"n/a","b":"US credit-union quarterly financial performance data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenCorporates API","u":"https://api.opencorporates.com/","co":"Opencorporates","f":"Free w/ key for open-data/non-commercial use (rate-limited); 200M+ companies, 170+ jurisdictions","p":"Paid commercial plans (contact sales)","b":"Cross-jurisdiction company registry identity and basic data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Polygon.io — Stock Financials (vX) API","u":"https://polygon.io/docs/rest/stocks/overview","co":"Polygon","f":"Free Basic w/ key historically (~5 req/min, SEC-derived financials); free availability has varied — verify current","p":"$29/mo (Stocks Starter)","b":"SEC-derived financials alongside real-time/historical market data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SEC DERA Financial Statement Data Sets (bulk)","u":"https://www.sec.gov/data-research/sec-markets-data/financial-statement-data-sets","co":"U.S. SEC","f":"Free, keyless bulk ZIP downloads; quarterly numeric XBRL face-financials, tab-delimited","p":"n/a","b":"Bulk panel datasets of structured financials for academic research","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SEC EDGAR APIs (data.sec.gov) — Submissions, Company Concept, Company Facts, Frames","u":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces","co":"U.S. SEC","f":"Free, keyless (User-Agent header w/ contact email required); ~10 req/sec fair-access","p":"n/a","b":"Authoritative XBRL fundamentals and filing history for all US public companies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SEC EDGAR Full-Text Search API (efts.sec.gov)","u":"https://efts.sec.gov/LATEST/search-index?q=apple","co":"U.S. SEC","f":"Free, keyless; full-text search across all EDGAR filings since 2001 incl. exhibits","p":"n/a","b":"Keyword/ticker/CIK full-text search across filing bodies and exhibits","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SEC Financial Statement and Notes Data Sets","u":"https://www.sec.gov/data-research/sec-markets-data/financial-statement-notes-data-sets","co":"U.S. SEC","f":"Free, keyless bulk ZIP; numeric + text data incl. footnotes from XBRL exhibits","p":"n/a","b":"Full financials plus note-level disclosures for textual/numeric analysis","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SimFin — Financial Data API","u":"https://www.simfin.com/en/fundamental-data-download/","co":"Simfin","f":"Free w/ key; bulk + Python/Web API; ~10+ yrs statements & ratios (free data delayed ~12 months)","p":"SimFin+ paid plans for non-delayed / fuller data","b":"Clean bulk fundamentals and computed ratios for backtesting/research","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tiingo — Fundamentals API","u":"https://www.tiingo.com/documentation/fundamentals","co":"Tiingo","f":"Free Starter tier covers prices (EOD/IEX); fundamentals require paid Power add-on, not free","p":"~$30/mo (Power individual) + fundamentals add-on","b":"US equity fundamentals alongside historical prices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Twelve Data — Fundamentals API","u":"https://twelvedata.com/fundamentals","co":"Twelvedata","f":"Free Basic w/ key; ~800 calls/day; income/balance/cash-flow, ratios, profiles","p":"$29/mo (Grow)","b":"Statements, ratios, and corporate events with deep history","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UK Companies House API","u":"https://developer.company-information.service.gov.uk/","co":"UK Government","f":"Free w/ key; company profiles, officers, PSC, filing history, document downloads; 600 req/5min","p":"n/a","b":"UK company registry filings, officers, and filed accounts (PDF)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Wharton Research Data Services (WRDS)","u":"https://wrds-www.wharton.upenn.edu/","co":"Upenn","f":"Institutional academic subscription only (no public free tier); Python/R/SAS access","p":"Institutional license (academic; pricing on request)","b":"Gold-standard academic finance/accounting datasets (Compustat, CRSP)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"XBRL US — XBRL API & Public Filings Database","u":"https://xbrl.us/home/priorities/use/xbrl-api/","co":"Xbrl","f":"Free w/ registration (API key + optional OAuth2); SEC + FERC + ESEF as-reported XBRL facts","p":"n/a (membership unlocks higher quotas)","b":"Query SEC and FERC as-reported XBRL facts across companies","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"yfinance (unofficial Yahoo Finance) — financials/fundamentals","u":"https://github.com/ranaroussi/yfinance","co":"Ranaroussi","f":"Free, keyless (open-source library over Yahoo public endpoints); educational use; can break","p":"n/a","b":"Quick prototyping of statements/ratios; not for production","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Cannabis & Regulated industries","count":25,"entries":[{"n":"ARCOS Data Portal / API (Washington Post + Notre Dame)","u":"https://wpinvestigative.github.io/arcos/","co":"Wpinvestigative","f":"Free w/ key (shared 'WaPo' key or individual; R 'arcos'/Python 'arcospy')","p":"n/a","b":"550M+ opioid/controlled-substance transaction records","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CDC Cannabis Data & Surveillance","u":"https://www.cdc.gov/cannabis/about/index.html","co":"U.S. CDC","f":"Free, keyless published policy/surveillance data","p":"n/a","b":"US state-level cannabis legal status & health data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Colorado Licensed Marijuana Businesses (data.colorado.gov/Socrata)","u":"https://data.colorado.gov/Government/Licensed-Marijuana-Businesses-in-Colorado/93ae-ftjz","co":"Colorado","f":"Free, keyless Socrata SODA API (free app token for limits)","p":"n/a","b":"Colorado licensed cannabis business lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Confident Cannabis / Confident LIMS (lab COA data)","u":"https://www.confidentlims.com/","co":"Confidentlims","f":"Free public COA lookup; API access for partners","p":"Contact sales (no public list price)","b":"Cannabis lab certificate-of-analysis (potency) data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DEA ARCOS Retail Drug Summary Reports","u":"https://www.deadiversion.usdoj.gov/arcos/retail_drug_summary/arcos-drug-summary-reports.html","co":"Usdoj","f":"Free, keyless downloadable reports","p":"n/a","b":"Controlled-substance distribution volumes by area","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FDA Center for Tobacco Products - Application Metrics & Reporting","u":"https://www.fda.gov/tobacco-products/market-and-distribute-tobacco-product/tobacco-product-applications-metrics-reporting","co":"U.S. FDA","f":"Free, keyless published metrics datasets (PMTA/SE actions)","p":"n/a","b":"FDA tobacco premarket application review metrics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Massachusetts Cannabis Control Commission Open Data (Socrata)","u":"https://masscannabiscontrol.com/open-data/data-catalog/","co":"Masscannabiscontrol","f":"Free, keyless Socrata SODA API datasets (licenses, sales)","p":"n/a","b":"MA licensed cannabis businesses, retail sales data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Nevada Gaming Control Board - Gaming Revenue & Statistics","u":"https://www.gaming.nv.gov/about-us/gaming-revenue-information-gri/","co":"Nv","f":"Free, keyless downloadable revenue reports & license data","p":"n/a","b":"Nevada casino gaming revenue, licensee location reports","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"New York OCM Cannabis Licenses (data.ny.gov/Socrata)","u":"https://data.ny.gov/Economic-Development/Current-OCM-Licenses/jskf-tt3q","co":"Ny","f":"Free, keyless Socrata SODA API (app token recommended)","p":"n/a","b":"NY adult-use/medical cannabis license & dispensary data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIST CannaQAP (cannabis lab QA reports)","u":"https://www.nist.gov/programs-projects/nist-tools-cannabis-laboratory-quality-assurance","co":"NIST","f":"Free, keyless published NIST Internal Reports (data)","p":"n/a","b":"Reference/QA data for cannabis lab measurement accuracy","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA (catalog anchor)","u":"https://open.fda.gov/apis/","co":"openFDA","f":"Free, keyless (free key for higher limits)","p":"n/a","b":"FDA drug/device/tobacco/food public data (context anchor)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug NDC Directory API (DEA schedule field)","u":"https://open.fda.gov/apis/drug/ndc/","co":"openFDA","f":"Free, keyless (rate-limited; free key raises limits)","p":"n/a","b":"Drug NDC data incl. DEA controlled-substance schedule","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Tobacco Problem Reports API","u":"https://open.fda.gov/apis/tobacco/problem/","co":"openFDA","f":"Free, keyless (240 req/min keyless; higher w/ free key)","p":"n/a","b":"Consumer/health tobacco product problem reports","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenTHC API (open-source cannabis traceability standard)","u":"https://openthc.org/api","co":"Openthc","f":"Free, open-source (MIT/GPL; self-host; spec + reference)","p":"n/a","b":"Open cannabis data models, B2B/B2C traceability interop","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Oregon Open Data Portal (OLCC Cannabis & Liquor, Socrata)","u":"https://data.oregon.gov/","co":"Oregon","f":"Free, keyless Socrata SODA API datasets","p":"n/a","b":"Oregon cannabis & liquor licensee and sales data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TTB Open Data (permits, statistics datasets)","u":"https://www.ttb.gov/data","co":"Ttb","f":"Free, keyless downloadable datasets (FAA permit lists, stats)","p":"n/a","b":"Federal alcohol/tobacco permit holders, production stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TTB Public COLA Registry","u":"https://www.ttb.gov/online-services/public-cola-registry","co":"Ttb","f":"Free, keyless (public web search/registry; no registration)","p":"n/a","b":"US alcohol/tobacco label approvals (COLAs) lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UK Gambling Commission Public Register","u":"https://www.gamblingcommission.gov.uk/public-register","co":"UK Government","f":"Free, keyless bulk downloads (CSV/Excel/Zip of licensees)","p":"n/a","b":"GB licensed gambling operators, premises, enforcement","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA Hemp eManagement Platform (HeMP) Public/LE Search Tool","u":"https://hemp.ams.usda.gov/s/PublicSearchTool","co":"U.S. USDA","f":"Free, keyless public/LE search of licensed hemp producers","p":"n/a","b":"Federally/state-licensed hemp grower lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Washington State LCB - Cannabis & Liquor License Lists / CCRS","u":"https://lcb.wa.gov/records/frequently-requested-lists","co":"Wa","f":"Free, keyless downloadable license lists (CSV/Excel)","p":"n/a","b":"WA cannabis & liquor licensees, traceability records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"BDSA (cannabis market analytics & pricing)","u":"https://bdsa.com/solutions/cannabis-market-pricing-data/","co":"Bdsa","f":"none (commercial subscription)","p":"Subscription, contact sales (no public list price)","b":"Cannabis market sizing, pricing tiers, consumer insights","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"BioTrack (cannabis traceability & compliance API)","u":"https://biotrack.com/","co":"Biotrack","f":"none (licensee/state-program access)","p":"Contact sales (no public list price)","b":"State cannabis traceability where BioTrack is the CRE","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Cannabiz Media (license intelligence)","u":"https://www.cannabiz.media/","co":"Cannabiz","f":"none (paid license database + API)","p":"Subscription, contact sales (no public list price)","b":"Aggregated US cannabis/hemp license holder database","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Headset (cannabis retail market & POS data)","u":"https://www.headset.io/cannabis-market-data","co":"Headset","f":"none (commercial; API for partners)","p":"Subscription, contact sales (no public list price)","b":"Cannabis sales, pricing, brand market-share analytics","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Metrc / Metrc Connect API (seed-to-sale)","u":"https://www.metrc.com/track-and-trace-technology/open-api/","co":"Metrc","f":"none (access tied to state licensee + vendor approval)","p":"Contact/vendor onboarding (no public list price)","b":"State-mandated cannabis seed-to-sale compliance data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Chemicals & Materials","count":22,"entries":[{"n":"AFLOW (Automatic FLOW for Materials Discovery)","u":"http://aflowlib.org/","co":"Aflowlib","f":"Free, keyless AFLUX search API + OPTIMADE","p":"n/a","b":"High-throughput computational materials properties","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CAS Common Chemistry API","u":"https://www.cas.org/services/commonchemistry-api","co":"Cas","f":"Free w/ key registration; CC-BY-NC 4.0 (noncommercial)","p":"Separate commercial license required for commercial use","b":"Authoritative CAS Registry Numbers, names, basic properties","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ChEBI (Chemical Entities of Biological Interest, EBI)","u":"https://www.ebi.ac.uk/chebi/webServices.do","co":"EMBL-EBI","f":"Free, keyless REST API (SOAP deprecated)","p":"n/a","b":"Curated chemical ontology, formulae, structures, synonyms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ChEMBL Web Services (EMBL-EBI)","u":"https://chembl.gitbook.io/chembl-interface-documentation/web-services/chembl-data-web-services","co":"Gitbook","f":"Free, keyless REST API","p":"n/a","b":"Bioactive drug-like molecules, assays, targets, bioactivities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ChemSpider API (Royal Society of Chemistry)","u":"https://developer.rsc.org/","co":"Rsc","f":"Free w/ key, Open Developer Preview: 1000 calls/month","p":"Contact api@rsc.org for higher allowance","b":"100M+ structures, name/structure search, format conversion","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Crystallography Open Database (COD)","u":"https://www.crystallography.net/","co":"Crystallography","f":"Free, keyless REST API + OPTIMADE; CC0 data","p":"n/a","b":"Open crystal structures (CIF) for organics/inorganics/minerals","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ECHA CHEM / IUCLID Public REST API (European Chemicals Agency)","u":"https://iuclid6.echa.europa.eu/public-api","co":"European Union","f":"Free public REST API + bulk REACH/C&L downloads","p":"n/a","b":"EU REACH registrations, GHS/CLP classification & labelling","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EPA CompTox / Computational Toxicology & Exposure APIs (CTX/CCTE)","u":"https://api-ccte.epa.gov/docs","co":"U.S. EPA","f":"Free w/ key (email ccte_api@epa.gov); no cost, commercial OK","p":"n/a","b":"Chemical hazard, ToxCast bioactivity, fate/transport, DTXSID lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"EPA ECOTOX Knowledgebase","u":"https://cfpub.epa.gov/ecotox/","co":"U.S. EPA","f":"Free, keyless (web query + bulk downloads)","p":"n/a","b":"Aquatic/terrestrial chemical ecotoxicity data by species","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Substance Registry Services (SRS)","u":"https://cdxapps.epa.gov/oms-substance-registry-services/rest-api/","co":"U.S. EPA","f":"Free, keyless REST web services (Swagger/OAS 3.0)","p":"n/a","b":"EPA central registry: CAS, substance IDs across regulations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Materials Project API","u":"https://next-gen.materialsproject.org/api","co":"Materialsproject","f":"Free w/ key (auto-generated on registration)","p":"n/a","b":"DFT-computed materials properties, batteries, structures","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NCI/CADD Chemical Identifier Resolver (Cactus)","u":"https://cactus.nci.nih.gov/chemical/structure","co":"NIH","f":"Free, keyless (URL-based resolver)","p":"n/a","b":"Convert names/CAS/SMILES/InChI/structure between formats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST Chemistry WebBook","u":"https://webbook.nist.gov/chemistry/","co":"NIST","f":"Free, keyless (web/URL query access; no formal REST API)","p":"n/a","b":"Thermochemical/thermophysical/ion energetics reference data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Reaction Database (ORD)","u":"https://docs.open-reaction-database.org/","co":"Open reaction database","f":"Free, keyless (open data + query interface, ord-schema)","p":"n/a","b":"Open organic reaction data: conditions, yields, procedures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OPSIN (Open Parser for Systematic IUPAC Nomenclature, EBI)","u":"https://www.ebi.ac.uk/opsin/","co":"EMBL-EBI","f":"Free, keyless web service + open-source library","p":"n/a","b":"IUPAC chemical name to structure (SMILES/InChI/CML)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OPTIMADE (Open Databases Integration for Materials Design)","u":"https://www.optimade.org/","co":"Optimade","f":"Free, keyless federated REST spec across many providers","p":"n/a","b":"Unified query across AFLOW, OQMD, COD, JARVIS, etc.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OQMD (Open Quantum Materials Database)","u":"https://oqmd.org/","co":"Oqmd","f":"Free, keyless REST API + OPTIMADE endpoint","p":"n/a","b":"DFT thermodynamic & structural properties, 1M+ materials","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PubChem PUG-REST (NIH/NCBI)","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (rate-limited ~5 req/s, 400 req/min)","p":"n/a","b":"Largest open chemical compound/substance/bioassay database","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubChem PUG-View (GHS/LCSS hazard data)","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-view","co":"NCBI (NIH)","f":"Free, keyless (same throttling as PUG-REST)","p":"n/a","b":"GHS classification, safety summaries, annotated chemical safety","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikidata SPARQL (chemistry)","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless SPARQL endpoint","p":"n/a","b":"Cross-reference CAS/InChI/ChEBI/ChEMBL/PubChem identifiers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CloudSDS API","u":"https://cloudsds.com/sds-api/","co":"Cloudsds","f":"none (enterprise)","p":"Paid (contact for pricing)","b":"Enterprise REST access to SDS documents & metadata","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"SDS Manager SDS Parser API","u":"https://sdsmanager.com/us/sds-parser-api/","co":"Sdsmanager","f":"none (trial/quote based)","p":"Paid (contact for pricing)","b":"Search millions of SDS; parse 16 sections to JSON/XML","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Chemistry & Chemical data","count":27,"entries":[{"n":"BindingDB REST API","u":"https://www.bindingdb.org/rwd/bind/BindingDBRESTfulAPI.jsp","co":"Bindingdb","f":"Free, keyless","p":"n/a","b":"Protein-small molecule binding affinities (Ki/IC50/Kd)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CAS Common Chemistry API","u":"https://www.cas.org/services/commonchemistry-api","co":"Cas","f":"Free w/ registration (CC BY-NC)","p":"n/a","b":"CAS RNs, names, structures for ~500k substances","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ChEBI REST API (EBI)","u":"https://www.ebi.ac.uk/chebi/backend/api/docs/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Ontology of small biological chemical entities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ChEMBL Web Services","u":"https://www.ebi.ac.uk/chembl/api/data/docs","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Bioactivity, drug-like molecules, targets, assays","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Cheminformatics Microservice (NFDI4Chem)","u":"https://api.naturalproducts.net/latest/docs","co":"Naturalproducts","f":"Free, keyless","p":"n/a","b":"RDKit/CDK/OpenBabel structure ops via REST","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ChemSpider API (RSC)","u":"https://developer.rsc.org/compounds-v1/apis","co":"Rsc","f":"Free w/ key/token","p":"n/a","b":"Millions of structures, name/structure/property search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Crystallography Open Database (COD)","u":"https://wiki.crystallography.net/RESTful_API/","co":"Crystallography","f":"Free, keyless (CC0)","p":"n/a","b":"Open crystal structures, CIF, formula/SMARTS search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DrugBank API","u":"https://docs.drugbank.com/","co":"Drugbank","f":"Free academic license (data); API paid","p":"Contact sales (commercial license)","b":"Drug chemistry, targets, interactions, metabolism","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPA CompTox (CTX) APIs","u":"https://www.epa.gov/comptox-tools/computational-toxicology-and-exposure-apis","co":"U.S. EPA","f":"Free w/ key (email request)","p":"n/a","b":"Chemistry, toxicity, exposure for 1M+ chemicals","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GNPS / GNPS2 Spectral Libraries API","u":"https://wang-bioinformatics-lab.github.io/GNPS2_Documentation/api/","co":"Wang bioinformatics lab","f":"Free, keyless","p":"n/a","b":"Community MS/MS reference spectral libraries, search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Human Metabolome Database (HMDB)","u":"https://hmdb.ca/","co":"Hmdb","f":"Free download, keyless","p":"n/a","b":"Metabolites with MS/NMR spectra, structures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MassBank Europe REST API","u":"https://massbank.eu/MassBank-api/ui/","co":"Massbank","f":"Free, keyless","p":"n/a","b":"Open mass spectra records by InChIKey/name/peaks","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MassBank of North America (MoNA)","u":"https://mona.fiehnlab.ucdavis.edu/documentation/query","co":"Ucdavis","f":"Free, keyless","p":"n/a","b":"Mass spectra metadata query and download","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Materials Project API","u":"https://next-gen.materialsproject.org/api","co":"Materialsproject","f":"Free w/ key","p":"n/a","b":"Computed inorganic materials, energetics, reactions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NCI/CADD Chemical Identifier Resolver (Cactus)","u":"https://cactus.nci.nih.gov/chemical/structure","co":"NIH","f":"Free, keyless","p":"n/a","b":"Resolve names/CAS/SMILES/InChI to structures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST Chemistry WebBook","u":"https://webbook.nist.gov/chemistry/","co":"NIST","f":"Free, keyless (web; no official API)","p":"n/a","b":"Thermochemistry, IR/MS spectra reference data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"nmrshiftdb2","u":"https://nmrshiftdb.nmr.uni-koeln.de/","co":"Uni koeln","f":"Free, keyless","p":"n/a","b":"Open NMR spectra and shift prediction (13C/1H)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Reaction Database (ORD)","u":"https://docs.open-reaction-database.org/","co":"Open reaction database","f":"Free, open (data on GitHub/GCP)","p":"n/a","b":"Structured organic reaction data for ML","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OPSIN (name to structure)","u":"https://opsin.ch.cam.ac.uk/","co":"Cam","f":"Free, keyless","p":"n/a","b":"IUPAC name to SMILES/InChI/CML conversion","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OPTIMADE","u":"https://www.optimade.org/","co":"Optimade","f":"Free, keyless","p":"n/a","b":"Unified query across many materials databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PubChem PUG REST","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Compounds, properties, bioassays by CID/name/SMILES","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubChem PUG-View","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-view","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Full annotated compound records, safety, literature","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RCSB PDB Data/Search API","u":"https://data.rcsb.org/","co":"RCSB PDB","f":"Free, keyless","p":"n/a","b":"Protein structures and bound ligand chemistry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SureChEMBL","u":"https://www.surechembl.org/","co":"Surechembl","f":"Free, keyless (web/data; API expanding)","p":"n/a","b":"Chemicals mined from patent documents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UniChem (EBI)","u":"https://www.ebi.ac.uk/unichem/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Cross-reference compound IDs across chemistry databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ZINC (CartBlanche) API","u":"https://cartblanche.docking.org/","co":"Docking","f":"Free, keyless","p":"n/a","b":"Purchasable compounds, 3D dock-ready, virtual screening","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Reaxys API (Elsevier)","u":"https://www.elsevier.com/products/reaxys","co":"Elsevier","f":"none","p":"Subscription (contact sales)","b":"Curated reactions, substances, spectra, patents","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Clinical trial registries & protocols","count":24,"entries":[{"n":"AACT Database (CTTI / Aggregate Analysis of ClinicalTrials.gov)","u":"https://aact.ctti-clinicaltrials.org/","co":"Ctti clinicaltrials","f":"Free. Full relational PostgreSQL mirror of ALL ClinicalTrials.gov protocol + results data, refreshed nightly via pg_dump. Two access modes: (1) direct…","p":"None - free for all uses","b":"Deep analytical / SQL queries across the entire ClinicalTrials.gov corpus without paginating the API - best for bulk research, cohort analytics…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ANZCTR (Australian New Zealand Clinical Trials Registry)","u":"https://www.anzctr.org.au/","co":"Anzctr","f":"Free. WHO primary registry for Australia/NZ. Web search; per-trial XML/print export; automated weekly XML feed to WHO ICTRP. No public self-serve REST API…","p":"None","b":"Australia/New Zealand trials (incl. many observational/registry studies underrepresented elsewhere).","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ChiCTR - Chinese Clinical Trial Registry","u":"https://www.chictr.org.cn/indexEN.html","co":"Org","f":"Free public registry, WHO primary registry for China (4th primary registry, recognized 2007; established 2005). Bilingual web search; per-trial pages. No…","p":"None","b":"China-conducted trials; pull via WHO ICTRP for bulk needs.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Fully free, keyless public REST API. Base URL https://clinicaltrials.gov/api/v2. Endpoints: GET /studies (search with query.* and filter.* params, paginated…","p":"None - no paid tier","b":"Primary US registry; full structured protocol + results data for ~500k studies (recruitment status, eligibility, outcomes, locations, sponsors).…","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinicalTrials.gov bulk study-records download","u":"https://clinicaltrials.gov/data-api/how-download-study-records","co":"ClinicalTrials.gov","f":"Free, keyless. Official bulk/full-dataset download of study records as JSON (each study as a separate file in a ZIP, or one combined .json) plus CSV export…","p":"None","b":"Seeding or fully refreshing a local mirror of ClinicalTrials.gov without hitting API rate limits.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinicalTrials.gov CSV download","u":"https://clinicaltrials.gov/data-api/about-api/csv-download","co":"ClinicalTrials.gov","f":"Free, keyless. Official path to download search results / selected fields across many studies as CSV (in addition to the JSON-zip bulk option). Documented…","p":"None","b":"Quick tabular extracts of chosen fields across a study set for spreadsheet/analysis use without writing API pagination code.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ctrdata (R package - multi-registry aggregator)","u":"https://rfhb.github.io/ctrdata/","co":"Rfhb","f":"Free, open-source (CRAN + github.com/rfhb/ctrdata). R toolkit that retrieves, deduplicates, aggregates and analyses structured protocol + results data AND…","p":"None","b":"One-stop programmatic federation across the major US/EU/UK registries from R, with dedup and document download - saves writing per-registry…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CTRI - Clinical Trials Registry India","u":"https://ctri.nic.in/","co":"Nic","f":"Free public registry (mandatory in India since June 2009; launched 2007, hosted by ICMR). Fielded web search (trial type, design, phase, keyword). Records…","p":"None","b":"India-conducted trials - large, fast-growing corpus with strong representation in Asian/global health research.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DRKS - German Clinical Trials Register","u":"https://drks.de/search/en","co":"Drks","f":"Free (operated by BfArM). WHO primary registry for Germany, 20k+ studies. Web search plus export of individual or multiple studies in various formats; the…","p":"None","b":"German trials with structured per-record JSON export - cleaner programmatic access than most non-US/EU national registries.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EU Clinical Trials Register (EudraCT / clinicaltrialsregister.eu)","u":"https://www.clinicaltrialsregister.eu/","co":"Clinicaltrialsregister","f":"Free public website. Covers EU/EEA interventional drug trials authorized 1 May 2004 - 30 Jan 2025 (legacy; new trials now in CTIS). Web search plus…","p":"None official","b":"Historical EU drug-trial protocols + results (2004-2025) - essential for retrospective EU coverage that predates CTIS.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EU CTIS Public API (Clinical Trials Information System)","u":"https://euclinicaltrials.eu/ctis-public/search","co":"Euclinicaltrials","f":"Free, keyless, undocumented-but-public JSON API backing the public web portal (confirmed by reverse-engineering writeups and the ctrdata R package). POST…","p":"None","b":"Current and future EU/EEA interventional trials with structured protocol, application status, decisions, and documents - the successor to EudraCT.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EU TrialsTracker (Bennett Institute / EBM DataLab)","u":"https://eu.trialstracker.net/","co":"Trialstracker","f":"Free. Tracker of EU Clinical Trials Register (EUCTR) trials that breach EU results-reporting rules, with sponsor/university transparency rankings. Built by…","p":"None","b":"EU trial results-reporting compliance auditing per sponsor/university.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FDAAA TrialsTracker (Bennett Institute / EBM DataLab)","u":"https://fdaaa.trialstracker.net/","co":"Trialstracker","f":"Free. Live tool tracking every ClinicalTrials.gov trial subject to FDA Amendments Act 2007 results-reporting requirements (in force for trials due after Jan…","p":"None","b":"Trial results-reporting compliance / transparency analytics on US trials - which sponsors are late reporting results.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"HMA-EMA Catalogues of real-world data sources and studies (formerly EU PAS Register)","u":"https://catalogues.ema.europa.eu/","co":"European Union","f":"Free, public. Two linked catalogues launched 2024 that replaced the EU PAS Register and the ENCePP Resources Database: (1) Catalogue of Real-World Data…","p":"None","b":"EU non-interventional / observational / pharmacoepidemiology and post-authorisation safety studies and the real-world data sources behind them…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"IRCT - Iranian Registry of Clinical Trials","u":"https://www.irct.ir/","co":"Irct","f":"Free public registry, WHO primary registry for Iran (run by the Iranian Ministry of Health). Web search; records flow to WHO ICTRP. No documented public…","p":"None","b":"Iran-conducted trials (a high-volume contributor to WHO ICTRP).","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ISRCTN Registry (XML API)","u":"https://www.isrctn.com/","co":"Isrctn","f":"Free, keyless. UK-based WHO primary registry (interventional + observational, all areas). Public XML API (built by 67 Bricks) with two calls - retrieve one…","p":"Registering a new trial carries a fee; data access/API is free.","b":"UK and international interventional + observational trials with stable ISRCTN IDs; good complement to ClinicalTrials.gov for non-US/EU studies.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"JPRN / NIPH Clinical Trials Search Portal (Japan)","u":"https://rctportal.niph.go.jp/en","co":"Go","f":"Free. Cross-search portal (National Institute of Public Health) federating Japan's registries - jRCT, UMIN-CTR, JMACCT, JAPIC/JapicCTI - the JPRN entry (WHO…","p":"None","b":"Unified search across all Japanese trial registries in one place (EN/JP).","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"jRCT - Japan Registry of Clinical Trials","u":"https://jrct.mhlw.go.jp/en-top","co":"Go","f":"Free public registry (MHLW), bilingual EN/JP. Covers trials under Japan's Clinical Trials Act. Web search only - terms of use explicitly prohibit automated…","p":"None","b":"Japanese regulated clinical trials; access programmatically via WHO ICTRP rather than scraping jRCT directly.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PACTR - Pan African Clinical Trials Registry","u":"https://pactr.samrc.ac.za/","co":"Ac","f":"Free, open-access (no login needed to search). Only WHO primary registry for Africa (recognized 2009; hosted by SAMRC). Free trial registration and search.…","p":"None","b":"Trials conducted across Africa - the authoritative source for African clinical-research coverage.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"TrialGPT (NIH/NLM patient-to-trial matching)","u":"https://www.ncbi.nlm.nih.gov/research/trialgpt/","co":"NCBI (NIH)","f":"Free research framework + open code/data (github.com/ncbi-nlp/TrialGPT). LLM-based patient-to-trial matching over ClinicalTrials.gov: three modules…","p":"None (you bring your own LLM compute / API key)","b":"Building patient-eligibility matching against ClinicalTrials.gov criteria with explainable per-criterion judgments.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Trialstreamer","u":"https://trialstreamer.robotreviewer.net/","co":"Robotreviewer","f":"Free. Living, auto-updated database of RCT reports - continuously monitors PubMed + WHO ICTRP via a validated ML classifier, extracts PICO…","p":"None","b":"ML-extracted structured RCT evidence (PICO + risk of bias) linking publications to registrations - ideal for evidence synthesis / systematic-review…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"UMIN-CTR (University Hospital Medical Information Network Clinical Trials Registry, Japan)","u":"https://www.umin.ac.jp/ctr/","co":"Ac","f":"Free, no charge to all requesters. Largest academic trial registry in Japan (since 2005), bilingual, WHO primary registry. Downloadable daily CSV snapshots…","p":"None","b":"Japanese academic/investigator-initiated trials with a real CSV bulk-download option (rare among Asian registries).","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WHO ICTRP (International Clinical Trials Registry Platform)","u":"https://trialsearch.who.int/","co":"WHO","f":"Free, keyless. Global meta-registry consolidating the WHO Trial Registration Data Set from ~18 primary registries worldwide. Search portal at…","p":"None","b":"Single global cross-registry view - de-duplicated trials bridging ClinicalTrials.gov, EU CTIS/EU CTR, ISRCTN, ChiCTR, CTRI, jRCT, UMIN, ANZCTR…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO ICTRP full dataset CSV download","u":"https://www.who.int/tools/clinical-trials-registry-platform/network/who-data-set/downloading-records-from-the-ictrp-database","co":"WHO","f":"Free. Full export of all ICTRP records as a Zip of CSV, generated MONTHLY and published to WHO's public OneDrive - requires a Microsoft/Hotmail login to…","p":"None","b":"Bulk offline analysis of the worldwide WHO-network trial corpus when API access is not available for the constituent registries.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"}]},{"category":"Clinical trial results, IPD & analytics","count":45,"entries":[{"n":"AACT - Aggregate Analysis of ClinicalTrials.gov (CTTI)","u":"https://aact.ctti-clinicaltrials.org/","co":"Ctti clinicaltrials","f":"Free. Full relational PostgreSQL DB of all ClinicalTrials.gov protocol + results data (40+ tables incl. outcome_measures, reported_events/adverse events…","p":"None","b":"SQL/analytics over the entire trials corpus including results & adverse events without paging the JSON API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ANZCTR (Australian New Zealand Clinical Trials Registry)","u":"https://www.anzctr.org.au/","co":"Anzctr","f":"Free, fully public WHO primary registry; records exported to ICTRP. Web search + per-record export (XML/print); no widely documented public REST API (bulk…","p":"None","b":"Australia/New Zealand and regional trial registrations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ANZCTR (Australian New Zealand Clinical Trials Registry) Web Service","u":"https://www.anzctr.org.au/","co":"Anzctr","f":"Free, fully public WHO primary registry. VERIFIED to expose a SOAP web service at https://api.anzctr.org.au/ (AnzctrWebservices) with ~20 operations…","p":"None","b":"Australia/New Zealand and regional trial registrations with a programmatic web-service interface","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CDISC Library API (clinical data standards: SDTM, ADaM, CDASH, controlled terminology, COSMoS/biomedical concepts)","u":"https://www.cdisc.org/cdisc-library/api-documentation","co":"Cdisc","f":"Developer portal at https://api.developer.library.cdisc.org/; REST/JSON; base https://library.cdisc.org/api (COSMoS endpoints under /api/cosmos/v2). Requires…","p":"Access tied to CDISC membership / paid subscription; API key required.","b":"Machine-readable standards for trial datasets, endpoint/outcome variable definitions, and controlled terminology","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CDISC Library API (SDTM, ADaM, CDASH, controlled terminology, COSMoS biomedical concepts)","u":"https://www.cdisc.org/cdisc-library/api-documentation","co":"Cdisc","f":"Verified. REST/JSON API; developer portal at https://api.developer.library.cdisc.org/, base https://library.cdisc.org/api, COSMoS endpoints under…","p":"Access tied to CDISC membership / paid subscription; API key required","b":"Machine-readable standards for trial datasets, endpoint/outcome variable definitions, and controlled terminology","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Citeline Trialtrove (+ Trials/Drugs data feeds/APIs)","u":"https://www.citeline.com/en/products-services/clinical/trialtrove","co":"Citeline","f":"No free tier - commercial (Citeline/Norstella). Verified product: curated trial intelligence covering trial design, enrollment timelines, populations…","p":"Enterprise subscription (contact sales; sometimes via university library licences)","b":"Commercial competitive/landscape intelligence on trial endpoints, outcomes, and pipeline","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Citeline Trialtrove + Trials/Drugs APIs (Pharmaprojects, Sitetrove)","u":"https://www.citeline.com/en/products-services/clinical/trialtrove","co":"Citeline","f":"No free tier - commercial. Curated trial intelligence (design, enrollment timelines, populations, endpoints, outcomes, geography) from 60,000+ sources…","p":"Enterprise subscription (contact sales; sometimes accessible via university library…","b":"Commercial competitive/landscape intelligence on trial endpoints, outcomes, and pipeline via API","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"ClinicalStudyDataRequest.com (CSDR)","u":"https://www.clinicalstudydatarequest.com/","co":"Clinicalstudydatarequest","f":"Free public catalog/search of 3,000+ studies. Verified 13 pharma sponsors (Astellas, Bayer, Boehringer Ingelheim, Daiichi Sankyo, Eisai, GSK, Lilly…","p":"None (access free, proposal-gated)","b":"Multi-sponsor consortium IPD requests (GSK, Sanofi, Novartis, plus academic funders)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ClinicalTrials.gov v2 API (results: outcomes, adverse events, participant flow)","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Fully free, keyless REST/OpenAPI. Verified live: GET https://clinicaltrials.gov/api/v2/studies returns JSON with protocolSection, outcome measures…","p":"None (US-government public API)","b":"Programmatic pull of structured trial summary results, endpoints/outcomes and adverse-event tables per NCT ID","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Cochrane CENTRAL (Central Register of Controlled Trials)","u":"https://www.cochranelibrary.com/central/about-central","co":"Cochranelibrary","f":"Limited free abstracts via Cochrane Library search; 2M+ records of controlled trials harvested from PubMed/Embase/registries (incl. ClinicalTrials.gov…","p":"Full access via Cochrane Library subscription (institutional/national licences)","b":"Systematic-review-grade comprehensive index of RCTs/controlled trials","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"COMET Initiative Database (Core Outcome Sets)","u":"https://www.comet-initiative.org/Resources/Database","co":"Comet initiative","f":"Verified. Free, publicly searchable repository of published + ongoing core outcome set (COS) studies, searchable by disease; maintained via systematic-review…","p":"None","b":"Standardized endpoint/outcome selection - which core outcomes should be measured per condition","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ctrdata (R package - multi-register aggregation & results)","u":"https://rfhb.github.io/ctrdata/","co":"Rfhb","f":"Verified free open-source R package (CRAN/GitHub) to query, download, and analyze protocol- and results-related data from ClinicalTrials.gov, EU-CTR, EU…","p":"None","b":"Aggregating and analyzing trial results across the major public registers in one local database","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DRKS (German Clinical Trials Register, BfArM)","u":"https://www.bfarm.de/EN/BfArM/Tasks/German-Clinical-Trials-Register/_node.html","co":"Bfarm","f":"Verified. Free public search of 20,000+ studies; export of individual/multiple study records as JSON (and other formats) from the public area. Data publicly…","p":"None","b":"German WHO-primary registry records with JSON export of trial metadata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EMA Clinical Data Publication (Policy 0070) portal","u":"https://clinicaldata.ema.europa.eu/","co":"European Union","f":"Free, registration-based access to clinical reports (clinical study reports / CSRs, protocols, statistical analysis plans) submitted to EMA in support of…","p":"None","b":"Reading the actual pivotal-trial CSRs/protocols/SAPs behind EU drug approvals (deepest regulatory trial evidence)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EMA Clinical Data Publication website (Policy 0070 - CSRs)","u":"https://clinicaldata.ema.europa.eu/","co":"European Union","f":"Free. Under EMA Policy 0070 (since 2015), proactive publication of clinical reports (CSRs, protocols, clinical overviews/summaries) submitted in EU…","p":"None","b":"Reading the full clinical study reports and trial-level methods/results behind EU drug approvals (deeper than EPAR summaries)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EMA Medicines / EPAR open data + JSON endpoints","u":"https://www.ema.europa.eu/en/medicines/download-medicine-data","co":"European Union","f":"Free downloadable data tables (Excel/CSV) of human & veterinary medicines, EPARs (scientific assessment reports incl. pivotal-trial evidence), orphan…","p":"None (some third-party repackagers are paid)","b":"Regulatory assessment of pivotal trial evidence behind EU drug approvals and paediatric/orphan data","s":"In use","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EU Clinical Trials Register (EU-CTR / EudraCT)","u":"https://www.clinicaltrialsregister.eu/","co":"Clinicaltrialsregister","f":"Free public search of EudraCT protocol + sponsor-posted summary results for EU/EEA interventional trials (legacy, pre-CTIS). Verified: web search +…","p":"None","b":"EU legacy registry protocol + posted summary results (pre-CTIS era)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EU CTIS Public API (Clinical Trials Information System / EMA)","u":"https://euclinicaltrials.eu/ctis-public/search","co":"Euclinicaltrials","f":"Free, keyless undocumented public API backing the portal: POST https://euclinicaltrials.eu/ctis-public-api/search (overview of all trials) and GET…","p":"None","b":"Current EU regulatory trial records under CTR 536/2014 (replaces EU-CTR going forward)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EU TrialsTracker (Bennett Institute, Oxford)","u":"https://eu.trialstracker.net/","co":"Trialstracker","f":"Free public tracker of results-reporting status for trials on the EU Clinical Trials Register (EUCTR); verified live (shows current reported-rate figures).…","p":"None","b":"EU/EUCTR results-reporting transparency and non-reporting sponsor audit","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FDA Sentinel System / Sentinel Initiative (active surveillance RWE)","u":"https://www.sentinelinitiative.org/","co":"Sentinelinitiative","f":"Verified active federal program. Free public methods, query tools (ARIA), routine-querying packages, common data model, and 260+ published analyses…","p":"N/A - federal program; underlying data not licensable to public","b":"Active post-market safety surveillance methodology and aggregate signal analyses","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FDAAA TrialsTracker (Bennett Institute, Oxford)","u":"https://fdaaa.trialstracker.net/","co":"Trialstracker","f":"Free public dashboard tracking FDAAA 2007 results-reporting compliance (basic results due within 12 months) per sponsor/trial. Verified actively maintained…","p":"None","b":"Identifying which Applicable Clinical Trials have/haven't reported results on time and by sponsor","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Health Canada Clinical Information Portal (Public Release of Clinical Information, PRCI)","u":"https://clinical-information.canada.ca/","co":"Government of Canada","f":"Free public portal to search and access clinical information (CSRs, protocols, SAPs) from drug and device submissions to Health Canada. Anonymized documents…","p":"None","b":"Accessing Canadian regulatory clinical study reports and protocols underlying drug/device decisions","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Health Canada Public Release of Clinical Information (PRCI) portal","u":"https://clinical-information.canada.ca/","co":"Government of Canada","f":"Free, no login. Health Canada proactively publishes clinical information (clinical study reports, protocols, clinical summaries) for drugs, biologics…","p":"None","b":"Free access to full CSRs and trial documentation behind Health Canada product approvals (drug and device)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"HMA-EMA Catalogues of Real-World Data Sources and Studies (formerly EU PAS Register / ENCePP)","u":"https://catalogues.ema.europa.eu/","co":"European Union","f":"Free public catalogues of real-world data sources and post-authorisation/observational studies (currently ~282 data sources, ~3,365 studies). Replaced the EU…","p":"None","b":"Discovering European RWD data sources and registered post-authorisation safety/effectiveness studies","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"HMA-EMA Catalogues of Real-World Data Sources and Studies (replaced EU PAS Register / ENCePP)","u":"https://catalogues.ema.europa.eu/","co":"European Union","f":"Verified. Free public, FAIR-metadata catalogues of RWD sources and post-authorisation/observational studies (282 data sources, 3,365 studies; global scope).…","p":"None","b":"Discovering European/global RWD data sources and registered post-authorisation safety/effectiveness studies","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"ISRCTN Registry","u":"https://www.isrctn.com/","co":"Isrctn","f":"Free, fully open and searchable WHO/ICMJE primary registry of trials (all phases). Has an ISRCTN XML API for programmatic access; also CSV export from search…","p":"A fee is charged to register a new study (administered by BMC/Springer Nature)…","b":"UK/international registry records, esp. non-drug and academic trials, with XML API access","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ISRCTN Registry (with XML API)","u":"https://www.isrctn.com/","co":"Isrctn","f":"Free, fully open WHO/ICMJE primary registry of trials (all phases). VERIFIED to offer a free XML API at https://www.isrctn.com/api (draft docs) plus CSV…","p":"Fee charged to register a new study (publisher BMC); reading and API are free","b":"UK/international registry records (esp. non-drug and academic trials) with programmatic XML retrieval","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"N3C - National COVID Cohort Collaborative Data Enclave (NCATS)","u":"https://ncats.nih.gov/research/research-activities/n3c/overview","co":"NIH","f":"Verified NCATS/NIH program. Free to apply; secure cloud enclave with individual-level harmonized clinical data (COVID cohort) from many US sites. Access…","p":"None (DUR-gated)","b":"Large harmonized US patient-level RWE for COVID and comparator research inside a secure enclave","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"NHLBI BioLINCC (Biologic Specimen and Data Repository)","u":"https://biolincc.nhlbi.nih.gov/","co":"NIH","f":"Verified NIH/NHLBI repository. Free to browse study/biospecimen collections; teaching/public-use datasets freely downloadable. Full de-identified datasets…","p":"None (request-gated)","b":"NHLBI cardiovascular/pulmonary/blood clinical-trial and cohort IPD plus biospecimens","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"NIDDK Central Repository (NIDDK-CR)","u":"https://repository.niddk.nih.gov/","co":"NIH","f":"Verified NIH/NIDDK repository (CoreTrustSeal certified). Free to browse 171 studies with data / 110 with specimens (11,450 datasets) in…","p":"None (request-gated)","b":"NIDDK-funded clinical trial IPD and biosamples for secondary analysis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"OHDSI / OMOP Common Data Model + ATLAS WebAPI","u":"https://www.ohdsi.org/software-tools/","co":"Ohdsi","f":"Free open-source: OMOP CDM standard, ATLAS web tool, and WebAPI (RESTful). Verified live public demo: https://atlas-demo.ohdsi.org with WebAPI at…","p":"None (self-hosted against your own CDM data)","b":"Standardized observational/RWE analytics, cohort definitions, and federated study code generation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"openFDA Device Adverse Event API (MAUDE)","u":"https://open.fda.gov/apis/device/event/","co":"openFDA","f":"Free, keyless (same openFDA limits: 240/min, 1,000/day per IP). Endpoint https://api.fda.gov/device/event.json; MAUDE device adverse-event reports ~1992+…","p":"Free API key for higher limits (120,000/day per key)","b":"Device-trial / device safety adverse-event surveillance","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Adverse Event API (FAERS)","u":"https://open.fda.gov/apis/drug/event/","co":"openFDA","f":"Free, keyless: 240 req/min and 1,000 req/day per IP (verified on open.fda.gov/apis/authentication). Endpoint https://api.fda.gov/drug/event.json; FAERS…","p":"Free API key raises limits to 240 req/min and 120,000 req/day per key (no paid tier)","b":"Post-market drug adverse-event signals to complement trial AE data","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openICPSR / ICPSR clinical-trial & health data deposits","u":"https://www.openicpsr.org/openicpsr/","co":"Openicpsr","f":"Free to search; openICPSR hosts self-deposited de-identified research datasets including some clinical-trial IPD with open or restricted (DUA) access; ICPSR…","p":"None for access (some deposit/curation services are fee-based for depositors).","b":"Finding self-archived de-identified trial/health IPD and restricted-use research datasets for secondary analysis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenSAFELY (secure analytics over NHS primary-care records)","u":"https://www.opensafely.org/","co":"Opensafely","f":"Free, open-source secure analytics platform (Bennett Institute, Oxford) for running code against tens of millions of NHS England patient records in situ. All…","p":"None (approval-gated access for approved researchers/projects)","b":"Privacy-preserving large-scale RWE / pharmacoepidemiology studies and pragmatic trial emulation over NHS data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenTrials (archived/defunct, Open Knowledge Foundation / Ben Goldacre)","u":"https://opentrials.net/","co":"Opentrials","f":"ARCHIVED/INACTIVE (site explicitly states no longer active). Was an open machine-readable database linking registry entries, papers, regulatory docs and…","p":"None","b":"Historical/linked-trial-data reference and the opentrials collectors code for registry scraping (not a live service)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PCORnet (National Patient-Centered Clinical Research Network) Common Data Model","u":"https://pcornet.org/","co":"Pcornet","f":"Verified. Free documentation/specs for the PCORnet CDM; distributed network of 8 Clinical Research Networks + Coordinating Center where SQL/SAS queries…","p":"Network participation / study-specific data partner agreements","b":"Distributed RWE queries across clinical research networks for pragmatic trials/observational studies","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Project Data Sphere (oncology IPD)","u":"https://data.projectdatasphere.org/","co":"Projectdatasphere","f":"Free, open access after registration to de-identified patient-level oncology trial datasets; NO research proposal required; free SAS analytic tools on the…","p":"None","b":"Open, low-friction access to control-arm/comparator oncology IPD for analysis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"SAS Clinical Trial Data Transparency","u":"https://support.sas.com/en/software/sas-clinical-trial-data-transparency-support.html","co":"Sas","f":"No free tier - commercial. Verified real product (latest release 4.5; Multi-Sponsor Environment editions). Secure globally available environment to analyze…","p":"Commercial SAS licence / enterprise contract (contact sales)","b":"Hosting and analyzing multi-sponsor anonymized IPD in a controlled secure research environment","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"The YODA Project (Yale Open Data Access)","u":"https://yoda.yale.edu/","co":"Yale","f":"Free to browse trial listings (verified ~503 trials available) and publicly posted data requests/decisions. IPD access via research proposal + independent…","p":"None (access free, proposal-gated)","b":"Requesting J&J/Medtronic/SI-BONE individual patient-level trial data with transparent public review","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"TransCelerate DataCelerate (clinical + preclinical data sharing)","u":"https://www.transceleratebiopharmainc.com/initiatives/datacelerate/","co":"Transceleratebiopharmainc","f":"Verified real platform. Member-company (TransCelerate/BioCelerate) validated, access-controlled secure platform integrating de-identified clinical (incl.…","p":"Access restricted to TransCelerate member biopharma companies (membership-based)","b":"Cross-sponsor sharing of historical placebo/standard-of-care/comparator and preclinical tox data among member pharma","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vivli - Center for Global Clinical Research Data (IPD platform)","u":"https://vivli.org/","co":"Vivli","f":"Free to search the metadata catalog (verified ~8,000+ trials, 5.2M+ participants, 55+ member contributors) at search.vivli.org. Anonymized individual…","p":"Data hosting/sharing fees for contributing sponsors; researcher access generally free…","b":"Largest cross-sponsor repository to request individual patient-level data for secondary analysis/meta-analysis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WHO ICTRP (International Clinical Trials Registry Platform)","u":"https://www.who.int/tools/clinical-trials-registry-platform","co":"WHO","f":"Verified. Free search portal at https://trialsearch.who.int aggregating primary registries worldwide; weekly updates. Bulk download of new/updated records…","p":"None","b":"Global cross-registry trial discovery and de-duplicated worldwide trial inventory","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"WHO UMC VigiAccess API (VigiBase pharmacovigilance)","u":"https://who-umc.org/vigibase-search-services/vigiaccess-api/","co":"Who umc","f":"Public VigiAccess web app (vigiaccess.org) is free, search by substance, aggregated ADR counts. The VigiAccess API (verified) adds search by substance AND…","p":"VigiAccess API is paid (cost-recovery model; contact UMC). Full VigiBase ICSR access is…","b":"Global aggregated adverse-reaction signals from the VigiBase ICSR database","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TransCelerate DataCelerate (clinical + preclinical data-sharing platform)","u":"https://www.transceleratebiopharmainc.com/initiatives/datacelerate/","co":"Transceleratebiopharmainc","f":"None public. Member-only platform (TransCelerate/BioCelerate) integrating de-identified clinical + preclinical/toxicology data in one access-controlled…","p":"Access restricted to TransCelerate/BioCelerate member biopharma companies…","b":"Cross-sponsor sharing of historical control/comparator (PSoC) and preclinical tox data among member pharma","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Clinical trials","count":24,"entries":[{"n":"AACT Database (CTTI / Duke)","u":"https://aact.ctti-clinicaltrials.org/","co":"Ctti clinicaltrials","f":"Free; cloud PostgreSQL + daily bulk download (free account)","p":"n/a","b":"Full relational dump of ClinicalTrials.gov for analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ANZCTR (Australian New Zealand Clinical Trials Registry)","u":"https://www.anzctr.org.au/","co":"Anzctr","f":"Free; public search + WHO data export; CSV/XML downloads","p":"n/a","b":"Australia/NZ trials; WHO primary registry feed","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ChiCTR (Chinese Clinical Trial Registry)","u":"https://www.chictr.org.cn/","co":"Org","f":"Free; public web search (EN/zh); WHO primary registry","p":"n/a","b":"China trials; feeds WHO ICTRP","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless","p":"n/a","b":"World's largest trial registry; JSON REST search & study records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CRiS (Korea Clinical Research Information Service)","u":"https://cris.nih.go.kr/","co":"Go","f":"Free; public search portal; WHO primary registry","p":"n/a","b":"South Korea trials; feeds WHO ICTRP","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ctrdata (R package, multi-register aggregator)","u":"https://rfhb.github.io/ctrdata/","co":"Rfhb","f":"Free, open-source; queries CTGov, EUCTR, CTIS, ISRCTN","p":"n/a","b":"Unified programmatic retrieval across multiple registers","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CTRI (Clinical Trials Registry - India)","u":"https://ctri.nic.in/","co":"Nic","f":"Free; public search portal; WHO primary registry","p":"n/a","b":"India trials; feeds WHO ICTRP","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DailyMed RESTful Web Services (NLM)","u":"https://dailymed.nlm.nih.gov/dailymed/app-support-web-services.cfm","co":"NLM (NIH)","f":"Free, keyless; SPL drug labeling in XML/JSON","p":"n/a","b":"Structured Product Labels for trial drug/intervention data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.europa.eu EU Clinical Trials Register dataset","u":"https://data.europa.eu/data/datasets/european-union-clinical-trials-register","co":"European Union","f":"Free open-data catalog entry for EUCTR","p":"n/a","b":"EU open-data portal access to EUCTR register data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"DRKS (German Clinical Trials Register)","u":"https://drks.de/","co":"Drks","f":"Free; public search + WHO/CSV export","p":"n/a","b":"Germany trials; WHO primary registry","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Drugs@FDA / FDA Drug databases (openFDA NDC, label, Orange Book)","u":"https://open.fda.gov/apis/","co":"openFDA","f":"Free, keyless 40 req/min; key 240 req/min","p":"n/a","b":"FDA-approved drugs, labels, NDC for trial products","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EMA Medicines / Clinical Trials Information System (EMA)","u":"https://www.ema.europa.eu/en/human-regulatory-overview/research-development/clinical-trials-human-medicines/clinical-trials-information-system","co":"European Union","f":"Free; downloadable medicines datasets + CTIS portal","p":"n/a","b":"EU regulatory context for trial drugs and CTIS","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EU Clinical Trials Register (EudraCT / clinicaltrialsregister.eu)","u":"https://www.clinicaltrialsregister.eu/","co":"Clinicaltrialsregister","f":"Free; web search + plain-text export; no official REST","p":"n/a","b":"Legacy EU/EEA trials 2004-onward (EudraCT protocol/results)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EU CTIS Public API (euclinicaltrials.eu)","u":"https://euclinicaltrials.eu/ctis-public/search","co":"Euclinicaltrials","f":"Free, keyless; undocumented POST /ctis-public-api/search powering the public portal","p":"n/a","b":"EU/EEA trials under the new Clinical Trials Regulation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ICTRP COVID-19 trials dataset (WHO)","u":"https://www.who.int/tools/clinical-trials-registry-platform/network/who-data-set/downloading-records-from-the-ictrp-database","co":"WHO","f":"Free; updated COVID-19 trial download files","p":"n/a","b":"Bulk COVID-19 trial records across all registries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"ISRCTN Registry XML API","u":"https://www.isrctn.com/page/faqs","co":"Isrctn","f":"Free; XML query + per-trial retrieval, CSV export","p":"n/a","b":"UK-based registry of all health & social care trials","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"jRCT / JPRN (Japan Registry of Clinical Trials)","u":"https://jrct.niph.go.jp/","co":"Go","f":"Free; public search portal; WHO primary registry network","p":"n/a","b":"Japan trials; part of JPRN feeding WHO ICTRP","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NCBI E-utilities (PubMed/Entrez)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25497/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s); API key raises to 10 req/s","p":"n/a","b":"Biomedical literature behind trials; PubMed/PMC retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Adverse Events (FAERS)","u":"https://open.fda.gov/apis/drug/event/","co":"openFDA","f":"Free, keyless 40 req/min; with key 240 req/min","p":"n/a","b":"Post-market drug safety / adverse event surveillance","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RxNorm / RxNav APIs (NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/index.html","co":"NLM (NIH)","f":"Free, keyless (with rate caps); RESTful JSON/XML","p":"n/a","b":"Normalizing drug names/codes for trial interventions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"TCTR (Thai Clinical Trials Registry)","u":"https://www.thaiclinicaltrials.org/","co":"Thaiclinicaltrials","f":"Free; public search portal; WHO primary registry","p":"n/a","b":"Thailand/SE Asia trials; feeds WHO ICTRP","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"TrialGPT (NIH/NLM patient-trial matching)","u":"https://github.com/ncbi-nlp/TrialGPT","co":"Ncbi nlp","f":"Free open-source research code; not a hosted public API (requires your own OpenAI/Azure key)","p":"n/a","b":"LLM-based patient eligibility matching to CTGov trials","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WHO ICTRP Search Portal / Web Service","u":"https://www.who.int/tools/clinical-trials-registry-platform/the-ictrp-search-portal","co":"WHO","f":"Free; portal search + XML/CSV download; weekly dataset on request","p":"n/a","b":"Global aggregated view across WHO primary trial registries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"myTomorrows Matching API","u":"https://mytomorrows.com/enterprise/api-beta-program/","co":"Mytomorrows","f":"none (enterprise beta; contact beta@mytomorrows.com)","p":"Contact sales","b":"GenAI pre-screening of patient records to trial eligibility","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Computer & Information sciences","count":30,"entries":[{"n":"Anaconda.org (conda) API","u":"https://www.anaconda.com/docs/reference/api/main","co":"Anaconda","f":"Free, keyless read","p":"n/a","b":"Conda package metadata across channels","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless (3 req/sec)","p":"n/a","b":"CS preprints metadata, abstracts, categories","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CodeSOTA (Papers with Code successor)","u":"https://www.codesota.com/","co":"Codesota","f":"Free; per-score JSON API (e.g. /api/sota/{benchmark})","p":"n/a","b":"ML SOTA leaderboards, benchmarks (PwC replacement)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key, rate-limited","p":"n/a (higher limits on request)","b":"300M+ open-access full-text research papers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"crates.io API","u":"https://crates.io/data-access","co":"Crates","f":"Free, keyless (rate-limited, User-Agent req'd)","p":"n/a","b":"Rust crate metadata, versions, downloads","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (polite pool w/ email)","p":"Metadata Plus paid tier for SLA/snapshots","b":"DOI metadata, citations, journal records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DBLP Computer Science Bibliography","u":"https://dblp.org/faq/13501473.html","co":"Dblp","f":"Free, keyless search API + XML dumps","p":"n/a","b":"CS publications, authors, venues bibliography","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"deps.dev API (Open Source Insights)","u":"https://docs.deps.dev/api/v3/","co":"Deps","f":"Free, keyless (JSON over HTTP + gRPC)","p":"n/a","b":"Dependencies, licenses, advisories, OSS health","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ecosyste.ms (Packages API)","u":"https://ecosyste.ms/api","co":"Ecosyste","f":"Free, keyless, 5000 req/hr per IP","p":"n/a","b":"Package/version/dependency metadata, many registries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Figshare API v2","u":"https://docs.figshare.com/","co":"Figshare","f":"Free; keyless public read, OAuth2 for write","p":"n/a (institutional plans)","b":"Research datasets, articles, figures, code","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GitHub REST & GraphQL API","u":"https://docs.github.com/en/rest","co":"En","f":"Free; 60 req/hr unauth, 5000/hr w/ token","p":"n/a (org plans for higher limits)","b":"Repos, code, issues, commits, code search","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GitLab REST API","u":"https://docs.gitlab.com/api/rest/","co":"Gitlab","f":"Free; keyless returns public projects only","p":"n/a (self-managed/SaaS plans)","b":"Public projects, repos, packages, pipelines","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Hugging Face Hub API","u":"https://huggingface.co/docs/hub/en/index","co":"Hugging Face","f":"Free; public hub browse/download keyless, Serverless Inference free w/ key (rate-limited)","p":"PRO $9/mo; Inference Endpoints pay-per-GPU-hour","b":"ML models, 500k+ datasets, serverless inference","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Kaggle Public API","u":"https://www.kaggle.com/docs/api","co":"Kaggle","f":"Free w/ key (kaggle.json token)","p":"n/a","b":"Datasets, competitions, notebooks, models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Libraries.io API","u":"https://libraries.io/api","co":"Libraries","f":"Free w/ key, 60 req/min","p":"n/a","b":"Open-source packages across 30+ ecosystems","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"npm Registry API","u":"https://github.com/npm/registry/blob/main/docs/REGISTRY-API.md","co":"Npm","f":"Free, keyless","p":"n/a","b":"JavaScript/Node package metadata, versions","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NuGet Server API","u":"https://learn.microsoft.com/en-us/nuget/api/overview","co":"Microsoft","f":"Free, keyless read; key for publish","p":"n/a","b":".NET package metadata, search, versions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless, no rate limit (polite pool w/ email)","p":"Premium subscription for daily updates/faster","b":"250M+ scholarly works, authors, institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations API","u":"https://opencitations.net/index/api/v2","co":"Opencitations","f":"Free, keyless","p":"n/a","b":"Open citation graph data between scholarly works","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenSSF Scorecard API","u":"https://api.scorecard.dev","co":"Scorecard","f":"Free, keyless; weekly scans of 1M+ critical OSS repos","p":"n/a","b":"Security health scores for OSS GitHub repos","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OSV.dev (Open Source Vulnerabilities) API","u":"https://google.github.io/osv.dev/api/","co":"Google","f":"Free, keyless","p":"n/a","b":"Vulnerabilities in open-source packages by version","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Packagist API","u":"https://packagist.org/apidoc","co":"Packagist","f":"Free, keyless","p":"n/a","b":"PHP/Composer package metadata, search, stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PyPI JSON API","u":"https://docs.pypi.org/api/json/","co":"Pypi","f":"Free, keyless","p":"n/a","b":"Python package metadata, versions, releases","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RubyGems.org API","u":"https://guides.rubygems.org/rubygems-org-api/","co":"Rubygems","f":"Free, keyless read; key for push/owner ops","p":"n/a","b":"Ruby gem metadata, versions, dependencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free; keyless works but rate-limited, free key recommended","p":"n/a (free key on request)","b":"200M+ papers, citations, TLDRs, influence","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Software Heritage API","u":"https://archive.softwareheritage.org/api/","co":"Softwareheritage","f":"Free, keyless (rate-limited; token for higher)","p":"n/a","b":"Universal archive of source code & history","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sourcegraph Public Code Search (GraphQL API)","u":"https://sourcegraph.com/search","co":"Sourcegraph","f":"Free; public code search across 2M+ repos (token required for API)","p":"Enterprise plans for private/self-hosted","b":"Regex/full-text code search across OSS repos","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stack Exchange API (Stack Overflow)","u":"https://api.stackexchange.com/docs","co":"Stackexchange","f":"Free; keyless 300 req/day/IP, register app for 10k/day","p":"n/a","b":"Q&A, tags, users, answers across network","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCI Machine Learning Repository","u":"https://archive.ics.uci.edu/","co":"Uci","f":"Free, keyless; official ucimlrepo Python pkg","p":"n/a","b":"Classic benchmark ML datasets for research","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Zenodo REST API","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free; keyless read, token for deposit","p":"n/a","b":"Research datasets, DOIs, software archives","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Construction, Architecture & Building","count":26,"entries":[{"n":"2050 Materials API","u":"https://docs.2050-materials.com/getting-started-with-2050-materials/using-the-api","co":"2050 materials","f":"Open endpoint (limited fields) + test token on request","p":"Paid subscription (custom)","b":"Sustainability/LCA data for 100k+ building products","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Autodesk Platform Services (APS, formerly Forge)","u":"https://aps.autodesk.com/","co":"Autodesk","f":"Free dev tier w/ key; metered cloud credits","p":"Pay-as-you-go cloud credits / subscription","b":"BIM model viewing, derivatives, IFC/RVT/DWG translation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BLS Producer Price Index (construction materials)","u":"https://www.bls.gov/ppi/","co":"U.S. BLS","f":"Free; keyless limited, free key (v2) for higher limits","p":"n/a","b":"Construction material and building-type price indexes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CSLB Public Data Portal (CA contractor licenses)","u":"https://www.cslb.ca.gov/onlineservices/dataportal/","co":"Ca","f":"Free, keyless (bulk data export)","p":"n/a","b":"California contractor license bulk data, three master files","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DC Open Data (building permits)","u":"https://opendata.dc.gov/","co":"Dc","f":"Free, keyless (ArcGIS REST)","p":"n/a","b":"Washington DC construction permits and inspections","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EC3 (Building Transparency) API","u":"https://www.buildingtransparency.org/api-access-pricing/","co":"Buildingtransparency","f":"Free for verified orgs/professional accounts (rate-limited)","p":"Revenue/usage-scaled paid for production use","b":"Open EPD database for embodied-carbon of materials","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GSA Inventory of Owned & Leased Properties (IOLP)","u":"https://catalog.data.gov/dataset/inventory-of-owned-and-leased-properties-iolp","co":"Data.gov","f":"Free, keyless (bulk download / ArcGIS)","p":"n/a","b":"US federal owned/leased buildings, construction dates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HUD Residential Construction Permits by County (HUD GIS)","u":"https://hudgis-hud.opendata.arcgis.com/datasets/HUD::residential-construction-permits-by-county/about","co":"Arcgis","f":"Free, keyless (ArcGIS REST / download)","p":"n/a","b":"County-level US residential construction permit counts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Microsoft Building Footprints (open data)","u":"https://github.com/microsoft/GlobalMLBuildingFootprints","co":"Microsoft","f":"Free, keyless (open data on Azure/GitHub)","p":"n/a","b":"ML-derived global building footprint polygons","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NREL/NLR Building Component Library API","u":"https://bcl.nrel.gov/api/","co":"NREL","f":"Free (BCL API keyless/registration); NLR key for other buildings APIs","p":"n/a","b":"Building energy modeling components, measures, ResStock/ComStock","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"NYC Open Data (DOB Permit Issuance, Socrata)","u":"https://data.cityofnewyork.us/Housing-Development/DOB-Permit-Issuance/ipu4-2q9a","co":"Cityofnewyork","f":"Free, keyless (app token raises rate limits)","p":"n/a","b":"NYC building permit issuance via SoQL queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenEPD / EC3 openEPD API (Building Transparency)","u":"https://docs.open-epd-forum.org/en/rest-api/","co":"Buildingtransparency","f":"Free open data format + API access (verified accounts)","p":"Paid for production/high-volume use","b":"Open standard for digital Environmental Product Declarations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Overpass API (OpenStreetMap buildings)","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless (fair-use rate limits)","p":"n/a","b":"Building footprints and structures from OSM tags","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Procore API","u":"https://developers.procore.com/","co":"Procore","f":"Free dev sandbox; production needs Procore account","p":"Requires paid Procore subscription","b":"Construction project/management platform integrations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SAM.gov Get Opportunities API","u":"https://open.gsa.gov/api/get-opportunities-public-api/","co":"U.S. GSA","f":"Free w/ key (api.data.gov), rate-limited","p":"n/a","b":"Federal construction bid/solicitation opportunities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SF Open Data (DataSF building permits, Socrata)","u":"https://data.sfgov.org/","co":"Sfgov","f":"Free, keyless (app token for higher limits)","p":"n/a","b":"San Francisco building permit and inspection records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Shovels API","u":"https://docs.shovels.ai/","co":"Shovels","f":"Free trial w/ key (limited calls)","p":"Paid subscription plans (custom)","b":"Nationwide building permits, contractors, property records","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Speckle (open AEC data platform)","u":"https://speckle.systems/","co":"Speckle","f":"Free open-source / community tier w/ token","p":"Paid business plans (custom)","b":"Versioned BIM/AEC data exchange, IFC, automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UK Planning Data Platform (planning.data.gov.uk)","u":"https://www.planning.data.gov.uk/docs","co":"Data.gov","f":"Free, keyless","p":"n/a","b":"England planning applications, listed buildings, land","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"US Census Building Permits Survey (BPS)","u":"https://www.census.gov/construction/bps/","co":"U.S. Census Bureau","f":"Free w/ key (Census Data API key now required)","p":"n/a","b":"US residential building permit counts by geography","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"US Census Construction Spending (VIP/C30)","u":"https://www.census.gov/construction/c30/c30index.html","co":"U.S. Census Bureau","f":"Free w/ key (Census economic indicators API)","p":"n/a","b":"Monthly value of US construction put in place","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA NRCS Soil Data Access (SDA)","u":"https://sdmdataaccess.nrcs.usda.gov/","co":"U.S. USDA","f":"Free, keyless (REST/SOAP SQL web services)","p":"n/a","b":"Soil survey/SSURGO data for site and foundation work","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGBC Arc (Skoru) Data API","u":"https://developer.usgbc.org/","co":"Usgbc","f":"Free dev/test subscription w/ key","p":"LEED certification fees (project-based)","b":"LEED green-building certification and performance data sync","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BuildZoom Data","u":"https://www.buildzoomdata.com/","co":"Buildzoomdata","f":"none (bulk data / API licensing)","p":"Paid bulk data files / API (custom)","b":"350M+ historical US permits and contractor license records","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Construction Monitor","u":"https://www.constructionmonitor.com/","co":"Constructionmonitor","f":"none (data subscription / API licensing)","p":"Paid subscription (custom)","b":"Nationwide building permit data and construction leads","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"ICC Code Connect API (building codes)","u":"https://solutions.iccsafe.org/codeconnect","co":"Iccsafe","f":"none","p":"Paid annual subscription (population/title-based)","b":"Integrating ICC model building codes and standards","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Cultural heritage & digital archives aggregators","count":28,"entries":[{"n":"Archives Portal Europe API","u":"https://www.archivesportaleurope.net/tools/","co":"Archivesportaleurope","f":"Free w/ key (registered account)","p":"n/a","b":"Aggregated European archival finding aids/descriptions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Art Institute of Chicago API","u":"https://api.artic.edu/docs/","co":"Artic","f":"Free, keyless (60 req/min)","p":"n/a","b":"AIC artworks, IIIF images, public-domain metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Cleveland Museum of Art Open Access API","u":"https://openaccess-api.clevelandart.org/","co":"Clevelandart","f":"Free, keyless","p":"n/a","b":"CMA open-access artworks and CC0 images","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Cooper Hewitt Smithsonian Design Museum API","u":"https://collection.cooperhewitt.org/api/","co":"Cooperhewitt","f":"Free w/ token/key","p":"n/a","b":"Design museum collection objects and metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Deutsche Digitale Bibliothek API","u":"https://www.deutsche-digitale-bibliothek.de/content/journal/technik/api","co":"Deutsche digitale bibliothek","f":"Free w/ key","p":"n/a","b":"Aggregated German libraries, museums, archives metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Digital Public Library of America (DPLA) API","u":"https://pro.dp.la/developers/api-basics","co":"Dp","f":"Free w/ key","p":"n/a","b":"Aggregated US library/archive/museum digital items","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DigitalNZ API","u":"https://digitalnz.org/developers","co":"Digitalnz","f":"Free, keyless (key no longer required as of v3)","p":"n/a","b":"Aggregated New Zealand cultural heritage records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Europeana APIs (Search, Record, Entity)","u":"https://pro.europeana.eu/page/apis","co":"Europeana","f":"Free w/ personal key","p":"n/a","b":"Aggregated European GLAM cultural heritage metadata/media","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Europeana IIIF / Newspapers / Full-text APIs","u":"https://pro.europeana.eu/page/iiif","co":"Europeana","f":"Free; IIIF retrieval keyless, manifest generation needs key","p":"n/a","b":"IIIF manifests and full-text for aggregated heritage","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"Europeana SPARQL endpoint (Linked Open Data)","u":"https://pro.europeana.eu/page/sparql","co":"Europeana","f":"Free, keyless","p":"n/a","b":"Querying linked open data across all Europeana datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Getty Vocabularies (AAT/ULAN/TGN) SPARQL & LOD","u":"https://www.getty.edu/research/tools/vocabularies/","co":"Getty","f":"Free, keyless (SPARQL/LOD/recon)","p":"n/a","b":"Art/architecture thesaurus, artist names, place authorities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Harvard Art Museums API","u":"https://github.com/harvardartmuseums/api-docs","co":"Harvardartmuseums","f":"Free w/ key","p":"n/a","b":"Harvard art collections, IIIF images, rich metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IIIF (International Image Interoperability Framework)","u":"https://iiif.io/api/","co":"Iiif","f":"Free, keyless (open spec, per-institution endpoints)","p":"n/a","b":"Standardized image/presentation delivery across GLAM institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Internet Archive (Advanced Search / Metadata / Wayback APIs)","u":"https://archive.org/developers/","co":"Archive","f":"Free, keyless","p":"n/a","b":"Books, audio, video, web archive items metadata/full-text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Library of Congress JSON/loc.gov API","u":"https://www.loc.gov/apis/json-and-yaml/","co":"Loc","f":"Free, keyless","p":"n/a","b":"LoC digital collections, photos, manuscripts metadata","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Metropolitan Museum of Art Collection API","u":"https://metmuseum.github.io/","co":"Metmuseum","f":"Free, keyless","p":"n/a","b":"Met collection objects, CC0 artwork images metadata","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"National Gallery of Art (US) Open Data Program","u":"https://github.com/NationalGalleryOfArt/opendata","co":"NationalGalleryOfArt","f":"Free, keyless (CC0 CSV bulk download)","p":"n/a","b":"130k+ NGA artworks, artists, provenance, image links (CC0)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting)","u":"https://www.openarchives.org/pmh/","co":"Openarchives","f":"Free, keyless (open protocol, per-repository)","p":"n/a","b":"Harvesting metadata from archives/repositories","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Paris Musees Open Data API (GraphQL)","u":"https://apicollections.parismusees.paris.fr/en/opendata","co":"Paris","f":"Free, keyless (CC0 public-domain works)","p":"n/a","b":"150k+ CC0 images across 14 City of Paris museums","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Reconciliation Service API (OpenRefine / W3C CG spec)","u":"https://reconciliation-api.github.io/specs/latest/","co":"Reconciliation api","f":"Free, keyless (open spec)","p":"n/a","b":"Reconciling heritage data against authority sources","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Rijksmuseum Data Services (Search/OAI-PMH/LDES)","u":"https://data.rijksmuseum.nl/docs/","co":"Rijksmuseum","f":"Free w/ key (Search API); OAI-PMH/LDES keyless","p":"n/a","b":"Dutch national museum artworks, high-res images, IIIF","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"Smithsonian Open Access API","u":"https://www.si.edu/openaccess/devtools","co":"Si","f":"Free w/ api.data.gov key","p":"n/a","b":"4.5M+ Smithsonian collection records, CC0 images metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Trove API (National Library of Australia)","u":"https://trove.nla.gov.au/about/create-something/using-api","co":"Nla","f":"Free w/ key (non-commercial; keyless access discontinued 2025)","p":"n/a","b":"Australian newspapers, books, archives aggregation","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"VIAF (Virtual International Authority File) API","u":"https://www.oclc.org/developer/api/oclc-apis/viaf.en.html","co":"Oclc","f":"Free, keyless (ODC-BY data)","p":"n/a","b":"Aggregated name authority records across libraries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Victoria and Albert Museum (V&A) Collections API","u":"https://developers.vam.ac.uk/guide/v2/","co":"Vam","f":"Free, keyless","p":"n/a","b":"1M+ V&A records, 470k IIIF manifests, design/decorative arts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wikidata Query Service (SPARQL)","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Linked data hub cross-referencing heritage authorities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikimedia Commons API (MediaWiki Action API)","u":"https://commons.wikimedia.org/wiki/Commons:API/MediaWiki","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Free media files, GLAM uploads, structured data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Yale LUX / Linked Art API","u":"https://lux.collections.yale.edu/","co":"Yale","f":"Free, keyless (Linked Art JSON-LD)","p":"n/a","b":"17M+ Yale cross-collection objects as Linked Open Data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Data repositories","count":23,"entries":[{"n":"Borealis (Canadian Dataverse) API","u":"https://borealisdata.ca/guides/en/latest/api/native-api.html","co":"Borealisdata","f":"Free; public search keyless, token for deposit","p":"n/a","b":"Canadian multidisciplinary research data (Dataverse-based)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"data.gov Catalog API (CKAN)","u":"https://docs.ckan.org/en/latest/api/","co":"Ckan","f":"Free, keyless; metadata only (api.gsa.gov mirror uses key)","p":"n/a","b":"US gov open-data dataset catalog metadata search","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DataCite REST API (Public)","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless for public DOI search/metadata","p":"n/a","b":"Find datasets/DOIs across all repositories by metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataONE Member/Coordinating Node API","u":"https://dataoneorg.github.io/api-documentation/","co":"Dataoneorg","f":"Free, keyless for public search/read","p":"n/a","b":"Federated environmental/earth science data network","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Dataverse Native/Search API","u":"https://guides.dataverse.org/en/latest/api/native-api.html","co":"Dataverse","f":"Free; public search keyless, token for deposit/private","p":"n/a","b":"Harvard Dataverse + hundreds of dataset repos worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Dimensions Metrics API","u":"https://www.dimensions.ai/products/all-products/metrics-api/","co":"Dimensions","f":"Free for non-commercial citation metrics (registration/key)","p":"DSL/Analytics API subscription (quote)","b":"Article/dataset citation metrics, scientometrics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Dryad API (v2)","u":"https://datadryad.org/api/v2/docs/","co":"Datadryad","f":"Free, keyless for search/download; token for submit","p":"n/a","b":"Curated research datasets underlying published studies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EUDAT B2SHARE REST API","u":"https://docs.eudat.eu/b2share/httpapi/","co":"Eudat","f":"Free; public records keyless, OAuth token for deposit","p":"n/a","b":"European long-tail research data storing/publishing","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FAIRsharing API","u":"https://fairsharing.org/API_doc","co":"Fairsharing","f":"Free with registration; JWT login (username/password)","p":"n/a","b":"Registry of data standards, databases, repositories, policies","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Figshare API v2","u":"https://docs.figshare.com/","co":"Figshare","f":"Free, keyless for public metadata/files","p":"n/a","b":"Public research outputs, figures, datasets retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Harvard Dataverse Search API","u":"https://guides.dataverse.org/en/latest/api/search.html","co":"Dataverse","f":"Free, keyless public dataset/file search; token for restricted","p":"n/a","b":"Largest general-purpose academic dataset repository","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ICPSR Metadata Export API","u":"https://icpsr.github.io/metadata/icpsr_metadata_api/","co":"Icpsr","f":"Free; requires UMich account + API credentials for metadata export","p":"Institutional membership for restricted microdata","b":"Social/behavioral science archival dataset metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Kaggle Public API","u":"https://www.kaggle.com/docs/api","co":"Kaggle","f":"Free with key; list/download/create datasets","p":"n/a","b":"Community ML datasets and competitions access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mendeley Data Datasets API","u":"https://data.mendeley.com/api/docs/","co":"Mendeley","f":"Free; public datasets readable, OAuth for write","p":"n/a","b":"Elsevier-hosted research dataset repository, DOI-cited data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NASA PDS (Planetary Data System) API","u":"https://nasa-pds.github.io/pds-api/","co":"Nasa pds","f":"Free, keyless REST search over planetary science archives","p":"n/a","b":"Planetary mission datasets, products, collections discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/graph-api/","co":"OpenAIRE","f":"Free; basic keyless, register for higher limits","p":"n/a","b":"EU scholarly graph: datasets, software, projects, funders","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/how-to-use-the-api/api-overview","co":"OpenAlex","f":"Free, keyless; 100k req/day (polite pool via email)","p":"Premium/Pro plan for higher throughput & snapshots","b":"Open catalog of works incl. datasets, sources, authors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OSF API v2 (Open Science Framework)","u":"https://developer.osf.io/","co":"Osf","f":"Free; public read keyless, token/OAuth for write","p":"n/a","b":"Projects, preprints, files, registrations on OSF","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PANGAEA OAI-PMH / REST","u":"https://ws.pangaea.de/oai/","co":"Pangaea","f":"Free, keyless metadata harvesting and data access","p":"n/a","b":"Earth & environmental georeferenced datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"re3data API","u":"https://www.re3data.org/api/doc","co":"Re3data","f":"Free, keyless; CC0 metadata","p":"n/a","b":"Registry of 3000+ research data repositories, discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCI Machine Learning Repository API","u":"https://archive.ics.uci.edu/","co":"Uci","f":"Free, keyless; ucimlrepo Python pkg + dataset metadata endpoints","p":"n/a","b":"Classic benchmark ML datasets for research/teaching","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"World Bank Microdata Library API","u":"https://microdata.worldbank.org/api-documentation/catalog","co":"World Bank","f":"Free, keyless catalog/metadata API (NADA); key for restricted data requests","p":"n/a","b":"Survey & census microdata catalogs from developing countries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Zenodo REST API","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free; personal access token required for most endpoints (incl. records/search)","p":"n/a","b":"CERN-backed open repository: search/deposit datasets, software, papers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"}]},{"category":"Disaster, humanitarian & crisis data","count":28,"entries":[{"n":"ACAPS API (INFORM Severity, Humanitarian Access)","u":"https://api.acaps.org/","co":"Acaps","f":"Free w/ registration/token","p":"n/a","b":"Crisis severity index and humanitarian access data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ACLED (Armed Conflict Location & Event Data)","u":"https://acleddata.com/api-documentation/getting-started","co":"Acleddata","f":"Free w/ myACLED registration (non-commercial use only)","p":"Corporate / public-sector license on request","b":"Disaggregated political violence and protest events","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Copernicus EMS Rapid Mapping API","u":"https://rapidmapping.emergency.copernicus.eu/","co":"Copernicus","f":"Free, keyless OpenAPI/REST + ArcGIS REST/WMS layers","p":"n/a","b":"Satellite rapid-mapping activations for disasters","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EM-DAT International Disaster Database (CRED)","u":"https://www.emdat.be/","co":"Emdat","f":"Free w/ registration, non-commercial (portal + downloads; raw data via request)","p":"Commercial license on request","b":"Historical disaster occurrence and impact records since 1900","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EU ERCC Portal (DG ECHO Emergency Response Coordination Centre)","u":"https://erccportal.jrc.ec.europa.eu/","co":"European Commission","f":"Free, keyless map/product download API endpoints","p":"n/a","b":"EU civil-protection daily flash, active emergencies, ECHO maps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FEWS NET Data Warehouse (FDW) API","u":"https://help.fews.net/fdw/fews-net-api","co":"Fews","f":"Free, but requires account auth (session or token); not keyless","p":"n/a","b":"Famine early warning and food insecurity projections","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"GDACS (Global Disaster Alert & Coordination System)","u":"https://www.gdacs.org/gdacsapi/swagger/index.html","co":"Gdacs","f":"Free, keyless GeoJSON/JSON REST API + RSS/CAP feeds","p":"n/a","b":"Multi-hazard alerts: quakes, cyclones, floods, volcanoes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GDELT Project (DOC 2.0 / GEO / Events)","u":"https://blog.gdeltproject.org/gdelt-doc-2-0-api-debuts/","co":"Gdeltproject","f":"Free, no key (3-month rolling window, JSON)","p":"n/a","b":"Global news events, conflict & crisis monitoring","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HDX CKAN Data Platform (data.humdata.org)","u":"https://data.humdata.org/faqs/devs","co":"Humdata","f":"Free, keyless CKAN API for dataset metadata/files","p":"n/a","b":"Discovering and downloading humanitarian datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HDX HAPI (Humanitarian Data Exchange API)","u":"https://hdx-hapi.readthedocs.io/","co":"Readthedocs","f":"Free, no account; needs generated app_identifier","p":"n/a","b":"Standardized cross-source humanitarian indicators","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"IFRC GO API","u":"https://goadmin.ifrc.org/docs/","co":"Ifrc","f":"Free; public read is keyless, token only for non-public data","p":"n/a","b":"Red Cross emergency appeals and disaster operations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"INFORM Risk Index (EC JRC DRMKC)","u":"https://drmkc.jrc.ec.europa.eu/inform-index/","co":"European Commission","f":"Free, open data downloads (XLSX/PDF) + API","p":"n/a","b":"Country-level humanitarian crisis/disaster risk scores","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"IPC (Integrated Food Security Phase Classification) API","u":"https://www.ipcinfo.org/ipc-country-analysis/api/","co":"Ipcinfo","f":"Free w/ API key via request form","p":"n/a","b":"Acute food insecurity phase data, GeoJSON maps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"KoBoToolbox API","u":"https://support.kobotoolbox.org/api.html","co":"Kobotoolbox","f":"Free, account + API token; HXL-tagged data exports","p":"n/a","b":"Humanitarian field data collection and survey exports","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA Disasters Mapping Portal","u":"https://maps.disasters.nasa.gov/","co":"NASA","f":"Free, no login; ArcGIS REST + WMS GIS endpoints","p":"n/a","b":"Near-real-time geospatial disaster products","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"NASA EONET (Earth Observatory Natural Event Tracker)","u":"https://eonet.gsfc.nasa.gov/docs/v3","co":"NASA","f":"Free, keyless near-real-time event metadata","p":"n/a","b":"Curated natural event feed linked to satellite imagery","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA FIRMS (Fire Information for Resource Management)","u":"https://firms.modaps.eosdis.nasa.gov/api/","co":"NASA","f":"Free w/ MAP_KEY, ~5000 transactions/10-min","p":"n/a","b":"Near-real-time active fire/wildfire hotspots (MODIS/VIIRS)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NWS Alerts API (NOAA Common Alerting Protocol)","u":"https://www.weather.gov/documentation/services-web-alerts","co":"NWS (NOAA)","f":"Free, keyless CAP v1.2 / GeoJSON / ATOM alerts","p":"n/a","b":"Active US weather warnings and emergency alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OCHA Financial Tracking Service (FTS) API","u":"https://api.hpc.tools/docs/v2/","co":"Hpc","f":"Free, keyless public read endpoints (some endpoints use Basic auth)","p":"n/a","b":"Humanitarian funding flows by crisis/donor/agency","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenFEMA API","u":"https://www.fema.gov/about/openfema/api","co":"Fema","f":"Free, keyless REST API (no registration)","p":"n/a","b":"US federal disaster declarations and assistance data","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PetaBencana.id (Disaster Map Foundation)","u":"https://docs.petabencana.id/","co":"Petabencana","f":"Free, open API endpoints","p":"n/a","b":"Crowdsourced real-time urban flood/disaster reports (SE Asia)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ReliefWeb API (UN OCHA)","u":"https://apidoc.reliefweb.int/","co":"Reliefweb","f":"Free; pre-approved appname required since Nov 2025; 1000 calls/day","p":"n/a","b":"Humanitarian reports, disasters, jobs since 1981","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UCDP (Uppsala Conflict Data Program) API","u":"https://ucdp.uu.se/apidocs/","co":"Uu","f":"Free; token-based access (token by request), 5000 req/day","p":"n/a","b":"Organized violence and armed conflict datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UNHCR Refugee Statistics API","u":"https://api.unhcr.org/docs/refugee-statistics.html","co":"Unhcr","f":"Free, keyless REST/JSON","p":"n/a","b":"Refugee, asylum-seeker and IDP population statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS Earthquake FDSN / GeoJSON Feeds","u":"https://earthquake.usgs.gov/fdsnws/event/1/","co":"USGS","f":"Free, keyless real-time GeoJSON feeds","p":"n/a","b":"Real-time and historical earthquake catalog","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WFP HungerMap LIVE API","u":"https://docs-wfp-hungermap.netlify.app/docs/chatbot/data_retrievals/","co":"Hungermapdata","f":"Free, keyless JSON endpoints (adm0/adm1, IPC, PDC)","p":"n/a","b":"Near-real-time global food insecurity monitoring (95+ countries)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WHO Disease Outbreak News API","u":"https://www.who.int/api/news/diseaseoutbreaknews","co":"WHO","f":"Free, keyless RESTful API","p":"n/a","b":"Global disease outbreak/health emergency alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PDC DisasterAWARE (Pacific Disaster Center)","u":"https://www.pdc.org/disasteraware/","co":"Pdc","f":"none (DaaS/SaaS, partner/licensed access)","p":"Contact for licensing","b":"Multi-hazard early warning and risk analytics platform","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Drug databases & company pipelines","count":43,"entries":[{"n":"ASHP Drug Shortages API","u":"https://github.com/ASHP-Software/drugShortagesDoc","co":"ASHP Software","f":"ASHP publishes API documentation (GitHub) for its drug-shortage database (affected products, alternatives, therapeutic agents). Calls use auth={apiKey}.…","p":"Request an API key + licensing from softwaresupport@ashp.org (not openly self-serve).","b":"Pharmacist-oriented shortage intelligence (alternatives, management guidance) complementing FDA's shortage list","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BindingDB RESTful Web Services","u":"https://www.bindingdb.org/rwd/bind/BindingDBRESTfulAPI.jsp","co":"Bindingdb","f":"Free REST API (JSON/XML), confirmed. Endpoints: getLigandsByUniprot(s), getLigandsByPDBs, getTargetByCompound — query by UniProt/PDB/SMILES with affinity…","p":"None (open).","b":"Measured protein-small-molecule binding affinities for drug-target SAR and virtual screening","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ChEBI (Chemical Entities of Biological Interest) Web Services (EMBL-EBI)","u":"https://www.ebi.ac.uk/chebi/webServices.do","co":"EMBL-EBI","f":"Free, keyless. SOAP/REST web services + OLS API for the ChEBI ontology of small molecules incl. drugs; structures, roles (e.g. 'drug', 'antineoplastic…","p":"None (open).","b":"Ontology-grounded chemical/drug classification and roles; structured 'is-a-drug / has-role' relationships for compounds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ChEMBL Data Web Services (EMBL-EBI)","u":"https://www.ebi.ac.uk/chembl/api/data/docs","co":"EMBL-EBI","f":"Fully free, keyless REST API (JSON/XML). Self-documented endpoints: molecule, target, mechanism, drug, drug_indication, activity, assay. Live explorer +…","p":"None. Full database also free via FTP (SQLite/MySQL/PostgreSQL/SDF/RDF).","b":"Bioactivity + approved-drug mechanisms/indications at scale; the canonical open medicinal-chemistry/drug-target activity database","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinPGx (formerly PharmGKB) - Pharmacogenomics Knowledgebase","u":"https://www.clinpgx.org/","co":"Clinpgx","f":"Free. PharmGKB has migrated to ClinPGx (clinpgx.org; pharmgkb.org links redirect, merging PharmGKB + CPIC + PharmCAT). RESTful API serving JSON at…","p":"None (free; downloads carry a data-usage policy / no-redistribution terms).","b":"Pharmacogenomics: genotype-guided dosing, gene-drug response associations, FDA/EMA PGx label annotations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ClinPGx / CPIC API (pharmacogenomic dosing guidelines)","u":"https://cpicpgx.org/","co":"Cpicpgx","f":"Free, keyless REST API to the CPIC database (api.cpicpgx.org, PostgREST) — gene-drug pairs, CPIC clinical guidelines, allele functionality…","p":"None (open).","b":"Machine-readable genotype-to-prescribing recommendations (CPIC) for clinical decision support / PGx pipelines","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DailyMed RESTful Web Services (NLM)","u":"https://dailymed.nlm.nih.gov/dailymed/app-support-web-services.cfm","co":"NLM (NIH)","f":"Free, keyless REST API (v2). Base: dailymed.nlm.nih.gov/dailymed/services/v2/. Endpoints: /spls, /drugnames, /ndcs, /drugclasses, /rxcuis, /uniis. Filter…","p":"None.","b":"Authoritative FDA Structured Product Labels (full prescribing info, boxed warnings) by drug/NDC/class","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DGIdb - Drug-Gene Interaction Database (GraphQL API)","u":"https://dgidb.org/api","co":"Dgidb","f":"Free GraphQL API at https://dgidb.org/api/graphql (v5.0; replaced legacy REST endpoints). Drug-gene interactions, druggable-gene category annotations, drug &…","p":"None (open).","b":"Mapping drugs to gene/target interactions and druggable-genome categories for precision-medicine pipelines","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DGIdb — Drug-Gene Interaction Database (GraphQL API)","u":"https://dgidb.org/api","co":"Dgidb","f":"Free GraphQL API at dgidb.org/api/graphql (v5.0; POST queries). Drug-gene interactions, druggable-gene category annotations, drug & gene records. Python…","p":"None (open).","b":"Mapping drugs to gene/target interactions and druggable-genome categories for precision-medicine pipelines","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DrugBank (Clinical & Scientific APIs / data downloads)","u":"https://docs.drugbank.com/","co":"Drugbank","f":"Free CC0 Open Data subsets (DrugBank Vocabulary CSV; Structures SDF) at go.drugbank.com — no registration, commercial-OK. Free academic license for full…","p":"Commercial Clinical/Scientific API + full dataset: contact DrugBank sales for paid…","b":"Deeply curated drug monographs, interactions, targets/enzymes/transporters; gold-standard reference (commercial for full depth)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DrugCentral (UNM, BioClients API + OpenAPI/SMART-API + DB download)","u":"https://drugcentral.org/download","co":"Drugcentral","f":"Free. Public PostgreSQL DB dump (drugcentral.org/download, DockerHub container), full bulk data files. OpenAPI/SMART-API registered & validated on…","p":"None (CC-BY for academic/non-commercial; commercial use needs permission).","b":"Approved-drug compendium: structures -> targets -> pharmacological action -> indications; clean drug-target table","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DrugCentral (UNM, SMART-API/OpenAPI + bulk downloads)","u":"https://uxn2ycvimg.us-east-2.awsapprunner.com/docs","co":"Drugcentral","f":"Free. OpenAPI/SMART-API access (drugcentral.org/OpenAPI; registered on smart-api.info); full PostgreSQL DB dump + bulk data files (drug-target TSV…","p":"None (CC-BY for academic/non-commercial; commercial use needs permission).","b":"Approved-drug compendium: structures -> targets -> pharmacological action -> indications; clean drug-target table","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Drugs@FDA (openFDA drug/drugsfda + accessdata web app)","u":"https://open.fda.gov/apis/drug/drugsfda/","co":"openFDA","f":"Free via openFDA (drug/drugsfda.json): 28,000+ applications (NDA/ANDA/BLA), products, submissions, openfda identifiers. Also…","p":"None.","b":"Authoritative FDA approval history, application/submission timelines, marketing status by product","s":"In use","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EMA medicine data downloads + EPAR datasets","u":"https://www.ema.europa.eu/en/medicines/download-medicine-data","co":"European Union","f":"Free downloadable Excel tables of EU-authorized human/vet medicines, EPARs, orphan designations, shortages, withdrawals, paediatric plans. EMA's entire…","p":"None. (No fully documented official REST API; bulk tables + JSON files + open-data…","b":"EU centralized approvals, EPAR scientific assessments, EU orphan designations and supply shortages","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"FDA GSRS (Global Substance Registration System) API + UNII","u":"https://gsrs.ncats.nih.gov/api-documentation","co":"NIH","f":"Free REST API at gsrs.ncats.nih.gov/api/v1/ (OpenAPI docs at /api-documentation). Substance records, UNII identifiers, synonyms, external codes, chemical…","p":"None.","b":"Authoritative substance identity & UNII codes used across FDA-regulated products (links labels, structures, ingredients)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"FDA Orange Book Data Files (Approved Drug Products + patents/exclusivity)","u":"https://www.fda.gov/drugs/drug-approvals-and-databases/orange-book-data-files","co":"U.S. FDA","f":"Free downloadable ASCII/zip data files (products, patents, exclusivity, therapeutic equivalence ratings); updated monthly. No official API — bulk files only.","p":"None for FDA files. (Third-party scraper APIs and NBER 1985-2016 historical…","b":"Generic-equivalence (TE codes), patent expiry and exclusivity windows driving generic entry / patent-cliff analysis","s":"In use","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"FDA Orphan Drug Designations & Approvals (OOPD database)","u":"https://www.accessdata.fda.gov/scripts/opdlisting/oopd/","co":"U.S. FDA","f":"Free searchable web database; results exportable to Excel. Covers all FDA orphan-drug designations and approvals (rare-disease indications).","p":"None. No official API (web UI + Excel export; loadable into MyChem.info).","b":"US rare-disease / orphan-drug designations and approvals, by sponsor and indication","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"FDA Purple Book (licensed biologics, biosimilars, interchangeability)","u":"https://purplebooksearch.fda.gov/","co":"U.S. FDA","f":"Free searchable database (purplebooksearch.fda.gov) with bulk data download at /downloads. Covers CDER + CBER biologics, biosimilar/interchangeable status…","p":"None. No formal API (downloadable data files).","b":"Biologics & biosimilar landscape: reference products, interchangeability, biologic exclusivity dates","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Health Canada Drug Product Database (DPD)","u":"https://health-products.canada.ca/api/documentation/dpd-documentation-en.html","co":"Government of Canada","f":"Free, keyless REST API (health-products.canada.ca/api/drug/) returning JSON/XML: all human/vet/disinfectant products approved for sale in Canada — DIN…","p":"None.","b":"Authoritative Canadian marketed-drug registry (DIN-level) for cross-border product/regulatory coverage","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"IUPHAR/BPS Guide to PHARMACOLOGY (GtoPdb) Web Services","u":"https://www.guidetopharmacology.org/webServices.jsp","co":"Guidetopharmacology","f":"Free, keyless REST (JSON) at guidetopharmacology.org/services/ (confirmed). ~3,100 protein targets, 13,000+ ligands (approved drugs, small molecules…","p":"None (CC-BY-SA / open).","b":"Expert-curated drug-target pharmacology: quantitative ligand-target affinities and recommended pharmacological tools","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"KEGG DRUG / KEGG REST API","u":"https://www.kegg.jp/kegg/rest/keggapi.html","co":"Kegg","f":"Free, keyless REST API (rest.kegg.jp) for academic/non-commercial use. KEGG DRUG = unified drug entries (approved in Japan/US/Europe) with chemical…","p":"Commercial use / bulk FTP requires a paid KEGG subscription via Pathway Solutions /…","b":"Drug-target-pathway-disease linkage and drug metabolism/interaction networks with cross-region drug coverage","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyChem.info (BioThings drug/chemical API)","u":"https://mychem.info/","co":"Mychem","f":"Free, keyless high-performance REST API (mychem.info/v1) aggregating DrugBank, ChEMBL, DrugCentral, PubChem, ChEBI, Inxight, AEOLUS/FAERS, GtoPdb and more…","p":"None (open; part of NCATS Biomedical Data Translator / BioThings).","b":"One-stop programmatic drug annotation + cross-source ID resolution without integrating each source separately","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyChem.info (BioThings) drug/chemical annotation API","u":"https://mychem.info/","co":"Mychem","f":"Free, keyless REST API at https://mychem.info/v1 (annotation + query services; JSON). Aggregates DrugBank, ChEMBL, ChEBI, PharmGKB/ClinPGx, DrugCentral…","p":"None.","b":"One-call aggregated drug/chemical annotation and ID cross-referencing across many sources via a single JSON API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NCATS Inxight Drugs API","u":"https://drugs.ncats.io/","co":"Ncats","f":"Free, keyless REST API at drugs.ncats.io/api/v1 (confirmed live — /api/v1/substances returns paginated JSON, ~167,000 substance records). Substances per ISO…","p":"None.","b":"Rigorous substance definitions + development/regulatory status spanning approved through investigational drugs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"nSIDES / OffSIDES & TwoSIDES (Tatonetti Lab)","u":"https://nsides.io/","co":"Nsides","f":"Free downloadable databases of drug side effects (OffSIDES) and drug-drug-interaction side effects (TwoSIDES) derived from FAERS via statistical signal…","p":"None (open, research use).","b":"Off-label / polypharmacy adverse-event and drug-drug-interaction signals beyond labeled effects","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"nSIDES — OnSIDES / OffSIDES & TwoSIDES (Tatonetti Lab)","u":"https://nsides.io/","co":"Nsides","f":"Free CSV flat files (also MySQL/SQLite schemas, GitHub Releases). OnSIDES (current flagship): 3.6M+ drug-ADR pairs for 2,793 ingredients extracted from drug…","p":"None (open, research use).","b":"Off-label / polypharmacy adverse-event and drug-drug-interaction signals beyond labeled effects","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Open Targets Platform GraphQL API","u":"https://platform-docs.opentargets.org/data-access/graphql-api","co":"Opentargets","f":"Free, keyless GraphQL API at api.platform.opentargets.org/api/v4/graphql with interactive browser/playground (confirmed live). /drug endpoint = mechanisms of…","p":"None. Bulk access via EMBL-EBI FTP, Google BigQuery public dataset (first 1 TB/month…","b":"Drug-to-target-to-disease evidence graph; systematic target identification & drug repurposing queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openFDA Drug APIs (Drugs@FDA, NDC, FAERS adverse events, labeling, enforcement/recalls, drug shortages)","u":"https://open.fda.gov/apis/drug/","co":"openFDA","f":"Free, fully open. Keyless works at 240 req/min & 1,000 req/day per IP. Endpoints: drug/drugsfda.json, drug/ndc.json, drug/event.json (FAERS), drug/label.json…","p":"No paid tier. Free API key raises limits to 240 req/min & 120,000 req/day.","b":"Single richest US gov drug source: approvals/applications, NDC product directory, adverse-event reports, structured labels, recalls, and drug…","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Orphanet / Orphadata (rare diseases & orphan drugs) + ORPHAcode API","u":"https://www.orphadata.com/","co":"Orphadata","f":"Free downloadable datasets (XML/JSON, CC BY 4.0, updated twice yearly Jul/Dec) incl. an inventory of orphan drugs at all dev stages cross-linked to diseases.…","p":"None for CC BY 4.0 core datasets; some aggregated/bulk feeds require contacting Orphadata.","b":"European rare-disease ontology + orphan-drug development inventory linked to ORPHAcodes","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PharmGKB / ClinPGx — Pharmacogenomics Knowledgebase","u":"https://www.clinpgx.org/","co":"Clinpgx","f":"Free. NOTE: PharmGKB rebranded to ClinPGx — pharmgkb.org links auto-redirect to clinpgx.org since 30 Jul 2025. Bulk downloads + web services of curated…","p":"None (free; no redistribution).","b":"Pharmacogenomics: genotype-guided dosing, gene-drug response associations, FDA/EMA PGx label annotations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pharos / Target Central Resource Database (TCRD) GraphQL API (NCATS IDG)","u":"https://pharos.nih.gov/api","co":"NIH","f":"Free GraphQL API + Playground for Pharos (confirmed GraphQL, not REST); underlying TCRD downloadable as full SQL DB + CSV. Targets ranked by development…","p":"None.","b":"Druggable-genome target intelligence; which targets have approved drugs (Tclin) vs are understudied","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Probes & Drugs Portal","u":"https://www.probes-drugs.org/","co":"Probes drugs","f":"Free public portal (v02.2025, ~155k compounds, 13.5k targets) integrating ChEMBL, BindingDB, GtoPdb, DrugCentral, DrugBank drug sets + clinical-trial…","p":"None (open).","b":"Unified, deduplicated view of the bioactive-compound / drug landscape with provenance across major sources","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PubChem PUG-REST & PUG-View (NIH/NCBI)","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless REST. Compound/substance/assay/gene/protein/pathway records, properties, structure search, synonyms. PUG-View for annotated drug pages. Limit…","p":"None.","b":"Chemical structures, computed properties, identifiers and cross-refs for drug compounds at massive scale","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RxNorm / RxNav APIs (NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/RxNormAPIs.html","co":"NLM (NIH)","f":"Free, keyless REST (XML/JSON) at rxnav.nlm.nih.gov. Includes RxNorm, RxClass, RxTerms, RxNorm interaction, NDC/RXCUI mapping, approximate-match. Updated…","p":"None. (One exception: proprietary-name source data needs UMLS license.)","b":"Normalized drug nomenclature, ingredient/brand mapping, NDC<->RXCUI, drug classes; the US standard clinical drug vocabulary","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SIDER - Side Effect Resource (EMBL)","u":"http://sideeffects.embl.de/","co":"Embl","f":"Free downloadable flat files (SIDER 4.1, released Oct 2015: 1,430 drugs, 5,880 ADRs, 140,064 drug-ADR pairs with MedDRA terms; frequencies incl. placebo…","p":"None (open download; no live API).","b":"Drug side-effect / adverse-reaction associations and frequencies mined from package inserts (research)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"SIDER — Side Effect Resource (EMBL)","u":"http://sideeffects.embl.de/download/","co":"Embl","f":"Free downloadable flat TSV files at sideeffects.embl.de/download/ (SIDER 4.1, released 2015: ~1,430 drugs, ADRs, drug-ADR pairs with frequencies incl.…","p":"None (open download; no live API).","b":"Drug side-effect / adverse-reaction associations and frequencies mined from package inserts (research)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Therapeutic Target Database (TTD)","u":"https://idrblab.org/ttd/","co":"Idrblab","f":"Free, no login. Full + batch download of search results (target IDs / drug IDs); flat files at db.idrblab.net/ttd (redirects to ttd.idrblab.cn). TTD 2024…","p":"None. (Web UI + downloadable flat files; no formal REST API.)","b":"Target druggability staging (approved vs clinical vs preclinical) mapped to drugs and diseases","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"UniChem (EMBL-EBI) chemical identifier cross-referencing API","u":"https://chembl.gitbook.io/unichem","co":"Gitbook","f":"Free, keyless REST. UniChem 2.0 base: ebi.ac.uk/unichem/api/v1/ (POST); legacy ebi.ac.uk/unichem/rest/. Maps a compound identifier/InChI across ChEMBL…","p":"None.","b":"Glue layer: translate drug/compound IDs across every major chemistry & drug database via Standard InChI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WHO ATC/DDD Index (WHOCC)","u":"https://atcddd.fhi.no/atc_ddd_index/","co":"Fhi","f":"Free searchable online ATC classification + Defined Daily Doses by substance/ATC level. No API.","p":"Full electronic ATC/DDD index file sold by WHOCC for a fee (order via WHOCC).","b":"Global drug classification (ATC codes) and DDD units for drug-utilization/consumption analytics","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Citeline Pharmaprojects (commercial pipeline intelligence)","u":"https://www.citeline.com/en/products-services/clinical/pharmaprojects","co":"Citeline","f":"None — subscription product (40+ yr R&D tracker; 90,000+ drug profiles, ~20,000 active; searchable by company/disease/phase/target). Pharmaprojects+ next-gen…","p":"Enterprise subscription; contact Citeline sales for pricing & API.","b":"Authoritative global pharma R&D pipeline tracking by company, target, and development phase","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Clarivate Cortellis (commercial life-sciences intelligence)","u":"https://www.cortellis.com/","co":"Cortellis","f":"None — subscription. Integrates global drug pipeline, clinical trials, regulatory tracking, patents/generics, deals & licensing, safety. Cortellis APIs…","p":"Enterprise subscription + API; contact Clarivate sales for quote.","b":"End-to-end competitive intelligence: pipeline + regulatory + IP + deals in one licensed platform/API","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"GlobalData Pharmaceutical Intelligence (Pipeline & Marketed Drugs)","u":"https://www.globaldata.com/marketplace/dataset/pipeline-marketed-drugs/","co":"Globaldata","f":"None — commercial dataset/platform. Company profiles (M&A history), drug profiles (pipelines, trials, regulatory milestones, biomarkers). Data licensing /…","p":"Subscription / dataset license; contact GlobalData for pricing & data feed/API.","b":"Combined company + drug pipeline + marketed-drug commercial intelligence with forecasting","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Springer Nature AdisInsight (commercial drug/pipeline tracker)","u":"https://adisinsight.springer.com/","co":"Springer","f":"None — subscription (site is auth-gated, confirmed). Editor-authored profiles of drugs/vaccines/diagnostics discovery-to-launch, clinical trials, deals…","p":"Institutional/corporate subscription; API access per license (contact Springer Nature).","b":"Curated narrative drug-development histories, deals/licensing, and safety case reports across all indications","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Drug regulatory, approvals, labels & adverse events","count":39,"entries":[{"n":"Australia TGA Database of Adverse Event Notifications (DAEN) - Medicines","u":"https://daen.tga.gov.au/medicines-search/","co":"Tga","f":"Free, no key. Public web search of Australian medicine/vaccine adverse event reports (from 1 Jan 1971, current to ~14 days prior). Datasets also at…","p":"Free.","b":"Australian adverse event notifications for medicines, vaccines and biologicals - APAC pharmacovigilance view.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"BiopharmaCatalyst FDA / PDUFA Calendar","u":"https://www.biopharmcatalyst.com/calendars/fda-calendar","co":"Biopharmcatalyst","f":"Free web FDA/PDUFA calendar (upcoming PDUFA target dates, AdComm meetings, catalysts). Limited free access.","p":"Paid Premium/Pro subscription for full catalyst data, alerts and export; programmatic…","b":"Forward-looking FDA decision dates (PDUFA), advisory committee meetings and biotech regulatory catalysts.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BioPharmCatalyst FDA / PDUFA Calendar","u":"https://www.biopharmcatalyst.com/calendars/fda-calendar","co":"Biopharmcatalyst","f":"Free web FDA/PDUFA calendar (upcoming PDUFA target dates, AdComm meetings, catalysts) with limited free access.","p":"Paid premium subscription for full catalyst data, alerts and export; programmatic…","b":"Forward-looking FDA decision dates (PDUFA), advisory committee meetings and biotech regulatory catalysts.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Canada Vigilance (CVP) Adverse Reaction API","u":"https://health-products.canada.ca/api/documentation/cvp-documentation-en.html","co":"Government of Canada","f":"Free, no key. REST, base https://health-products.canada.ca/api/canada-vigilance/. JSON/XML endpoints: Report, Reaction, ReportDrug, DrugProduct, Seriousness…","p":"Free.","b":"Canadian (MedEffect) suspected adverse reaction case reports - non-US pharmacovigilance comparison/signal work.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Canada Vigilance Product (CVP) Adverse Reaction API","u":"https://health-products.canada.ca/api/documentation/cvp-documentation-en.html","co":"Government of Canada","f":"Free, no key. REST, base https://health-products.canada.ca/api/canada-vigilance/. JSON (default) / XML; endpoints: Report, Reaction, ReportDrug, Seriousness…","p":"Free.","b":"Canadian (MedEffect) suspected adverse reaction case reports - non-US pharmacovigilance comparison/signal work.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DailyMed RESTful Web Services (NLM SPL labels)","u":"https://dailymed.nlm.nih.gov/dailymed/webservices-help/v2/spls_api.cfm","co":"NLM (NIH)","f":"Free, no key. REST v2 API, base https://dailymed.nlm.nih.gov/dailymed/services/v2/ (verified). Endpoints: /spls, /ndcs, /drugnames, /drugclasses…","p":"Free.","b":"Authoritative current SPL drug labels and label metadata by NDC, name, setid, application number, RxCUI or UNII.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DrugBank API (drug data / interactions / pricing)","u":"https://docs.drugbank.com/","co":"Drugbank","f":"Free academic license for qualifying non-commercial use (apply to access); free website browsing at go.drugbank.com. No anonymous public API tier. REST…","p":"Paid commercial license required for all non-academic use; Clinical/DDI API covers…","b":"Enriched drug reference data - drug-drug interactions with severity/management, pharmacology, pricing, identifiers.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EMA Download Medicine Data (EPAR tables)","u":"https://www.ema.europa.eu/en/medicines/download-medicine-data","co":"European Union","f":"Free, no key. Excel/spreadsheet data tables of all EMA-assessed human & veterinary medicines (EPAR status, authorization, active substance, ATC, MA holder…","p":"Free.","b":"Bulk EU centrally-authorized medicines list and EPAR metadata for tracking European approvals/withdrawals/shortages.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EMA SPOR (OMS/RMS) APIs","u":"https://www.ema.europa.eu/en/human-regulatory-overview/research-development/data-medicines-iso-idmp-standards-overview/substance-product-organisation-referential-spor-master-data","co":"European Union","f":"OMS (organisations) and RMS (referentials) browsable/queryable free via SPOR portal REST API as guest (SPOR API v1; v2 FHIR-based). PMS (products) and SMS…","p":"Free for public OMS/RMS lists; full PMS/SMS access tied to EU regulatory…","b":"IDMP master data - harmonized EU organisation and referential identifiers (and emerging FHIR product/substance) via REST.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EMA SPOR (PMS/SMS/OMS/RMS) APIs","u":"https://www.ema.europa.eu/en/human-regulatory-overview/research-development/data-medicines-iso-idmp-standards-overview/substance-product-organisation-referential-spor-master-data","co":"European Union","f":"OMS (organisations) and RMS (referentials) browsable/queryable free via the SPOR portal REST API as a guest (no login for public data). PMS (products…","p":"Free for public lists; full PMS/SMS access tied to EU regulatory roles/registration.","b":"IDMP master data - harmonized EU organisation, referential, substance and (emerging FHIR) product identifiers.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EU Clinical Trials Information System (CTIS) Public API","u":"https://euclinicaltrials.eu/ctis-public/search","co":"Euclinicaltrials","f":"Free, no key. Undocumented but usable public endpoint: POST https://euclinicaltrials.eu/ctis-public-api/search (overview) and GET…","p":"Free.","b":"EU clinical trial protocol/status data under the Clinical Trials Regulation (successor to EudraCT/EU-CTR).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EU Clinical Trials Register / EudraCT (legacy)","u":"https://www.clinicaltrialsregister.eu/","co":"Clinicaltrialsregister","f":"Free, no key. Public search + plain-text export (limit 20 records/download) of EU/EEA interventional trial protocols and summary results; 44,000+ EudraCT…","p":"Free.","b":"Historical EU trial protocols and results (pre-CTIS) for European drug development history.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EudraVigilance European ADR Reports Portal (adrreports.eu)","u":"https://www.adrreports.eu/en/eudravigilance.html","co":"Adrreports","f":"Free, no key. Public web reports of aggregated EU suspected adverse reaction (ICSR) counts for EEA-authorized medicines, in 26 languages. No public REST API…","p":"Free (full EudraVigilance Level 2/3 access restricted to regulators/MAHs).","b":"EU-side adverse drug reaction aggregate counts by medicine/active substance - European complement to FAERS.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FDA Data Dashboard API (inspections, compliance, citations, imports)","u":"https://datadashboard.fda.gov/oii/api/index.htm","co":"U.S. FDA","f":"Free but credentials required (Authorization-User email + Authorization-Key headers). Base: https://api-datadashboard.fda.gov/v1/<endpoint>. POST endpoints…","p":"Free; obtain API key via the FDA OII Unified Logon application.","b":"FDA inspection classifications, citations, compliance/enforcement actions and import refusals - regulatory enforcement intelligence. Note: no…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FDA Data Dashboard API (inspections, compliance, recalls, imports)","u":"https://datadashboard.fda.gov/oii/api/index.htm","co":"U.S. FDA","f":"Free but credentials required. Base: https://api-datadashboard.fda.gov/v1/<endpoint> (e.g. /compliance_actions, /inspections). Auth via Authorization-User…","p":"Free; obtain API key by applying via FDA OII Unified Logon application.","b":"FDA inspection classifications, warning letters, injunctions/seizures, citations, recalls and import data - regulatory/enforcement intelligence.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FDA FAERS / AEMS Public Dashboard","u":"https://www.fda.gov/drugs/questions-and-answers-fdas-adverse-event-reporting-system-faers/fda-adverse-event-reporting-system-faers-public-dashboard","co":"U.S. FDA","f":"Free, no key. Interactive web dashboard (data 1968-present), updated quarterly. No REST API; export from dashboard. FDA has rebranded it the AEMS Public…","p":"Free.","b":"Quick interactive exploration/visualization of FAERS adverse event counts by drug, reaction, demographics without coding.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA FAERS Quarterly Data Files (bulk download)","u":"https://www.fda.gov/drugs/fdas-adverse-event-reporting-system-faers/faers-quarterly-data-files-documentation","co":"U.S. FDA","f":"Free, no key. Bulk ASCII ($-delimited) and XML quarterly extracts (DEMO/DRUG/REAC/OUTC/RPSR/THER/INDI tables) keyed by caseid/drug_seq, 2004 to current…","p":"Free.","b":"Full raw FAERS case-level data for pharmacovigilance/signal-detection beyond the openFDA-annotated subset (back to 2004, complete fields).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA FAERS/AEMS Public Dashboard","u":"https://www.fda.gov/drugs/fda-adverse-event-monitoring-system-aems/fda-adverse-event-monitoring-system-aems-public-dashboard","co":"U.S. FDA","f":"Free, no key. Interactive web dashboard (data 1969-present, updated daily/real-time since Aug 2025). No REST API; export from dashboard. Widget host…","p":"Free.","b":"Quick interactive exploration/visualization of adverse event counts by drug, reaction, demographics without coding.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA FAERS/AEMS Quarterly Data Files (bulk download)","u":"https://www.fda.gov/drugs/fda-adverse-event-monitoring-system-aems/faers-quarterly-data-files-documentation","co":"U.S. FDA","f":"Free, no key. Bulk ASCII ($-delimited) and XML quarterly extracts (DEMO/DRUG/REAC/OUTC/RPSR/THER/INDI tables) keyed by caseid/drug_seq. Download portal…","p":"Free.","b":"Full raw FAERS/AEMS case-level data for pharmacovigilance/signal-detection beyond the openFDA-annotated subset (back to 2004, complete fields).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA Global Substance Registration System (GSRS) API","u":"https://gsrs.ncats.nih.gov/","co":"NIH","f":"Free, no key. REST API, base https://gsrs.ncats.nih.gov/api/v1/ (e.g. /substances). JSON; 170,000+ substances with UNII identifiers, names/synonyms, codes…","p":"Free.","b":"Authoritative UNII / substance reference data - resolving active ingredients, mapping UNII<->name<->structure that underpins SPL/DailyMed and NDC…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA Global Substance Registration System (GSRS) REST API","u":"https://gsrs.ncats.nih.gov/ginas/app/ui","co":"NIH","f":"Free, no key. Public REST API base https://gsrs.ncats.nih.gov/api/v1/ (substances, names, codes, structures for 170,000+ registered substances; ISO 11238).…","p":"Free.","b":"Authoritative substance/ingredient registration data and UNII generation - chemistry-level identity behind FDA labels and approvals (net-new vs…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA Orange Book Data Files (Approved Drug Products w/ TE Evaluations)","u":"https://www.fda.gov/drugs/drug-approvals-and-databases/orange-book-data-files","co":"U.S. FDA","f":"Free, no key. Monthly tilde-delimited ASCII files (products.txt, patent.txt, exclusivity.txt) in a .zip. Also mirrored on data.gov/healthdata.gov.","p":"Free.","b":"Therapeutic equivalence ratings, generic reference products, plus patent and exclusivity data for small-molecule drugs.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA Purple Book (Licensed Biological Products) Data Download","u":"https://purplebooksearch.fda.gov/downloads","co":"U.S. FDA","f":"Free, no key. Searchable database with full CSV data downloads (monthly purplebook-search data-download.csv, e.g.…","p":"Free.","b":"FDA-licensed biologics, biosimilars and interchangeables - reference product exclusivity, biosimilarity/interchangeability status, BLA numbers.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA REMS Public Dashboard (Risk Evaluation & Mitigation Strategies)","u":"https://www.fda.gov/drugs/risk-evaluation-and-mitigation-strategies-rems/risk-evaluation-and-mitigation-strategy-rems-public-dashboard","co":"U.S. FDA","f":"Free, no key. Interactive dashboard (REMS programs 2008-present, updated weekly) with export; eight views (active REMS, ETASU, shared-system, modifications…","p":"Free.","b":"Tracking which drugs have an approved REMS, REMS elements/ETASU, modifications and released programs.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Health Canada Drug Product Database (DPD) API","u":"https://health-products.canada.ca/api/documentation/dpd-documentation-en.html","co":"Government of Canada","f":"Free, no key. REST, base https://health-products.canada.ca/api/drug/ (endpoints: drugproduct, activeingredient, company, form, packaging, etc.). JSON…","p":"Free.","b":"Canadian approved/marketed/cancelled drug products - DIN, ingredients, company, status, schedule, dosage form.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Japan PMDA Drug Information (package inserts / review reports)","u":"https://www.pmda.go.jp/english/review-services/reviews/approved-information/drugs/0001.html","co":"Go","f":"Free, no key. Searchable Japanese package inserts, English-translated package inserts, review reports and approved product lists; bulk download for…","p":"Free.","b":"Japanese approved drug information, package inserts and review (assessment) reports - third major-market regulatory source.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MedDRA (Medical Dictionary for Regulatory Activities)","u":"https://www.meddra.org/","co":"Meddra","f":"Free subscription for all regulators worldwide, academics, healthcare providers and non-profits (MSSO; JMO nominal cost for Japan). Bi-annual releases (Mar 1…","p":"Industry subscription priced by company revenue; tiers incl. system developers.","b":"Standardized regulatory adverse-event terminology underpinning FAERS/EudraVigilance/VigiBase coding and mapping.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"openFDA CAERS (Food/Dietary Supplement/Cosmetic Adverse Events) API","u":"https://open.fda.gov/apis/food/event/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/food/event.json. CFSAN adverse events from Jan 2004; max limit 1000/call. Raw CSV…","p":"Free; API key raises cap to 120,000 req/day per key.","b":"Adverse events / complaints for foods, dietary supplements and cosmetics - adjacent safety surveillance beyond Rx drugs.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Adverse Events (FAERS) API","u":"https://open.fda.gov/apis/drug/event/","co":"openFDA","f":"Free, keyless: 240 req/min and 1,000 req/day per IP. Base: https://api.fda.gov/drug/event.json. JSON; data from FAERS/AEMS 2004-present, updated quarterly.","p":"Free; with free API key 240 req/min and 120,000 req/day per key. Contact openFDA for…","b":"Querying FDA adverse event / medication error reports programmatically (drug side effects, product use errors, therapeutic failures) with field…","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Enforcement / Recalls API","u":"https://open.fda.gov/apis/drug/enforcement/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/drug/enforcement.json. Recall Enterprise System records 2004-present, updated…","p":"Free; API key raises cap to 120,000 req/day per key.","b":"Drug recall enforcement reports - classification (Class I/II/III), reason, distribution, recalling firm.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Product Labeling (SPL) API","u":"https://open.fda.gov/apis/drug/label/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/drug/label.json. Rx and OTC labels split into sections (indications, adverse…","p":"Free; API key raises daily cap to 120,000 req/day per key.","b":"Structured Product Labeling content for approved drugs - prescribing info, warnings, indications, dosage - in JSON.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Shortages API","u":"https://open.fda.gov/apis/drug/drugshortages/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/drug/shortages.json (verified). Max limit 100/call. Bulk JSON download.","p":"Free; API key raises cap to 120,000 req/day per key.","b":"Current and resolved drug supply disruptions - status, reason, update type, presentation.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drugs@FDA Approvals API","u":"https://open.fda.gov/apis/drug/drugsfda/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/drug/drugsfda.json. Approved products since 1939; max limit 99/call. Bulk JSON…","p":"Free; API key raises cap to 120,000 req/day per key.","b":"FDA approval records - application numbers (NDA/ANDA/BLA), sponsor, approval dates, submissions, products.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA NDC Directory API","u":"https://open.fda.gov/apis/drug/ndc/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/drug/ndc.json. Updated daily; max limit 100/call. Bulk JSON download available.","p":"Free; API key raises cap to 120,000 req/day per key.","b":"National Drug Code lookups - labeler/product/package identifiers, dosage form, route, marketing status.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Substance Data API (GSRS/UNII)","u":"https://open.fda.gov/apis/other/substance/","co":"openFDA","f":"Free, keyless: 240 req/min, 1,000 req/day per IP. Base: https://api.fda.gov/other/substance.json. JSON; UNII codes, names, codes, structures from FDA…","p":"Free; API key raises cap to 120,000 req/day per key.","b":"Resolving UNII unique ingredient identifiers and substance master data linking labels, RxNorm and SPL - net-new substance-level lookup.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RxNorm / RxNav REST APIs (NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/index.html","co":"NLM (NIH)","f":"Free, no key. REST APIs: RxNorm, RxClass, RxTerms, Prescribable RxNorm, RxNorm Interaction (note: live drug-drug interaction API retired Jan 2024), plus…","p":"Free.","b":"Normalizing drug names/codes (RxCUI), mapping NDC<->RxNorm<->name, drug classes, ingredient relationships.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UK MHRA Products (SPC/PIL/PAR) Database","u":"https://products.mhra.gov.uk/","co":"UK Government","f":"Free, no key. Public search of UK medicine SmPCs, Patient Information Leaflets and Public Assessment Reports by product/PL number/active substance. No…","p":"Free.","b":"UK (post-Brexit) authorized medicine labeling and assessment reports - PL numbers, SmPC/PIL/PAR documents.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO UMC VigiBase Data Access (full ICSR database)","u":"https://who-umc.org/vigibase/vigibase-faqs/","co":"Who umc","f":"No open/free programmatic tier for general public; access is request/contract-based.","p":"Free to PIDM member national centres; fee-based licenses (incl. VigiLyze, custom…","b":"Authoritative case-level global pharmacovigilance data and signal-detection (vigiRank) - regulatory/industry safety teams.","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"WHO VigiAccess (VigiBase public portal)","u":"https://www.vigiaccess.org/","co":"Vigiaccess","f":"Free, no key. Public web search of aggregated VigiBase global ICSR counts by medicinal/substance name (reaction groups, age, sex, region, year). Web UI; no…","p":"Full VigiBase data access via Uppsala Monitoring Centre: free to PIDM member states…","b":"Global (WHO) pharmacovigilance counts spanning 180+ countries / 40M+ reports - broadest international adverse-event aggregate view.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Earth, Geology & Atmospheric sciences","count":31,"entries":[{"n":"AirNow API (US EPA)","u":"https://docs.airnowapi.org/","co":"Airnowapi","f":"Free w/ key","p":"n/a","b":"US/Canada/Mexico AQI observations and forecasts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Copernicus Data Space Ecosystem (Sentinel Hub APIs)","u":"https://dataspace.copernicus.eu/analyse/apis/sentinel-hub","co":"Copernicus","f":"Free tier w/ account (quota)","p":"~EUR 30/mo","b":"Sentinel/Landsat imagery processing, STAC, statistics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EMSC SeismicPortal Web Services + WebSocket","u":"https://www.seismicportal.eu/webservices.html","co":"Seismicportal","f":"Free, keyless","p":"n/a","b":"Euro-Med earthquake catalog, real-time WS feed","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EPA Air Quality System (AQS) API","u":"https://aqs.epa.gov/aqsweb/documents/data_api.html","co":"U.S. EPA","f":"Free w/ key (email signup)","p":"n/a","b":"Regulatory-grade historical US air monitoring data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GeoNames Web Services","u":"https://www.geonames.org/export/web-services.html","co":"Geonames","f":"Free w/ username (rate-limited)","p":"paid commercial credits","b":"Toponyms, elevation (SRTM), timezone, geocoding","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GFZ GEOFON Web Services","u":"https://geofon.gfz.de/waveform/webservices/","co":"Gfz","f":"Free, keyless","p":"n/a","b":"Global seismic waveforms, FDSN event bulletin, SeedLink","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GFZ Kp Index / Geomagnetic Indices Web Service","u":"https://kp.gfz-potsdam.de/en/data","co":"Gfz potsdam","f":"Free, keyless","p":"n/a","b":"Kp, ap, Hp30/Hp60 geomagnetic activity indices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GPXZ Elevation API","u":"https://www.gpxz.io/","co":"Gpxz","f":"Free tier w/ key (daily limit)","p":"paid plans","b":"High-accuracy global elevation, Google-API drop-in","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IRIS / EarthScope FDSN Web Services (SAGE)","u":"https://service.iris.edu/","co":"Iris","f":"Free, keyless","p":"n/a","b":"Seismic waveforms, station metadata, event catalogs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Macrostrat API","u":"https://macrostrat.org/api","co":"Macrostrat","f":"Free, keyless","p":"n/a","b":"Geologic map units, stratigraphy, lithology, ages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA Earthdata CMR","u":"https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html","co":"NASA","f":"Free, keyless search (token for some)","p":"n/a","b":"Discovering NASA Earth science collections/granules","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA GIBS (Global Imagery Browse Services)","u":"https://nasa-gibs.github.io/gibs-api-docs/","co":"NASA","f":"Free, keyless","p":"n/a","b":"WMTS/WMS satellite imagery tiles, 1000+ layers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA POWER","u":"https://power.larc.nasa.gov/api/pages/","co":"NASA","f":"Free, keyless","p":"n/a","b":"Solar, meteorological, agroclimatology time series anywhere","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NOAA CO-OPS Tides & Currents API","u":"https://api.tidesandcurrents.noaa.gov/api/prod/","co":"NOAA","f":"Free, keyless","p":"n/a","b":"Water levels, tide predictions, currents, met data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NOAA NCEI Geomagnetic Field Calculators (WMM/IGRF)","u":"https://www.ngdc.noaa.gov/geomag/CalcSurvey.shtml","co":"NOAA","f":"Free w/ registration","p":"n/a","b":"Magnetic declination from WMM/IGRF (JSON/CSV/XML)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NOAA NDBC (National Data Buoy Center) Data","u":"https://www.ndbc.noaa.gov/faq/rt_data_access.shtml","co":"NOAA","f":"Free, keyless (HTTP/FTP)","p":"n/a","b":"Real-time buoy met/ocean observations, waves, SST","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NOAA SWPC JSON","u":"https://www.swpc.noaa.gov/content/data-access","co":"NOAA","f":"Free, keyless","p":"n/a","b":"Solar wind, Kp, aurora (OVATION) space-weather feeds","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open-Elevation API","u":"https://open-elevation.com/","co":"Open elevation","f":"Free, keyless (public instance, best-effort)","p":"self-host (open source)","b":"Simple SRTM-based global elevation lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open-Meteo Air Quality API","u":"https://open-meteo.com/en/docs/air-quality-api","co":"Open meteo","f":"Free, keyless (non-commercial)","p":"~EUR 29/mo (commercial)","b":"CAMS-based PM, gases, pollen, dust forecasts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAQ Air Quality API","u":"https://docs.openaq.org/","co":"Openaq","f":"Free w/ key","p":"n/a","b":"Global open air-quality station measurements","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenTopography API","u":"https://portal.opentopography.org/apidocs/","co":"Opentopography","f":"Free w/ API key","p":"n/a (OT+ donation tier)","b":"Global DEMs and lidar point cloud data access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USDA NRCS Soil Data Access (SDA) Web Service","u":"https://sdmdataaccess.nrcs.usda.gov/","co":"U.S. USDA","f":"Free, keyless","p":"n/a","b":"SSURGO soil survey tabular/spatial queries (REST/SOAP)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Earthquake Catalog (FDSN Event / GeoJSON, ComCat)","u":"https://earthquake.usgs.gov/fdsnws/event/1/","co":"USGS","f":"Free, keyless","p":"n/a","b":"Real-time and historical earthquake events, ShakeMap, ComCat","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS EROS Machine-to-Machine (M2M) API","u":"https://m2m.cr.usgs.gov/","co":"USGS","f":"Free w/ approved account","p":"n/a","b":"Searching/downloading Landsat and 300+ USGS datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USGS NSHMP-HAZ Web Services","u":"https://earthquake.usgs.gov/nshmp-haz-ws/","co":"USGS","f":"Free, keyless","p":"n/a","b":"Seismic hazard curves, design ground motions, GMMs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Real-time Earthquake GeoJSON Feeds","u":"https://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php","co":"USGS","f":"Free, keyless","p":"n/a","b":"Auto-updating quake summary/detail feeds for apps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS ScienceBase Catalog REST API","u":"https://www.usgs.gov/sciencebase-instructions-and-documentation/api-and-web-services","co":"USGS","f":"Free, keyless (read)","p":"n/a","b":"Discovering USGS scientific data/items as JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS The National Map (TNM Access) + EPQS Elevation","u":"https://tnmaccess.nationalmap.gov/api/v1/docs","co":"Nationalmap","f":"Free, keyless","p":"n/a","b":"US topo products, 3DEP elevation point queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS Volcano Hazards Program API","u":"https://volcanoes.usgs.gov/vsc/api/","co":"USGS","f":"Free, keyless","p":"n/a","b":"Volcano alerts (HANS), observatory data, HVO webcams","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Water Data APIs (OGC API / SensorThings)","u":"https://api.waterdata.usgs.gov/docs/","co":"USGS","f":"Free, keyless","p":"n/a","b":"Streamflow, gage height, groundwater, site metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Air Quality Index (WAQI / aqicn)","u":"https://aqicn.org/api/","co":"Aqicn","f":"Free w/ token","p":"n/a","b":"Global city/station AQI, geo and IP queries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Economics & Econometrics","count":28,"entries":[{"n":"Alpha Vantage Economic Indicators API","u":"https://www.alphavantage.co/documentation/","co":"Alphavantage","f":"Free w/ key, 25 req/day","p":"~$50/mo (premium)","b":"US GDP, CPI, unemployment, fed funds endpoints","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Australian Bureau of Statistics (ABS) Data API","u":"https://www.abs.gov.au/about/data-services/application-programming-interfaces-apis","co":"Australian Bureau of Statistics","f":"Free, keyless (SDMX)","p":"n/a","b":"Australian macro, prices, labour statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BIS Stats API (Bank for International Settlements)","u":"https://stats.bis.org/api-doc/v1/","co":"BIS","f":"Free, keyless","p":"n/a","b":"Global banking, credit, FX, property prices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DBnomics","u":"https://db.nomics.world/","co":"Nomics","f":"Free, keyless","p":"n/a","b":"Unified API aggregating 70+ econ data providers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ECB Data Portal (SDMX 2.1 web service)","u":"https://data.ecb.europa.eu/help/api/overview","co":"European Central Bank","f":"Free, keyless","p":"n/a","b":"Euro-area monetary, financial, FX statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EconDB API","u":"https://www.econdb.com/api/","co":"Econdb","f":"Free w/ token (basic public access)","p":"Paid plans for higher use","b":"Curated global macro time series, easy access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Eurostat API (Statistics / SDMX)","u":"https://ec.europa.eu/eurostat/web/user-guides/data-browser/api-data-access","co":"European Commission","f":"Free, keyless","p":"n/a","b":"EU member-state economic and social statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FAOSTAT API","u":"https://www.fao.org/faostat/","co":"FAO","f":"Free, keyless","p":"n/a","b":"Agriculture/food economics indicators by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FRED (Federal Reserve Bank of St. Louis)","u":"https://fred.stlouisfed.org/docs/api/fred/","co":"FRED (St. Louis Fed)","f":"Free w/ key, generous limits","p":"n/a","b":"US/global macro time series, gold standard","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"ILOSTAT SDMX API","u":"https://ilostat.ilo.org/resources/sdmx-tools/","co":"Ilo","f":"Free, keyless","p":"n/a","b":"Global labour market statistics, wages, employment","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IMF Data API (SDMX 2.1/3.0 + DataMapper)","u":"https://www.imf.org/external/datamapper/api/help","co":"IMF","f":"Free, keyless (rate-limited)","p":"n/a","b":"WEO, IFS, BOP, fiscal cross-country data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Nasdaq Data Link (formerly Quandl)","u":"https://docs.data.nasdaq.com/","co":"Nasdaq","f":"Free w/ key (free datasets, 50k/day)","p":"Per-dataset premium subscriptions","b":"Mixed econ/financial datasets, free samples","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OECD Data API (SDMX)","u":"https://data-explorer.oecd.org/","co":"OECD","f":"Free, keyless","p":"n/a","b":"OECD-country macro, social, productivity stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Penn World Table (Groningen GGDC)","u":"https://www.rug.nl/ggdc/productivity/pwt/","co":"Rug","f":"Free bulk download (no live API)","p":"n/a","b":"Cross-country real GDP/productivity research data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Statistics Canada Web Data Service (WDS)","u":"https://www.statcan.gc.ca/en/developers/wds","co":"Statistics Canada","f":"Free, keyless","p":"n/a","b":"Canadian macro/economic time series (ex-CANSIM)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Trading Economics API","u":"https://docs.tradingeconomics.com/","co":"Tradingeconomics","f":"Limited free dev key (sample data)","p":"Paid subscription tiers","b":"300k indicators, calendar, forecasts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"U.S. Bureau of Economic Analysis (BEA) API","u":"https://apps.bea.gov/API/docs/","co":"U.S. BEA","f":"Free w/ key","p":"n/a","b":"US GDP, NIPA, regional, trade accounts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"U.S. Bureau of Labor Statistics (BLS) Public Data API","u":"https://www.bls.gov/developers/","co":"U.S. BLS","f":"Free; v1 keyless, v2 free w/ key","p":"n/a","b":"CPI, employment, wages, productivity series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"U.S. Census Economic Indicators Time Series API","u":"https://www.census.gov/data/developers/data-sets.html","co":"U.S. Census Bureau","f":"Free w/ key","p":"n/a","b":"US business, manufacturing, retail econ indicators","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"U.S. Census International Trade API","u":"https://www.census.gov/data/developers/data-sets/international-trade.html","co":"U.S. Census Bureau","f":"Free w/ key","p":"n/a","b":"US monthly imports/exports by HS commodity","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"U.S. Treasury Fiscal Data API","u":"https://fiscaldata.treasury.gov/api-documentation/","co":"U.S. Treasury","f":"Free, keyless","p":"n/a","b":"US debt, revenue, spending, interest rates","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UK ONS Beta API","u":"https://developer.ons.gov.uk/","co":"UK Government","f":"Free, keyless","p":"n/a","b":"UK GDP, inflation, labour market time series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UN Comtrade API","u":"https://comtradedeveloper.un.org/","co":"United Nations","f":"Free w/ key (500 calls/day, 100k records/call)","p":"Premium subscription (bulk/priority)","b":"Official bilateral merchandise/services trade flows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UNCTADstat Data Centre / API","u":"https://unctadstat.unctad.org/EN/","co":"Unctad","f":"Free, keyless (bulk + API)","p":"n/a","b":"Trade, FDI, maritime, development statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UNSD SDG Indicators API","u":"https://unstats.un.org/sdgapi/swagger/","co":"United Nations","f":"Free, keyless","p":"n/a","b":"UN SDG and global development indicator series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Bank Indicators API (v2)","u":"https://datahelpdesk.worldbank.org/knowledgebase/articles/889392-about-the-indicators-api-documentation","co":"World Bank","f":"Free, keyless","p":"n/a","b":"16k development indicators across countries","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Bank WITS (World Integrated Trade Solution) API","u":"https://wits.worldbank.org/witsapiintro.aspx","co":"World Bank","f":"Free, keyless","p":"n/a","b":"Trade, tariff, NTM data by country/product","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WTO Timeseries API","u":"https://apiportal.wto.org/","co":"WTO","f":"Free w/ key","p":"n/a","b":"Merchandise and services trade statistics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Education & Pedagogy research","count":25,"entries":[{"n":"Achievement Standards Network (ASN)","u":"https://asn.desire2learn.com/","co":"Desire2learn","f":"Free (CC-licensed RDF/JSON-LD downloads)","p":"n/a","b":"Curriculum standards as RDF linked-data, incl. Common Core","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"2.4M+ STEM preprints metadata and PDF links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"College Scorecard API (US Dept of Education)","u":"https://collegescorecard.ed.gov/data/api-documentation/","co":"U.S. Dept of Education","f":"Free w/ key (api.data.gov), rate-limited","p":"n/a","b":"US college costs, outcomes, earnings, admissions, programs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Common Standards Project API","u":"https://commonstandardsproject.com/developers","co":"Commonstandardsproject","f":"Free w/ key","p":"n/a","b":"Machine-readable academic standards, all 50 US states","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CORE API (open access aggregator)","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key (registration)","p":"Commercial license on request","b":"300M+ open-access papers w/ full-text from repositories","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (polite pool w/ email)","p":"Metadata Plus (annual subscription for SLA)","b":"150M+ DOI scholarly metadata, citations, funding, licenses","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.ed.gov Open Data Platform (US Dept of Education)","u":"https://data.ed.gov/","co":"U.S. Dept of Education","f":"Free, keyless (CKAN REST API, CSV)","p":"n/a","b":"Federal ED datasets, grants, EDFacts, civil rights","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOAJ API (Directory of Open Access Journals)","u":"https://doaj.org/api/v4/docs","co":"DOAJ","f":"Free, keyless for search (key for uploads)","p":"n/a","b":"Open-access journal and article metadata directory","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ERIC (Education Resources Information Center) API","u":"https://eric.ed.gov/?api","co":"U.S. Dept of Education","f":"Free, keyless","p":"n/a","b":"Searching 1.4M+ education research citations, abstracts, full-text PDFs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Learning Registry","u":"https://www.learningregistry.org/","co":"Learningregistry","f":"Free, open APIs (publish/consume)","p":"n/a","b":"Federated metadata/paradata exchange for learning resources","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Learning Tools Interoperability (LTI 1.3) / 1EdTech","u":"https://www.imsglobal.org/spec/lti/v1p3","co":"Imsglobal","f":"Free open spec (OAuth2/OIDC)","p":"1EdTech membership for certification","b":"Standard LMS-to-tool launch, grades, roster sync","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MIT OpenCourseWare (OCW)","u":"https://ocw.mit.edu/","co":"Mit","f":"Free (CC-BY-NC-SA; site search, bulk downloads)","p":"n/a","b":"2,500+ MIT course materials, lectures, syllabi","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Moodle Web Services API","u":"https://docs.moodle.org/dev/Web_service_API_functions","co":"Moodle","f":"Free, self-hosted (token per install)","p":"n/a (open-source LMS)","b":"LMS user/course/enrolment/grade integration (REST)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NCES EDGE Open Data API (ArcGIS)","u":"https://data-nces.opendata.arcgis.com/pages/use-apis","co":"Arcgis","f":"Free, keyless","p":"n/a","b":"School/district geographic, demographic, boundary GIS data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NSF NCSES API (science & engineering education stats)","u":"https://ncses.nsf.gov/resource","co":"NSF","f":"Free, keyless","p":"n/a","b":"US STEM degrees, R&D, doctorate recipients, workforce stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OECD Data API (SDMX, incl. PISA/Education GPS)","u":"https://data.oecd.org/api/","co":"OECD","f":"Free, keyless","p":"n/a","b":"Cross-country education stats, PISA, spending, attainment","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open edX REST APIs","u":"https://docs.openedx.org/en/latest/developers/concepts/platform_overview.html","co":"Openedx","f":"Free, self-hosted (OAuth2 token)","p":"n/a (open-source platform)","b":"Course content, enrollment, grades on Open edX LMS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless (polite pool w/ email)","p":"Premium plan (custom pricing)","b":"250M+ scholarly works, authors, institutions, concepts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free, keyless; free key for higher limits","p":"n/a","b":"200M+ papers, AI TLDR summaries, citation graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UNESCO Institute for Statistics (UIS) API","u":"https://api.uis.unesco.org/api/public/documentation/","co":"Unesco","f":"Free, keyless","p":"n/a","b":"Global education, literacy, science, culture indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Urban Institute Education Data Portal API","u":"https://educationdata.urban.org/documentation/index.html","co":"Urban","f":"Free, keyless","p":"n/a","b":"Unified NCES CCD/IPEDS/CRDC/Scorecard school-district data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wikidata Query Service (SPARQL)","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Linked-data on schools, scholars, OER, academic entities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikipedia / MediaWiki REST API","u":"https://www.mediawiki.org/wiki/API:REST_API","co":"Wikimedia","f":"Free, keyless","p":"Wikimedia Enterprise (paid SLA)","b":"Encyclopedic educational content, 300+ languages","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"xAPI (Experience API) / Learning Record Store spec","u":"https://github.com/adlnet/xAPI-Spec","co":"Adlnet","f":"Free open spec; free-tier LRS hosts available","p":"Hosted LRS plans vary by vendor","b":"Learning-analytics event tracking across tools (verb-noun)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Khan Academy API (deprecated)","u":"https://github.com/Khan/khan-api","co":"Khan","f":"none (public API removed July 2020)","p":"n/a","b":"Historical reference only; no live public endpoints","s":"Available","fr":0,"kl":0,"kr":0,"cf":"m"}]},{"category":"Election, legislative & campaign-finance data","count":22,"entries":[{"n":"Cicero Data API (Azavea)","u":"https://www.cicerodata.com/api/","co":"Cicerodata","f":"Free trial credits; otherwise paid","p":"Paid credit packs / subscription (contact sales)","b":"Elected officials and legislative districts by address","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Clerk of the House roll call votes (EVS)","u":"https://clerk.house.gov/Votes","co":"House","f":"Free, keyless XML feeds (clerk.house.gov/evs/YEAR/rollNNN.xml)","p":"n/a","b":"Official House roll call vote results","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Congress.gov API (Library of Congress)","u":"https://api.congress.gov/","co":"Library of Congress","f":"Free w/ key (api.data.gov)","p":"n/a","b":"Official bills, members, votes, committees, nominations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FEC bulk data downloads","u":"https://www.fec.gov/data/browse-data/?tab=bulk-data","co":"Fec","f":"Free, keyless bulk files (daily/weekly)","p":"n/a","b":"Full campaign finance bulk datasets, itemized records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Federal Register API","u":"https://www.federalregister.gov/developers/documentation/api/v1","co":"Federal Register","f":"Free, keyless","p":"n/a","b":"Rules, exec orders, regulatory notices","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FollowTheMoney.org API (Institute / OpenSecrets)","u":"https://www.followthemoney.org/our-data/apis","co":"Followthemoney","f":"Free w/ free myFollowTheMoney account","p":"n/a","b":"State-level campaign contributions and lobbying","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Civic Information API","u":"https://developers.google.com/civic-information","co":"Google","f":"Free w/ key (quota)","p":"n/a","b":"Elections, polling places, OCD divisions by address","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GovInfo API (GPO)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Free w/ key (api.data.gov)","p":"n/a","b":"Federal documents, bill text, Congressional Record","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"LegiScan API","u":"https://legiscan.com/legiscan","co":"Legiscan","f":"Free w/ key (public tier 30k queries/mo)","p":"n/a","b":"Real-time state + federal bill tracking, all 50 states","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MIT Election Data + Science Lab (MEDSL)","u":"https://electionlab.mit.edu/data","co":"Mit","f":"Free, keyless (Harvard Dataverse)","p":"n/a","b":"Historical US election returns datasets, research-grade","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open States API v3 (Plural)","u":"https://docs.openstates.org/api-v3/","co":"Openstates","f":"Free w/ key (default tier ~500 queries/day)","p":"n/a","b":"State legislatures: bills, legislators, votes, 50 states + DC/PR","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenElections","u":"https://openelections.net/","co":"Openelections","f":"Free, keyless (bulk CSV via GitHub)","p":"n/a","b":"Certified precinct/county election results by state","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenFEC (Federal Election Commission API)","u":"https://api.open.fec.gov/developers/","co":"Fec","f":"Free w/ key (api.data.gov, ~1k/hr default)","p":"n/a","b":"Federal campaign finance, candidates, committees, filings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Senate LDA Lobbying Disclosure API","u":"https://lda.senate.gov/api/","co":"Senate","f":"Free w/ key registration","p":"n/a","b":"Federal lobbying registrations and quarterly filings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Senate.gov roll call votes (LIS XML)","u":"https://www.senate.gov/legislative/LIS/roll_call_lists/vote_menu_119_1.htm","co":"Senate","f":"Free, keyless XML/HTML feeds (vote_menu and per-vote XML)","p":"n/a","b":"Official Senate roll call vote results","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"unitedstates/congress (scrapers + data)","u":"https://github.com/unitedstates/congress","co":"Unitedstates","f":"Free, keyless (open-source scrapers + bulk data)","p":"n/a","b":"Bulk bills, votes, amendments scraped from official sources","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"unitedstates/congress-legislators","u":"https://github.com/unitedstates/congress-legislators","co":"Unitedstates","f":"Free, keyless (GitHub bulk YAML/JSON/CSV)","p":"n/a","b":"Canonical legislator IDs, bios, social, terms, committees","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USAspending API","u":"https://api.usaspending.gov/","co":"USAspending","f":"Free, keyless","p":"n/a","b":"Federal spending, awards, contracts (context for finance)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Vote Smart API (Project Vote Smart)","u":"https://api.votesmart.org/docs/","co":"Votesmart","f":"Free w/ key (legacy, limited)","p":"n/a","b":"Candidate bios, ratings, issue positions, votes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ballotpedia API","u":"https://developer.ballotpedia.org/","co":"Ballotpedia","f":"none (paid; bulk CSV from ~$600, API subscription thousands/mo)","p":"Bulk CSV from ~$600 one-time; API subscription contact sales","b":"Candidates, ballot measures, officeholder coverage","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"BallotReady Officeholders API","u":"https://organizations.ballotready.org/officeholders-api","co":"Ballotready","f":"none (partner/commercial)","p":"Contact sales","b":"Officeholders and candidates down to local level","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Plural Policy API (formerly Civic Eagle)","u":"https://pluralpolicy.com/","co":"Pluralpolicy","f":"none (commercial)","p":"Contact sales","b":"Enterprise legislative tracking and analytics, 50 states + federal","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Engineering (mechanical/civil/electrical)","count":25,"entries":[{"n":"AFLOW REST API (aflowlib)","u":"https://aflow.org/documentation/","co":"Aflow","f":"Free, keyless","p":"n/a","b":"3.5M+ computed inorganic crystals, thermo/elastic/electronic data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless (Atom feed)","p":"n/a","b":"Engineering preprints (EESS, physics) metadata + PDF links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CADENAS PARTcommunity / 3Dfindit","u":"https://www.cadenas.de/en","co":"Cadenas","f":"Free CAD downloads (web/portal); embeddable","p":"Quote-based for API/eCATALOG integration","b":"Manufacturer 3D/2D CAD & BIM catalogs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CoolProp","u":"https://coolprop.org/","co":"Coolprop","f":"Free, open-source (MIT) library; Python/C++/Excel/MATLAB wrappers","p":"n/a","b":"Thermophysical/fluid properties for HVAC, refrigeration, process eng","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Crossref REST API","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless (Polite Pool w/ email recommended)","p":"Metadata Plus subscription (quote)","b":"Engineering journal/conference DOI metadata, citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Crystallography Open Database (COD) REST API","u":"https://wiki.crystallography.net/RESTful_API/","co":"Crystallography","f":"Free, keyless (query + CIF/HKL/JSON retrieval)","p":"n/a","b":"Open crystal structures (CIF) for materials/chemistry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Digi-Key API","u":"https://developer.digikey.com/","co":"Digikey","f":"Free w/ key (product search, pricing, inventory, ordering)","p":"n/a (free APIs; account required)","b":"Component pricing/inventory/datasheets, ordering automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FHWA LTBP InfoBridge / National Bridge Inventory","u":"https://infobridge.fhwa.dot.gov/data","co":"U.S. DOT","f":"Free, keyless (web portal + downloadable NBI ASCII data); no formal REST API","p":"n/a","b":"600K+ US bridges: condition, traffic, structure type","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"IEEE Xplore Metadata API","u":"https://developer.ieee.org/","co":"IEEE","f":"Free w/ key after app registration/approval","p":"n/a (institutional access for full text)","b":"Metadata/abstracts for IEEE papers, standards, conferences","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Materials Project API (MAPI)","u":"https://api.materialsproject.org/docs","co":"Materialsproject","f":"Free w/ key (auto-generated on registration)","p":"n/a","b":"Computed material properties, structures, batteries, phase diagrams","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Matmatch","u":"https://matmatch.com/","co":"Matmatch","f":"Free web platform; no documented public API","p":"Supplier/enterprise plans (quote)","b":"Material selection/comparison by property and supplier","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MatWeb","u":"https://www.matweb.com/","co":"Matweb","f":"Free web search (105K+ datasheets); no public REST API","p":"MatWeb Premium / data licensing (quote)","b":"Engineering material datasheets by property/composition/UNS","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Mouser Search API","u":"https://www.mouser.com/api-home/","co":"Mouser","f":"Free w/ key (registered account)","p":"n/a","b":"Electronic component search, pricing, availability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nexar API (Octopart)","u":"https://nexar.com/api","co":"Nexar","f":"Free dev account w/ limited query allowance (GraphQL)","p":"Paid plans for higher volume","b":"Electronic part search, pricing, stock, CAD models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NIST Chemistry WebBook (SRD 69)","u":"https://webbook.nist.gov/chemistry/","co":"NIST","f":"Free, keyless (web/query access; no official structured JSON API)","p":"n/a","b":"Thermochemistry, phase/spectral data for compounds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST-JARVIS","u":"https://jarvis.nist.gov/","co":"NIST","f":"Free, keyless (JARVIS-Tools / REST + bulk data)","p":"n/a","b":"DFT/ML/force-field materials data, 1M+ properties","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NREL Developer Network (PVWatts, Utility Rates, OpenEI)","u":"https://developer.nrel.gov/docs/","co":"NREL","f":"Free w/ key (DEMO_KEY for testing)","p":"n/a","b":"Electrical/energy: PV modeling, utility rate structures","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OPTIMADE (Materials Consortia)","u":"https://www.optimade.org/providers-dashboard/","co":"Optimade","f":"Free, keyless (federated standard across many DBs)","p":"n/a","b":"Unified REST query across many materials databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OQMD (Open Quantum Materials Database) API","u":"https://oqmd.org/api/","co":"Oqmd","f":"Free, keyless (REST + OPTIMADE endpoints)","p":"n/a","b":"DFT-calculated thermodynamic and structural material properties","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PubChem PUG REST","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (5 req/s, 400/min limits)","p":"n/a","b":"Chemical compound properties, identifiers, structures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/","co":"Semantic Scholar","f":"Free, keyless (key available for higher limits)","p":"n/a","b":"Engineering paper metadata, citations, author graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SnapMagic Search (formerly SnapEDA) API","u":"https://www.snapeda.com/get-api/","co":"Snapeda","f":"Free tier available (symbols, footprints, 3D models)","p":"Premium API (contact/quote)","b":"PCB symbols, footprints, 3D CAD models for ECAD","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TraceParts API / Web Services","u":"https://developers.traceparts.com/","co":"Traceparts","f":"Free developer docs; integration via partner program (token-based)","p":"Partner/quote-based for API integration","b":"Supplier-certified 2D/3D mechanical CAD models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USGS Seismic Design Web Services","u":"https://www.usgs.gov/tools/seismic-design-data-web-services","co":"USGS","f":"Free, keyless","p":"n/a","b":"ASCE 7 / AASHTO design ground motions by lat/lon","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"McMaster-Carr Product Information API","u":"https://www.mcmaster.com/help/api/","co":"Mcmaster","f":"none (approved customers only; REST API base https://api.mcmaster.com/v1, client-cert auth)","p":"Account/approval required (no public price)","b":"MRO/hardware part data and CAD file retrieval","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Environmental science & Ecology","count":27,"entries":[{"n":"Catalogue of Life / ChecklistBank API","u":"https://api.checklistbank.org/","co":"Checklistbank","f":"Free, keyless reads (GBIF login to edit)","p":"n/a","b":"2.1M+ accepted species taxonomic checklist","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Copernicus Climate Data Store (CDS) API","u":"https://cds.climate.copernicus.eu/how-to-api","co":"Copernicus","f":"Free w/ account/token","p":"n/a","b":"ERA5 reanalysis, climate projections, ECVs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Encyclopedia of Life (EOL) TraitBank API","u":"https://eol.org/docs/what-is-eol/data-services","co":"Eol","f":"Free; structured-data/Cypher API may need auth on request","p":"n/a","b":"Species traits, measurements, interactions (11M+ records)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Environmental Data Initiative (EDI) / LTER PASTA","u":"https://pastaplus-core.readthedocs.io/","co":"Readthedocs","f":"Free, keyless reads","p":"n/a","b":"Long-term ecological research (LTER) data packages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EPA Air Quality System (AQS) API","u":"https://aqs.epa.gov/aqsweb/documents/data_api.html","co":"U.S. EPA","f":"Free w/ registered email+key","p":"n/a","b":"Historical regulatory US ambient air monitoring data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"EPA AirNow API","u":"https://docs.airnowapi.org/","co":"Airnowapi","f":"Free w/ key","p":"n/a","b":"Real-time + forecast AQI for US/Canada/Mexico","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPA ECHO (Enforcement and Compliance History Online) API","u":"https://echo.epa.gov/tools/web-services","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"US facility air/water/waste compliance & enforcement data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Envirofacts Data Service API","u":"https://www.epa.gov/enviro/envirofacts-data-service-api","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"US TRI, drinking water (SDWIS), RadNet, RCRA data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FishBase / SeaLifeBase API","u":"https://ropensci.github.io/fishbaseapidocs/","co":"Ropensci","f":"Free, keyless (S3/REST via rOpenSci)","p":"n/a","b":"Fish + aquatic species biology, ecology, traits","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GBIF (Global Biodiversity Information Facility)","u":"https://techdocs.gbif.org/en/openapi/","co":"GBIF","f":"Free, keyless (login for downloads)","p":"n/a","b":"3B+ global species occurrence records, taxonomy","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Global Forest Watch (GFW) Data API","u":"https://data-api.globalforestwatch.org/","co":"Globalforestwatch","f":"Free w/ key (key expires after 1 year)","p":"n/a","b":"Tree cover loss, deforestation alerts (GLAD/RADD)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ISRIC SoilGrids REST API","u":"https://rest.isric.org/","co":"Isric","f":"Free, keyless (fair use 5 req/min)","p":"n/a","b":"Global gridded soil properties by point query","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IUCN Red List API (v4)","u":"https://api.iucnredlist.org/","co":"IUCN","f":"Free w/ token (non-commercial only)","p":"n/a (IBAT subscription for commercial)","b":"Species conservation status, threats, habitats","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NASA POWER","u":"https://power.larc.nasa.gov/api/pages/","co":"NASA","f":"Free, keyless","p":"n/a","b":"Global agroclimatology, solar + meteorology time series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NEON (National Ecological Observatory Network)","u":"https://data.neonscience.org/data-api","co":"Neonscience","f":"Free, keyless (token optional for rate limits)","p":"n/a","b":"180+ open continental US ecological data products","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NOAA ERDDAP","u":"https://www.ncei.noaa.gov/erddap/","co":"NOAA","f":"Free, keyless","p":"n/a","b":"Oceanographic/environmental gridded + sensor datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OBIS (Ocean Biodiversity Information System)","u":"https://api.obis.org/","co":"BIS","f":"Free, keyless","p":"n/a","b":"100M+ marine species occurrence records globally","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open-Meteo Air Quality API","u":"https://open-meteo.com/en/docs/air-quality-api","co":"Open meteo","f":"Free, keyless, 10k calls/day non-commercial","p":"~EUR 29/mo commercial","b":"Keyless air quality + pollen forecasts by lat/lon","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAQ","u":"https://docs.openaq.org/","co":"Openaq","f":"Free w/ key, full global archive","p":"n/a","b":"Global ground-level air quality (PM2.5, NO2, O3)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Protected Planet / WDPA API","u":"https://api.protectedplanet.net/","co":"Protectedplanet","f":"Free w/ token (request form)","p":"n/a","b":"Global protected areas + OECM boundaries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PurpleAir API","u":"https://api.purpleair.com/","co":"Purpleair","f":"Free w/ key (request via develop.purpleair.com)","p":"n/a (commercial use requires permission)","b":"Community low-cost PM2.5 sensor network, real-time","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USA National Phenology Network (USA-NPN)","u":"https://www.usanpn.org/data/code","co":"Usanpn","f":"Free, keyless (honor-system self-ID via request_source)","p":"n/a","b":"Species life-cycle timing, gridded phenology models","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USDA NRCS Soil Data Access (SDA)","u":"https://sdmdataaccess.nrcs.usda.gov/","co":"U.S. USDA","f":"Free, keyless (SQL/WMS/WFS)","p":"n/a","b":"US SSURGO soil survey tabular + spatial data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Water Data APIs (waterdata/waterservices)","u":"https://api.waterdata.usgs.gov/","co":"USGS","f":"Free, keyless (key optional, higher limits)","p":"n/a","b":"US streamflow, gage height, real-time water sensors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Water Quality Portal (WQP)","u":"https://www.waterqualitydata.us/webservices_documentation/","co":"Waterqualitydata","f":"Free, keyless","p":"n/a","b":"Discrete water-quality data from USGS, EPA, 400+ agencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"World Air Quality Index (WAQI / AQICN)","u":"https://aqicn.org/api/","co":"Aqicn","f":"Free w/ token (non-commercial)","p":"n/a (non-commercial only)","b":"Real-time AQI from 11000+ global stations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"World Register of Marine Species (WoRMS) REST API","u":"https://www.marinespecies.org/rest/","co":"Marinespecies","f":"Free, keyless","p":"n/a","b":"Authoritative marine taxonomy, 460k+ names","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Fashion, Apparel & Textiles","count":28,"entries":[{"n":"api4ai Fashion API","u":"https://api4.ai/apis/fashion","co":"Api4","f":"Free plan via RapidAPI; trial credits direct","p":"Pay-as-you-go / subscription","b":"Garment object detection & classification with bounding boxes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Clothing Fit Dataset for Size Recommendation (Kaggle)","u":"https://www.kaggle.com/datasets/rmisra/clothing-fit-dataset-for-size-recommendation","co":"Kaggle","f":"Free (Kaggle account)","p":"n/a","b":"ModCloth/RentTheRunway fit feedback for size-rec models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"DeepFashion Dataset","u":"http://mmlab.ie.cuhk.edu.hk/projects/DeepFashion.html","co":"Edu","f":"Free for research (registration)","p":"n/a","b":"800k+ labeled fashion images, landmarks, attributes for ML","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DummyJSON Products","u":"https://dummyjson.com/docs/products","co":"Dummyjson","f":"Free, keyless","p":"n/a","b":"Fake apparel product JSON with categories, images, prices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Easysize Size Recommendation","u":"https://developers.easysize.me/","co":"Easysize","f":"Free trial / plugin (dev docs public)","p":"Subscription (contact)","b":"AI size recommendation without measurements for e-commerce","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Fake Store API","u":"https://fakestoreapi.com/","co":"Fakestoreapi","f":"Free, keyless","p":"n/a","b":"Dummy e-commerce clothing products/categories for prototyping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Fashionpedia Dataset","u":"https://fashionpedia.github.io/home/","co":"Fashionpedia","f":"Free open dataset","p":"n/a","b":"Fashion image segmentation + fine-grained attribute ontology","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FASHN API (Virtual Try-On)","u":"https://fashn.ai/products/api","co":"Fashn","f":"Trial credits on signup","p":"$0.075 per generation; 100-credit min (~$7.50)","b":"AI virtual try-on, product-to-model image generation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FRED Textile & Apparel Price Indexes","u":"https://fred.stlouisfed.org/series/WPU03","co":"FRED (St. Louis Fed)","f":"Free w/ API key","p":"n/a","b":"Textile/apparel PPI and global cotton price series","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Good On You Brand Ratings API","u":"https://partnerships.goodonyou.eco/","co":"Goodonyou","f":"Free public brand directory (web); API is partner/paid","p":"Enterprise/partner Ratings API (contact for quote)","b":"Brand sustainability/ethical ratings for fashion & beauty","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hugging Face Fashion Datasets Hub","u":"https://huggingface.co/datasets?search=fashion","co":"Hugging Face","f":"Free, mostly keyless via datasets library","p":"n/a","b":"Many open fashion/apparel image & text datasets for ML","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Kaggle Fashion Product Images Dataset","u":"https://www.kaggle.com/datasets/paramaggarwal/fashion-product-images-dataset","co":"Kaggle","f":"Free (Kaggle account + API key)","p":"n/a","b":"44k labeled apparel product images for ML training","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Lykdat Fashion API (Deep Tagging / Image Search)","u":"https://apidocs.lykdat.com/","co":"Lykdat","f":"Free apparel auto-tagging / deep tagging API (with key)","p":"Paid plans for higher-volume image search (contact)","b":"Apparel auto-tagging, fashion image search, deep tagging","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ombre AI Fashion Size Recommendation (RapidAPI)","u":"https://rapidapi.com/OmbreRapid/api/ombre-ai-fashion-size-recommendation","co":"Rapidapi","f":"Free tier via RapidAPI","p":"Paid RapidAPI plans","b":"AI apparel size recommendation endpoint for developers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Supply Hub (formerly Open Apparel Registry)","u":"https://opensupplyhub.org/api/docs/","co":"Opensupplyhub","f":"Free open data; public facility map + 14-day API trial","p":"Paid API tiers (contact sales) for production pulls","b":"Global apparel factory/facility supply-chain data + OS IDs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Platzi Fake Store API","u":"https://fakeapi.platzi.com/","co":"Platzi","f":"Free, keyless (REST + GraphQL)","p":"n/a","b":"Fake clothing catalog with filtering, create/update endpoints","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Retailed.io Resale Marketplace APIs (StockX, GOAT, etc.)","u":"https://www.retailed.io/datasources/api","co":"Retailed","f":"Free: $0/mo with 50 API credits","p":"Paid subscription tiers (from ~$99/mo)","b":"Sneaker/streetwear/luxury resale pricing & listing data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Shopify Storefront API","u":"https://shopify.dev/docs/api/storefront/latest","co":"Shopify","f":"Free with public access token (per store)","p":"Shopify plan required to host a store","b":"Programmatic apparel catalog/products from any Shopify store","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"The Color API","u":"https://www.thecolorapi.com/","co":"Thecolorapi","f":"Free, keyless","p":"n/a","b":"Color naming, conversion, schemes for fashion palettes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USDA ERS Cotton, Wool & Textile Data","u":"https://www.ers.usda.gov/data-products/cotton-wool-and-textile-data","co":"U.S. USDA","f":"Free downloadable data (CSV/Excel), keyless","p":"n/a","b":"US cotton/wool supply, demand, prices, textile trade","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FAS Cotton & Textile Trade Data (PSD / GATS)","u":"https://apps.fas.usda.gov/psdonline/app/index.html","co":"U.S. USDA","f":"Free, keyless downloads + open API","p":"n/a","b":"Global cotton production, trade, stocks by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ximilar Fashion Tagging & Search","u":"https://docs.ximilar.com/services/fashion_tagging/","co":"Ximilar","f":"Free public demo + monthly free API credits","p":"Pay-as-you-go credit plans","b":"AI fashion tagging, category/color/pattern detection, visual search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Bold Metrics Virtual Sizer API","u":"https://boldmetrics.com/solutions/virtual-sizer","co":"Boldmetrics","f":"none (demo on request)","p":"Enterprise pricing (contact sales)","b":"Body-data-driven apparel size & fit recommendations","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Fit Analytics / Fit Finder","u":"https://fitanalytics.com/fit-finder","co":"Fitanalytics","f":"none (demo on request)","p":"Enterprise pricing (contact sales)","b":"ML size/fit recommendation for apparel & footwear","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Heuritech Fashion Trend Forecasting","u":"https://heuritech.com/fashion-trend-forecasting-analytics/","co":"Heuritech","f":"none (enterprise)","p":"Custom enterprise quote","b":"AI trend prediction from social-media image analysis","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Higg / Worldly (Higg Index)","u":"https://worldly.io/","co":"Worldly","f":"none (membership)","p":"Membership/subscription (contact)","b":"Apparel/textile supply-chain sustainability scoring (Higg Index)","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Pantone Connect / Pantone API","u":"https://www.pantone.com/products/digital-apps/pantone-api","co":"Pantone","f":"none (licensed)","p":"Licensed API (contact Pantone)","b":"Pantone PMS & Fashion-Home-Interiors color integration","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"WGSN Trend Forecasting & Data","u":"https://www.wgsn.com/en/what-we-do/ai-data","co":"Wgsn","f":"none (subscription)","p":"Enterprise subscription (contact)","b":"Industry-standard fashion/color/consumer trend forecasting","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Forestry, Timber & Land","count":25,"entries":[{"n":"BLM National PLSS CadNSDI REST Service","u":"https://gis.blm.gov/arcgis/rest/services/Cadastral/BLM_Natl_PLSS_CadNSDI/MapServer","co":"Blm","f":"Free, keyless (ArcGIS REST)","p":"n/a","b":"US township/range/section cadastral survey grid","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Commodities-API (Lumber Futures)","u":"https://commodities-api.com/","co":"Commodities api","f":"Free trial w/ key (limited monthly requests)","p":"~$50/mo","b":"Real-time/historic random-length lumber futures prices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Copernicus Land Monitoring Service (CORINE / CLMS API)","u":"https://land.copernicus.eu/api/en/products/corine-land-cover","co":"Copernicus","f":"Free with registration; CLMS download API","p":"n/a","b":"Pan-European land cover/use, 44 thematic classes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ESA WorldCover","u":"https://esa-worldcover.org/en/data-access","co":"Esa worldcover","f":"Free; Terrascope WMS + AWS Open Data Registry","p":"n/a","b":"Global 10m land cover (incl. forest classes)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FAO Hand-in-Hand Geospatial Platform API","u":"https://data.apps.fao.org/","co":"FAO","f":"Free, keyless (WMS/WFS/REST geospatial layers)","p":"n/a","b":"Global land cover, forest, agro-environmental geodata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FAOSTAT Forestry API (FAO)","u":"https://www.fao.org/faostat/","co":"FAO","f":"Free, keyless (bulk + REST/SDMX)","p":"n/a","b":"Global roundwood, sawnwood, pulp/paper production & trade","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FISE - Forest Information System for Europe (EEA)","u":"https://forest.eea.europa.eu/","co":"European Union","f":"Free, keyless (EEA SDI catalogue/services)","p":"n/a","b":"European forest condition, biodiversity, disturbance data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FRED - Lumber & Wood Products PPI (St. Louis Fed)","u":"https://fred.stlouisfed.org/series/WPU081","co":"FRED (St. Louis Fed)","f":"Free with API key","p":"n/a","b":"US lumber, wood pulp producer price indices","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Global Forest Watch Data API (WRI)","u":"https://data-api.globalforestwatch.org/","co":"Globalforestwatch","f":"Free, open access; API key via signup for higher use","p":"n/a","b":"Tree cover loss/gain, deforestation alerts, forest data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hansen Global Forest Change (UMD via Google Earth Engine)","u":"https://developers.google.com/earth-engine/datasets/catalog/UMD_hansen_global_forest_change_2025_v1_13","co":"Google","f":"Free dataset; free GEE account or direct GeoTIFF download","p":"n/a","b":"Annual 30m global tree-cover loss/gain since 2000","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"ISRIC SoilGrids REST API","u":"https://rest.isric.org/","co":"Isric","f":"Free, keyless (5 calls/min fair use, CC-BY 4.0)","p":"n/a","b":"Global 250m gridded soil properties for land","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Microsoft Planetary Computer STAC API","u":"https://planetarycomputer.microsoft.com/docs/reference/stac/","co":"Microsoft","f":"Free, keyless STAC search; key for compute hub","p":"n/a","b":"Open geospatial/land-cover/forest raster catalog via STAC","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA FIRMS Active Fire API","u":"https://firms.modaps.eosdis.nasa.gov/api/","co":"NASA","f":"Free with MAP_KEY (5000 tx / 10 min)","p":"n/a","b":"Near-real-time MODIS/VIIRS wildfire detections","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"OpenEPI Integrated Deforestation Alerts API","u":"https://developer.openepi.io/data-catalog/resource/23c4c70e-08b7-41bd-ab83-38a3551d4729","co":"Openepi","f":"Free, open (CC-BY 4.0), keyless","p":"n/a","b":"GLAD-L/GLAD-S2/RADD combined near-real-time deforestation alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenLandMap REST API (OpenGeoHub)","u":"https://api.openlandmap.org/","co":"Openlandmap","f":"Free, keyless (open data ODbL/CC-BY-SA)","p":"n/a","b":"Global land cover, vegetation, soil, terrain layers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenStreetMap Overpass API (landuse=forest)","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless (public instances)","p":"n/a","b":"Forest/landuse polygon geometries worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Protected Planet API (WDPA, UNEP-WCMC)","u":"https://api.protectedplanet.net/documentation","co":"Protectedplanet","f":"Free with token (request form)","p":"n/a","b":"Global protected areas and OECMs database","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sentinel Hub / Copernicus Data Space Ecosystem","u":"https://documentation.dataspace.copernicus.eu/APIs.html","co":"Copernicus","f":"Free with registration; OData/STAC + processing quota","p":"n/a","b":"Sentinel imagery for forest cover/change monitoring","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USDA Forest Service FIADB-API / EVALIDator","u":"https://apps.fs.usda.gov/fiadb-api/","co":"U.S. USDA","f":"Free, keyless (CSV/JSON/XML output)","p":"n/a","b":"US forest inventory: volume, biomass, species, plots","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA NRCS Soil Data Access (SSURGO)","u":"https://sdmdataaccess.nrcs.usda.gov/","co":"U.S. USDA","f":"Free, keyless (SQL web services)","p":"n/a","b":"US soil survey spatial/tabular data for land use","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USFS FSGeodata / EDW ArcGIS REST Services","u":"https://data.fs.usda.gov/geodata/edw/","co":"U.S. USDA","f":"Free, keyless (ESRI REST MapServer/FeatureServer)","p":"n/a","b":"National forest boundaries, wilderness, grasslands geospatial","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Annual NLCD / MRLC Land Cover Services","u":"https://www.mrlc.gov/data-services-page","co":"Mrlc","f":"Free, keyless (WMS/WCS + AWS S3 open data)","p":"n/a","b":"US annual land cover/use raster classifications","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS PAD-US TNM Access API (The National Map)","u":"https://tnmaccess.nationalmap.gov/api/v1/docs","co":"Nationalmap","f":"Free, keyless","p":"n/a","b":"US boundaries, hydrography, elevation, structures data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS PAD-US Web Services (GAP Analysis Project)","u":"https://www.usgs.gov/programs/gap-analysis-project/science/pad-us-web-services","co":"USGS","f":"Free, keyless (ArcGIS REST services)","p":"n/a","b":"US public lands, protected areas, GAP status codes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Regrid Parcel API (Landgrid)","u":"https://regrid.com/api","co":"Regrid","f":"none (commercial; limited trial)","p":"Paid (custom/enterprise pricing)","b":"Nationwide US/Canada cadastral parcel boundaries & owners","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Gaming & Esports","count":27,"entries":[{"n":"Battle.net (Blizzard) Game Data API","u":"https://develop.battle.net/","co":"Battle","f":"Free w/ OAuth client (rate-limited)","p":"n/a","b":"WoW, Diablo, Hearthstone, StarCraft II game/profile data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CheapShark","u":"https://apidocs.cheapshark.com/","co":"Cheapshark","f":"Free, keyless","p":"n/a","b":"PC game deals and price comparison across 30+ stores","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FACEIT Data API","u":"https://docs.faceit.com/docs/data-api/","co":"Faceit","f":"Free w/ API key (App Studio)","p":"n/a","b":"CS2/CSGO players, matches, competitions, stats","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FreeToGame","u":"https://www.freetogame.com/api-doc","co":"Freetogame","f":"Free, keyless","p":"n/a","b":"Free-to-play game catalog with genres and metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GamerPower API","u":"https://www.gamerpower.com/api-read","co":"Gamerpower","f":"Free, keyless (attribution required, 4 req/s)","p":"n/a","b":"Tracks free game giveaways, beta keys, loot drops","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Giant Bomb API","u":"https://www.giantbomb.com/api/documentation/","co":"Giantbomb","f":"Free w/ account key","p":"n/a","b":"Games, characters, reviews, video game wiki data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Halo (343/Microsoft) Public API","u":"https://developer.haloapi.com/","co":"Haloapi","f":"Free beta w/ key subscription (Azure portal)","p":"n/a","b":"Halo 5/Halo Wars 2 stats, profile, UGC; beta","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"HenrikDev Unofficial Valorant API","u":"https://docs.henrikdev.xyz/","co":"Henrikdev","f":"Free Basic key (Discord signup)","p":"n/a (Enhanced key by application)","b":"Valorant MMR, matchlist, leaderboards, esports","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hypixel API","u":"https://api.hypixel.net/","co":"Hypixel","f":"Free w/ key; some endpoints keyless","p":"n/a","b":"Minecraft Hypixel player stats, SkyBlock, auctions","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"IGDB (Internet Game Database)","u":"https://api-docs.igdb.com/","co":"Igdb","f":"Free w/ Twitch dev key, non-commercial use","p":"Commercial partnership (custom)","b":"Comprehensive game metadata, covers, genres, release dates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Liquipedia (MediaWiki + LPDB API)","u":"https://liquipedia.net/api","co":"Liquipedia","f":"Free MediaWiki API (1 req/2s); LPDB free for education","p":"Commercial LPDB (custom)","b":"Deep esports tournaments, rosters, historical archive","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Mojang API (Minecraft)","u":"https://minecraft.wiki/w/Mojang_API","co":"Minecraft","f":"Free, keyless (rate-limited)","p":"n/a","b":"Minecraft username-to-UUID, profile/skin lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenDota","u":"https://docs.opendota.com/","co":"Opendota","f":"Free, keyless (60 rpm, 50k/mo)","p":"$0.01 per call (premium tier)","b":"Dota 2 matches, players, heroes, pro stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PandaScore Esports API","u":"https://developers.pandascore.co/docs/introduction","co":"Pandascore","f":"Free plan, 1000 req/hr, fixtures-only","p":"Paid (custom/quote) for live + historical","b":"Esports scores, schedules, odds across many titles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PUBG Developer API","u":"https://documentation.pubg.com/","co":"Pubg","f":"Free w/ key (rate-limited)","p":"n/a","b":"PUBG match results, player stats, telemetry, leaderboards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"RAWG Video Games Database","u":"https://rawg.io/apidocs","co":"Rawg","f":"Free w/ key, 20k req/mo, <100k MAU free","p":"~$5/mo (Business tier)","b":"Largest game discovery DB, 500k+ games, ratings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Riot Data Dragon","u":"https://developer.riotgames.com/docs/lol","co":"Riotgames","f":"Free, keyless (static asset CDN)","p":"n/a","b":"LoL static data: champions, items, images, versions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Riot Games API (LoL/Valorant/TFT)","u":"https://developer.riotgames.com/","co":"Riotgames","f":"Free dev key (24h), personal/production keys","p":"n/a (rate-limited free)","b":"LoL/Valorant/TFT match history, ranked, profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Steam Storefront API","u":"https://store.steampowered.com/api/appdetails","co":"Steampowered","f":"Free, keyless (unofficial/undocumented)","p":"n/a","b":"Store app details, prices, descriptions by appid","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Steam Web API (Steamworks)","u":"https://steamcommunity.com/dev","co":"Steamcommunity","f":"Free; many public methods keyless, others need key","p":"n/a","b":"Player profiles, owned games, achievements, news, stats","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"SteamSpy","u":"https://steamspy.com/api.php","co":"Steamspy","f":"Free, keyless","p":"n/a","b":"Estimated Steam game ownership, playtime, sales stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"STRATZ (Dota 2)","u":"https://docs.stratz.com/","co":"Stratz","f":"Free w/ key (GraphQL, rate-limited)","p":"Paid plans (custom)","b":"Advanced Dota 2 GraphQL stats, matches, players","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TheGamesDB API","u":"https://api.thegamesdb.net/","co":"Thegamesdb","f":"Free w/ key (forum/key.php request, 1000 queries/mo)","p":"n/a","b":"Open game metadata + box art/artwork for HTPC/retro","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tracker Network (Tracker.gg) Developer API","u":"https://tracker.gg/developers","co":"Tracker","f":"Free for hobby/non-commercial (attribution)","p":"Paid commercial tiers (custom)","b":"Multi-game stats: Apex, CSGO, Division 2, Splitgate","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Twitch API (Helix)","u":"https://dev.twitch.tv/docs/api/","co":"Twitch","f":"Free w/ OAuth client (rate-limited)","p":"n/a","b":"Live streams, channels, games, viewer counts, clips","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Abios (Kambi) Esports Data API","u":"https://abiosgaming.com/","co":"Abiosgaming","f":"none (trial on request)","p":"Paid (custom/quote)","b":"Live esports scores, in-play stats, betting widgets","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"MobyGames API","u":"https://www.mobygames.com/info/api/","co":"Mobygames","f":"none (paid since Sept 2024)","p":"$9.99/mo Hobbyist tier","b":"Oldest/largest video game metadata database","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Genomics & bioinformatics data resources","count":29,"entries":[{"n":"AlphaFold Protein Structure DB API","u":"https://alphafold.ebi.ac.uk/api-docs","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Predicted protein 3D structures by UniProt accession","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Bgee Gene Expression API","u":"https://www.bgee.org/","co":"Bgee","f":"Free, keyless","p":"n/a","b":"Curated normal gene expression / comparative transcriptomics across animals","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ClinGen Allele Registry (CAR)","u":"https://reg.clinicalgenome.org/","co":"Clinicalgenome","f":"Free, keyless reads (registration needs login for writes)","p":"n/a","b":"Canonical allele identifiers (CAids) for genetic variants","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ClinVar (via NCBI E-utilities / VCV)","u":"https://www.ncbi.nlm.nih.gov/clinvar/docs/maintenance_use/","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Clinical significance of human genetic variants","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EBI Ontology Lookup Service (OLS4) API","u":"https://www.ebi.ac.uk/ols4/help","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Query biomedical ontologies (GO, HP, MONDO, EFO, etc.) via REST","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EBI Proteins API","u":"https://www.ebi.ac.uk/proteins/api/doc/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Protein features, variation, proteomics, antigens, genome coords","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EBI Search REST API","u":"https://www.ebi.ac.uk/ebisearch/documentation/rest-api","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Cross-database text search across all EMBL-EBI resources","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ENA (European Nucleotide Archive) Portal API","u":"https://www.ebi.ac.uk/ena/portal/api/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Raw and assembled nucleotide sequence reads and records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ensembl REST API","u":"https://rest.ensembl.org/","co":"Ensembl","f":"Free, keyless (rate-limited ~15 req/s, 55k/hour)","p":"n/a","b":"Genes, transcripts, variants, comparative genomics, sequence retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ensembl VEP (via REST)","u":"https://rest.ensembl.org/documentation/info/vep_hgvs_get","co":"Ensembl","f":"Free, keyless (~15 req/s)","p":"n/a","b":"Variant Effect Predictor consequence annotation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"gnomAD GraphQL API","u":"https://gnomad.broadinstitute.org/api","co":"Broadinstitute","f":"Free, keyless (IP-level rate limiting)","p":"n/a","b":"Population allele frequencies and variant constraint data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Human Phenotype Ontology (HPO) API","u":"https://clinicaltables.nlm.nih.gov/apidoc/hpo/v3/doc.html","co":"NLM (NIH)","f":"Free, keyless","p":"n/a","b":"Phenotype terms for human disease / clinical genomics annotation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"InterPro REST API (EMBL-EBI)","u":"https://www.ebi.ac.uk/interpro/api/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"Protein families, domains, and functional sites","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"KEGG REST API","u":"https://www.kegg.jp/kegg/rest/keggapi.html","co":"Kegg","f":"Free, keyless for academic users (rest.kegg.jp)","p":"Commercial license required for non-academic use (via Pathway Solutions)","b":"Pathways, genes, compounds, and disease mappings","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyGene.info","u":"https://mygene.info/","co":"Mygene","f":"Free, keyless","p":"n/a","b":"Gene annotation and ID conversion across species","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyVariant.info","u":"https://myvariant.info/","co":"Myvariant","f":"Free, keyless","p":"n/a","b":"Aggregated variant annotation across dbSNP, ClinVar, gnomAD, etc.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NCBI Datasets API (v2)","u":"https://www.ncbi.nlm.nih.gov/datasets/docs/v2/api/rest-api/","co":"NCBI (NIH)","f":"Free, keyless; higher limits with NCBI API key","p":"n/a","b":"Genome assemblies, gene, and taxonomy data downloads","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NCBI E-utilities (Entrez)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s); 10 req/s with free API key","p":"n/a","b":"Programmatic search/fetch across NCBI databases (gene, nucleotide, PubMed)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NCBI Variation Services (SPDI) API","u":"https://api.ncbi.nlm.nih.gov/variation/v0/","co":"NCBI (NIH)","f":"Free, keyless (beta; ~1 req/s recommended)","p":"n/a","b":"Variant normalization (SPDI), rsID lookup via dbSNP/ClinVar dataflow","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NHGRI-EBI GWAS Catalog REST API","u":"https://www.ebi.ac.uk/gwas/rest/docs/api","co":"EMBL-EBI","f":"Free, keyless (v1 + newer v2)","p":"n/a","b":"Genome-wide association study SNP-trait associations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Targets Platform GraphQL API","u":"https://platform-docs.opentargets.org/data-access/graphql-api","co":"Opentargets","f":"Free, keyless","p":"n/a","b":"Gene-disease target identification and evidence","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PDBe (EMBL-EBI) REST API","u":"https://www.ebi.ac.uk/pdbe/api/doc/","co":"EMBL-EBI","f":"Free, keyless","p":"n/a","b":"European PDB mirror: structure, validation, mappings (SIFTS)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubChem PUG REST API","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (max 5 req/s, 400/min)","p":"n/a","b":"Chemical compounds, bioassays, and gene/protein targets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RCSB PDB Data API","u":"https://data.rcsb.org/","co":"RCSB PDB","f":"Free, keyless (REST + GraphQL)","p":"n/a","b":"3D macromolecular structure data by PDB identifier","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RCSB PDB Search API","u":"https://search.rcsb.org/","co":"RCSB PDB","f":"Free, keyless","p":"n/a","b":"Querying/searching the PDB structure archive with Boolean logic","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Reactome Content Service API","u":"https://reactome.org/ContentService/","co":"Reactome","f":"Free, keyless","p":"n/a","b":"Curated biological pathways and reactions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"STRING-DB API","u":"https://string-db.org/help/api/","co":"String db","f":"Free, keyless (academic); rate-limited","p":"n/a","b":"Protein-protein interaction networks","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCSC Genome Browser REST API","u":"https://genome.ucsc.edu/goldenPath/help/api.html","co":"Ucsc","f":"Free, keyless (~1 req/s recommended; botDelay throttling)","p":"n/a","b":"Genome assembly tracks, sequence, and annotation data via REST","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UniProt REST API","u":"https://www.uniprot.org/help/api","co":"UniProt","f":"Free, keyless; ID-mapping jobs capped at 100k IDs","p":"n/a","b":"Protein sequences, functional annotation, cross-references","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Geography, GIS & Urban studies","count":38,"entries":[{"n":"Copernicus Data Space Ecosystem (Sentinel)","u":"https://dataspace.copernicus.eu/analyse/apis","co":"Copernicus","f":"Free w/ registration (STAC, OData, openEO, Sentinel Hub)","p":"Paid quota top-ups","b":"Sentinel/Landsat satellite imagery & processing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Esri ArcGIS Location Platform","u":"https://developers.arcgis.com/rest/","co":"Arcgis","f":"Free tier w/ key (geocoding, routing, tiles credits)","p":"Pay-as-you-go / subscription","b":"Geocoding, routing, basemaps, spatial analysis","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Foursquare Open Source Places","u":"https://opensource.foursquare.com/os-places/","co":"Foursquare","f":"Free bulk download (Apache 2.0; HuggingFace/portal)","p":"n/a (paid Places API separate)","b":"100M+ global POIs open dataset","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GADM (Global Administrative Areas)","u":"https://gadm.org/data.html","co":"Gadm","f":"Free download, no key (non-commercial only)","p":"n/a (license for commercial)","b":"Detailed multi-level admin boundaries worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Geoapify","u":"https://www.geoapify.com/","co":"Geoapify","f":"Free w/ key (3k req/day; geocoding, routing, tiles)","p":"From ~$49/mo","b":"Geocoding, places, routing, isolines, maps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"geoBoundaries","u":"https://www.geoboundaries.org/api.html","co":"Geoboundaries","f":"Free, keyless API + bulk download (CC BY)","p":"n/a","b":"Open admin boundaries, commercial-use allowed","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Geocode Earth (Pelias)","u":"https://geocode.earth/docs/","co":"Geocode","f":"Free trial w/ key (open-source Pelias engine)","p":"From ~$200/mo","b":"Hosted open-data geocoding & autocomplete","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GeoNames","u":"https://www.geonames.org/export/web-services.html","co":"Geonames","f":"Free w/ free username (daily credit limits)","p":"Commercial plans from ~ low monthly","b":"Global gazetteer, place names, admin lookups","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GraphHopper Directions API","u":"https://docs.graphhopper.com/","co":"Graphhopper","f":"Free w/ key (limited daily; routing, isochrone, matrix)","p":"From ~$57/mo","b":"Routing, isochrones, GTFS transit on OSM","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Humanitarian Data Exchange (HDX) / HOT","u":"https://data.humdata.org/","co":"Humdata","f":"Free, keyless API (CKAN; HOT export tool)","p":"n/a","b":"Humanitarian geospatial & boundary datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LocationIQ","u":"https://locationiq.com/","co":"Locationiq","f":"Free w/ key (5k req/day, geocoding+tiles)","p":"From ~$50/mo","b":"Geocoding, maps, routing on OSM data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mapbox","u":"https://docs.mapbox.com/api/","co":"Mapbox","f":"Free w/ key (generous monthly free quotas)","p":"Pay-as-you-go beyond free tier","b":"Maps, geocoding, navigation, satellite tiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"MapTiler Cloud","u":"https://docs.maptiler.com/cloud/api/","co":"Maptiler","f":"Free w/ key (100k tiles/mo, geocoding)","p":"From ~$25/mo","b":"Vector/raster basemap tiles & geocoding","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft Building Footprints","u":"https://github.com/microsoft/GlobalMLBuildingFootprints","co":"Microsoft","f":"Free, keyless bulk download (ODbL)","p":"n/a","b":"ML-generated global building footprint polygons","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA Earthdata / CMR","u":"https://www.earthdata.nasa.gov/engage/open-data-services-software/earthdata-developer-portal","co":"NASA","f":"Free w/ Earthdata Login (CMR search API)","p":"n/a","b":"Earth science & satellite data discovery/download","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Natural Earth","u":"https://www.naturalearthdata.com/","co":"Naturalearthdata","f":"Free, public domain, keyless bulk data","p":"n/a","b":"Public-domain cartographic vector/raster base layers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Topo Data","u":"https://www.opentopodata.org/api/","co":"Opentopodata","f":"Free, keyless public instance (1k/day, 1 req/s)","p":"n/a (self-host)","b":"Elevation lookups from multiple DEM datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open-Meteo Geocoding API","u":"https://open-meteo.com/en/docs/geocoding-api","co":"Open meteo","f":"Free, keyless for non-commercial","p":"Commercial API key plan","b":"Lightweight place-name search with coordinates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAddresses","u":"https://openaddresses.io/","co":"Openaddresses","f":"Free, keyless bulk download (gov-sourced)","p":"n/a","b":"Hundreds of millions of authoritative address points","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenCage Geocoding API","u":"https://opencagedata.com/api","co":"Opencagedata","f":"Free trial w/ key (2,500 req/day)","p":"From ~$50/mo","b":"Worldwide forward/reverse geocoding, enrichment","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenCelliD","u":"https://opencellid.org/","co":"Opencellid","f":"Free w/ key (cell-tower DB, daily limits)","p":"n/a","b":"Open cell-tower geolocation database","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenRouteService","u":"https://openrouteservice.org/dev/#/api-docs","co":"Openrouteservice","f":"Free w/ key (~2k req/day, isochrones, matrix)","p":"Enterprise/self-host","b":"Routing, isochrones, matrix on OSM data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenStreetMap Editing API (v0.6)","u":"https://wiki.openstreetmap.org/wiki/API_v0.6","co":"OpenStreetMap","f":"Free; read keyless, writes need OAuth","p":"n/a","b":"Reading/editing raw OSM nodes, ways, relations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenStreetMap Nominatim","u":"https://nominatim.org/release-docs/latest/api/Overview/","co":"Nominatim","f":"Free, keyless (public instance, ~1 req/s fair use)","p":"n/a (self-host or commercial mirrors)","b":"Forward/reverse geocoding from OSM data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenStreetMap Overpass API","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless (public instances, fair-use rate limits)","p":"n/a","b":"Querying raw OSM map features by tag/area","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenStreetMap Standard Tile Layer","u":"https://operations.osmfoundation.org/policies/tiles/","co":"Osmfoundation","f":"Free, keyless raster tiles (strict usage policy)","p":"n/a","b":"OSM raster basemap tiles for light use","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenTopography","u":"https://opentopography.org/developers","co":"Opentopography","f":"Free w/ key (USGS 3DEP, SRTM raster API)","p":"n/a","b":"High-res topographic/LiDAR DEM data access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OSRM (Open Source Routing Machine)","u":"http://project-osrm.org/docs/v5.24.0/api/","co":"Project osrm","f":"Free, keyless demo server (fair use)","p":"n/a (self-host)","b":"Fast car/bike/foot routing on OSM","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Overture Maps Foundation","u":"https://docs.overturemaps.org/","co":"Overturemaps","f":"Free, keyless bulk GeoParquet (CC/ODbL)","p":"n/a","b":"Open global places, buildings, transportation, admins","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Protomaps","u":"https://protomaps.com/api","co":"Protomaps","f":"Free w/ key for non-commercial (~1M tiles/mo soft limit)","p":"Self-host (open source) / GitHub Sponsor for commercial","b":"Single-file PMTiles vector basemaps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stadia Maps","u":"https://docs.stadiamaps.com/","co":"Stadiamaps","f":"Free tier w/ key (~2,500 credits/mo)","p":"Paid plans from ~$20/mo","b":"Map tiles, Pelias geocoding, routing APIs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Thunderforest","u":"https://www.thunderforest.com/docs/map-tiles-api/","co":"Thunderforest","f":"Free w/ key (150k tiles/mo)","p":"From ~£15/mo","b":"Themed OSM raster tile styles (Outdoors, Transport)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transitland","u":"https://www.transit.land/documentation","co":"Transit","f":"Free w/ key (aggregated GTFS feeds API)","p":"Pro tier (paid)","b":"Global transit feeds, routes, stops registry","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"US Census TIGER/Geocoder","u":"https://geocoding.geo.census.gov/geocoder/","co":"U.S. Census Bureau","f":"Free, keyless (US address geocoding + geographies)","p":"n/a","b":"US address geocoding to census geographies","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS EarthExplorer / M2M API","u":"https://m2m.cr.usgs.gov/","co":"USGS","f":"Free w/ USGS account (Landsat, aerial)","p":"n/a","b":"Landsat & USGS scene search and download","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"what3words API","u":"https://developer.what3words.com/public-api","co":"What3words","f":"Free w/ key (limited; convert/autosuggest)","p":"Paid plans for higher volume","b":"3-word address geocoding to coordinates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Who's On First (gazetteer)","u":"https://whosonfirst.org/","co":"Whosonfirst","f":"Free, keyless bulk download (CC0/CC-BY)","p":"n/a","b":"Open global gazetteer of places with hierarchies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WorldPop","u":"https://www.worldpop.org/sdi/introapi/","co":"Worldpop","f":"Free, keyless REST API (1000 calls/day; key for more)","p":"n/a","b":"Gridded population & demographic datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Geospatial basemaps, satellite imagery & EO","count":30,"entries":[{"n":"Census Geocoder","u":"https://geocoding.geo.census.gov/geocoder/","co":"U.S. Census Bureau","f":"Free, keyless","p":"n/a","b":"US address geocoding and geography lookup","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Copernicus Data Space Ecosystem","u":"https://dataspace.copernicus.eu/analyse/apis","co":"Copernicus","f":"Free w/ account, monthly quotas (STAC/OData/openEO/Sentinel Hub)","p":"Commercial for large-scale processing","b":"Sentinel-1/2/3/5P EO data search and download","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Earth on AWS / Element84 Earth Search STAC","u":"https://earth-search.aws.element84.com/v1","co":"Element84","f":"Free, keyless STAC API","p":"n/a","b":"STAC search of Sentinel-2, Sentinel-1, Landsat, NAIP on AWS","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Esri ArcGIS Location Platform","u":"https://developers.arcgis.com/","co":"Arcgis","f":"Free tier w/ monthly credits","p":"Pay-as-you-go","b":"Basemaps, geocoding, imagery, GIS services","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Geoapify","u":"https://www.geoapify.com/","co":"Geoapify","f":"Free w/ key, 3,000 req/day","p":"~€49/mo (300k req/mo)","b":"Maps, geocoding, routing, places, isolines","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Earth Engine","u":"https://earthengine.google.com/","co":"Google","f":"Free for noncommercial/research w/ registered account","p":"Commercial paid plans","b":"Planetary-scale EO analysis catalog and compute","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Google Maps Platform","u":"https://developers.google.com/maps/documentation","co":"Google","f":"Free w/ key, per-SKU free tier (10k Essentials events/mo)","p":"Pay-as-you-go per SKU","b":"Basemaps, satellite tiles, geocoding, routes, places","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"HERE Location Services","u":"https://www.here.com/get-started/pricing","co":"HERE","f":"Free w/ key, 250,000 transactions/mo (freemium, no card)","p":"~$1 per 1,000 transactions beyond free","b":"Basemaps, geocoding, routing, traffic, mobile SDKs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mapbox","u":"https://docs.mapbox.com/api/","co":"Mapbox","f":"Free w/ key, generous monthly free quotas","p":"Pay-as-you-go beyond free tier","b":"Vector basemaps, satellite tiles, geocoding, navigation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"MapTiler Cloud","u":"https://www.maptiler.com/cloud/","co":"Maptiler","f":"Free w/ key (non-commercial, monthly request/session quota)","p":"~$25/mo (Flex)","b":"Vector/raster basemap tiles, styles, geocoding","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft Planetary Computer STAC API","u":"https://planetarycomputer.microsoft.com/docs/","co":"Microsoft","f":"Free; STAC search keyless/anonymous, compute hub needs free account","p":"n/a","b":"Petabyte STAC catalog of Sentinel/Landsat/MODIS COGs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA Earthdata / CMR (Common Metadata Repository)","u":"https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html","co":"NASA","f":"Free; search keyless, download needs Earthdata Login","p":"n/a","b":"Discovering all NASA EOSDIS Earth-science granules","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA GIBS (Global Imagery Browse Services)","u":"https://nasa-gibs.github.io/gibs-api-docs/","co":"NASA","f":"Free, keyless (WMTS/WMS/TWMS/tiles)","p":"n/a","b":"Near-real-time full-resolution satellite imagery tiles","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA SRTM / NASADEM (LP DAAC)","u":"https://lpdaac.usgs.gov/products/nasadem_hgtv001/","co":"USGS","f":"Free via Earthdata Login","p":"n/a","b":"Global 30m digital elevation models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NASA Worldview / WMTS","u":"https://worldview.earthdata.nasa.gov/","co":"NASA","f":"Free, keyless","p":"n/a","b":"Browsing near-real-time global satellite imagery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Nominatim (OSM)","u":"https://nominatim.org/release-docs/latest/api/Overview/","co":"Nominatim","f":"Free, keyless (public, 1 req/s policy)","p":"n/a","b":"Geocoding and reverse geocoding from OSM data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open-Elevation","u":"https://open-elevation.com/","co":"Open elevation","f":"Free w/ key, ~1,000 req/mo (self-host option available)","p":"Paid plans for higher volume","b":"Simple open global elevation lookups","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAerialMap","u":"https://docs.openaerialmap.org/","co":"Openaerialmap","f":"Free, keyless STAC/OAM API and TMS tiles","p":"n/a","b":"Open CC-BY satellite/drone aerial imagery search and tiles","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openEO Platform","u":"https://openeo.cloud/","co":"Openeo","f":"Free w/ account; CDSE backend ~10k credits/mo (federated)","p":"Backend/credit dependent","b":"Standardized cloud EO processing across backends","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenStreetMap Overpass API","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless (public instances)","p":"n/a","b":"Querying raw OSM vector map features/geometry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenStreetMap Tile Servers","u":"https://operations.osmfoundation.org/policies/tiles/","co":"Osmfoundation","f":"Free raster tiles (fair-use policy)","p":"n/a","b":"Standard OSM raster basemap tiles","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenTopography","u":"https://opentopography.org/developers","co":"Opentopography","f":"Free w/ API key (200 calls/day academic, 50/day non-academic)","p":"OpenTopography Plus / Enterprise for higher limits","b":"Global DEM, SRTM, NASADEM, USGS 3DEP, lidar terrain access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Overture Maps Foundation Open Map Data","u":"https://docs.overturemaps.org/","co":"Overturemaps","f":"Free, open (GeoParquet on S3/Azure, query via DuckDB/CLI)","p":"n/a","b":"Open global basemap data: places, buildings, transport, divisions","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Sentinel Hub","u":"https://www.sentinel-hub.com/develop/api/","co":"Sentinel hub","f":"Free tier via Copernicus Data Space (limited monthly PU quota)","p":"~€30/mo","b":"On-the-fly Sentinel/Landsat processing and tiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"STAC Index","u":"https://stacindex.org/","co":"Stacindex","f":"Free, keyless directory","p":"n/a","b":"Discovering public STAC catalogs and APIs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Stadia Maps","u":"https://stadiamaps.com/","co":"Stadiamaps","f":"Free developer plan (non-commercial/low-volume) + 14-day trial","p":"~$20/mo","b":"Privacy-focused basemaps, geocoding, routing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USGS 3DEP / National Map Elevation Point Query Service (EPQS)","u":"https://apps.nationalmap.gov/epqs/","co":"Nationalmap","f":"Free, keyless","p":"n/a","b":"US point elevation and 3DEP terrain queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS Landsat (AWS Open Data / LandsatLook)","u":"https://www.usgs.gov/landsat-missions/landsat-data-access","co":"USGS","f":"Free, open archive","p":"n/a","b":"Free Landsat scene access via cloud COGs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"USGS M2M / EarthExplorer API","u":"https://m2m.cr.usgs.gov/","co":"USGS","f":"Free w/ ERS account (M2M access must be requested/approved)","p":"n/a","b":"Programmatic search/download of Landsat and 300+ datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USGS National Map (TNM Access API)","u":"https://apps.nationalmap.gov/tnmaccess/","co":"Nationalmap","f":"Free, keyless","p":"n/a","b":"US topo maps, imagery, hydrography, boundaries, elevation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Government & scientific data portals","count":30,"entries":[{"n":"api.data.gov (shared US gov API key gateway)","u":"https://api.data.gov/","co":"Data.gov","f":"Free; one key works across participating federal APIs","p":"n/a","b":"Single key for many US federal agency APIs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless; ~3 req/s, Atom XML","p":"n/a","b":"STEM preprint metadata search and retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CORE API (open access aggregator)","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key for personal/research use; rate-limited","p":"Commercial/enterprise plans (custom)","b":"Largest open-access full-text paper aggregation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless; polite pool w/ email","p":"Metadata Plus subscription (custom)","b":"150M+ DOI scholarly metadata, references, funders","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.europa.eu (EU Open Data Portal)","u":"https://data.europa.eu/en/which-apis-are-available-and-where-can-i-find-information-about-them","co":"European Union","f":"Free, keyless; Search, SPARQL, Registry APIs","p":"n/a","b":"EU/member-state datasets, SPARQL linked-data queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.gov (US Catalog API / CKAN)","u":"https://data.gov/developers/apis/","co":"Data.gov","f":"Free; CKAN catalog API keyless","p":"n/a","b":"US federal/state/local dataset metadata discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.gov.au API (CKAN)","u":"https://data.gov.au/data/api/3/action/","co":"Data.gov","f":"Free, keyless CKAN action API","p":"n/a","b":"Australian government open dataset discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"data.gov.in (OGD Platform India) API","u":"https://www.data.gov.in/apis","co":"Data.gov","f":"Free w/ key; 130k+ resource APIs","p":"n/a","b":"Indian government datasets, resource-level APIs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"data.gov.uk API (CKAN)","u":"https://guidance.data.gov.uk/get_data/api_documentation/","co":"Data.gov","f":"Free, keyless; no rate limits; package_search","p":"n/a","b":"UK government open dataset metadata search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless public read of DOI metadata","p":"Membership for minting DOIs (custom)","b":"Research-data DOI metadata search and retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOE PAGES / Data Explorer API (OSTI)","u":"https://www.osti.gov/pages/api/v1/docs","co":"OSTI (DOE)","f":"Free, keyless REST","p":"n/a","b":"DOE peer-reviewed publications and research datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Dryad API","u":"https://datadryad.org/api/v2/docs/","co":"Datadryad","f":"Free, keyless public read; OAuth for deposit","p":"n/a","b":"Curated research data publication repository","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ERIC (Education Resources Information Center) API","u":"https://eric.ed.gov/?api=","co":"U.S. Dept of Education","f":"Free, keyless JSON/XML bibliographic export","p":"n/a","b":"Education research literature and ERIC records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Europe PMC RESTful API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless; 40M+ life-science publications, full text","p":"n/a","b":"Life-science literature, full text, preprints, patents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"European Parliament Open Data API","u":"https://data.europarl.europa.eu/en/developer-corner/opendata-api","co":"European Union","f":"Free, keyless REST","p":"n/a","b":"MEPs, plenary votes, EU parliamentary documents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Figshare API","u":"https://docs.figshare.com/","co":"Figshare","f":"Free; public search keyless, upload needs token","p":"n/a","b":"Research data/figures repository with DOIs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GovInfo API (US GPO)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Free w/ api.data.gov key","p":"n/a","b":"Official US federal publications across all branches","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NASA ADS (Astrophysics Data System) API","u":"https://ui.adsabs.harvard.edu/help/api/","co":"Harvard","f":"Free w/ token; ~5000 queries/day","p":"n/a","b":"Astronomy/astrophysics literature search, metrics, export","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA Open APIs (api.nasa.gov)","u":"https://api.nasa.gov/","co":"NASA","f":"Free; DEMO_KEY keyless (low limits) or free key","p":"n/a","b":"NASA imagery, APOD, NEO and mission data","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIH RePORTER API","u":"https://api.reporter.nih.gov/","co":"NIH RePORTER","f":"Free, keyless REST (v2)","p":"n/a","b":"NIH-funded research projects, grantees, publications","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Government Canada API (open.canada.ca CKAN)","u":"https://open.canada.ca/en/access-our-application-programming-interface-api","co":"Government of Canada","f":"Free, keyless CKAN GET API","p":"n/a","b":"Canadian federal open dataset metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/","co":"OpenAIRE","f":"Free, keyless public search; token for higher limits","p":"n/a","b":"EU open-science research graph, projects, products","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless; ~100k calls/day (polite pool w/ email)","p":"Premium tier for higher limits/snapshots","b":"250M+ scholarly works, authors, institutions graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OSTI.gov API (DOE Scientific & Technical Info)","u":"https://www.osti.gov/api/v1/docs","co":"OSTI (DOE)","f":"Free, keyless REST; JSON/XML/BibTeX","p":"n/a","b":"DOE-funded research reports and STI metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubMed / NCBI E-utilities (Entrez)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free; 3 req/s keyless, 10 req/s w/ free key","p":"n/a","b":"Biomedical literature and 38 NCBI databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Semantic Scholar Academic Graph API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free keyless (shared limit); free key for higher RPS","p":"n/a","b":"200M+ papers, citations, embeddings, recommendations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Unpaywall REST API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free, keyless (email param); 100k calls/day","p":"n/a","b":"Open-access full-text locations for any DOI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS ScienceBase API","u":"https://www.usgs.gov/sciencebase-instructions-and-documentation/api-and-web-services","co":"USGS","f":"Free, keyless REST read (?format=json); Python/R clients","p":"n/a","b":"USGS scientific data catalog and stewardship","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Bank Data / Data Catalog API","u":"https://datahelpdesk.worldbank.org/knowledgebase/articles/889392","co":"World Bank","f":"Free, keyless REST","p":"n/a","b":"Global development indicators and data catalog","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Zenodo REST API (CERN/OpenAIRE)","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free; search keyless, deposit needs token","p":"n/a","b":"Research data/software repository, DOIs, OAI-PMH","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Government procurement, contracts & corporate registries","count":26,"entries":[{"n":"ABN Lookup Web Services (Australia)","u":"https://abr.business.gov.au/Tools/WebServices","co":"Business","f":"Free w/ registered GUID/key","p":"n/a","b":"Australian Business Register ABN/ACN/name lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AusTender OCDS API","u":"https://github.com/austender/austender-ocds-api","co":"Austender","f":"Free, keyless OCDS JSON (Swagger at app.swaggerhub.com/apis/austender/ocds-api)","p":"n/a","b":"Australian gov contract notices since 2013","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Brazil Compras.gov.br open data API","u":"https://dadosabertos.compras.gov.br/swagger-ui/index.html","co":"Compras","f":"Free, keyless open data API (JSON/CSV)","p":"n/a","b":"Brazilian federal procurement bids & contracts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Brazil PNCP (Portal Nacional de Contratacoes Publicas) API","u":"https://pncp.gov.br/api/pncp/swagger-ui/index.html","co":"Pncp","f":"Free, keyless query/consult REST API (auth only for data submission)","p":"n/a","b":"Brazil national procurement plans, contracts, price registries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CanadaBuys / Open Government tenders","u":"https://canadabuys.canada.ca/en/procurement-and-contracting-data","co":"Government of Canada","f":"Free, keyless OCDS data files (tender/award/contract history)","p":"n/a","b":"Canadian federal tender & contract award data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GLEIF LEI API","u":"https://www.gleif.org/en/lei-data/gleif-api","co":"Gleif","f":"Free, keyless, no registration","p":"n/a","b":"Legal Entity Identifier lookup & corporate hierarchy","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GSA CALC+ Quick Rate API (DX CALC+)","u":"https://open.gsa.gov/api/dx-calc-api/","co":"U.S. GSA","f":"Free, keyless","p":"n/a","b":"GSA schedule awarded labor rate price benchmarking","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"INSEE Sirene API","u":"https://www.data.gouv.fr/dataservices/api-sirene-open-data","co":"Gouv","f":"Free w/ free account/key (bulk files keyless on data.gouv.fr)","p":"n/a","b":"French company register (SIREN/SIRET) ~31M entities","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"OCCRP Aleph API","u":"https://docs.aleph.occrp.org/developers/","co":"Occrp","f":"Free w/ account/API key; public datasets searchable; self-hostable (OSS)","p":"n/a","b":"Investigative search across registries, leaks, lists","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OFAC Sanctions List Service (SLS) API","u":"https://ofac.treasury.gov/sanctions-list-service","co":"U.S. Treasury","f":"Free, keyless (SDN/Consolidated lists, RESTful exports)","p":"n/a","b":"US Treasury sanctioned-entity list data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Ownership bulk BODS data","u":"https://bods-data.openownership.org/","co":"Openownership","f":"Free open data (bulk BODS JSON, ~10GB; UK/Denmark/Slovakia)","p":"n/a","b":"Beneficial ownership relationships across jurisdictions","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenCorporates API","u":"https://api.opencorporates.com/","co":"Opencorporates","f":"Free for open/reuse w/ token; limited rate","p":"Paid plans for commercial/bulk use (quote-based)","b":"Global company register, 200M+ firms, 145+ jurisdictions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenSanctions API","u":"https://www.opensanctions.org/docs/api/","co":"Opensanctions","f":"Free API key for journalists/academics/non-commercial","p":"Pay-as-you-go (volume discounts from 20k req/mo) or data license","b":"Sanctions, PEPs, watchlist entity screening","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SAM.gov Entity Management API","u":"https://open.gsa.gov/api/entity-api/","co":"U.S. GSA","f":"Free w/ key (federal/non-federal role & permission limits)","p":"n/a","b":"US gov contractor registration / UEI entity lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Get Opportunities (Public API)","u":"https://open.gsa.gov/api/get-opportunities-public-api/","co":"U.S. GSA","f":"Free w/ key; non-federal 10 req/day, federal 1,000 req/day","p":"n/a","b":"US federal contract opportunities & solicitations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SEC EDGAR APIs (data.sec.gov)","u":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces","co":"U.S. SEC","f":"Free, keyless (fair-access rate limits, needs User-Agent header)","p":"n/a","b":"US public-company filings, CIK, tickers, XBRL facts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"TED (Tenders Electronic Daily) API","u":"https://docs.ted.europa.eu/api/latest/index.html","co":"European Union","f":"Free; Search API anonymous/keyless (key only for submitting notices)","p":"n/a","b":"EU-wide public procurement tender notices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"TED Open Data Service (SPARQL)","u":"https://data.ted.europa.eu/","co":"European Union","f":"Free, keyless SPARQL / RDF + XML bulk","p":"n/a","b":"Bulk EU procurement linked open data analysis","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UK Companies House API","u":"https://developer.company-information.service.gov.uk/","co":"UK Government","f":"Free w/ key; 600 req/5 min","p":"n/a","b":"UK company register, officers, PSC beneficial owners","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UK Contracts Finder API","u":"https://www.contractsfinder.service.gov.uk/apidocumentation","co":"UK Government","f":"Free, keyless (OCDS JSON/XML search & retrieval)","p":"n/a","b":"UK sub-threshold gov contracts & tenders","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UK Find a Tender Service API","u":"https://www.find-tender.service.gov.uk/Developer/Documentation","co":"UK Government","f":"Free, but requires a CDP-Api-Key header (not keyless)","p":"n/a","b":"UK high-value (post-Brexit OJEU) tender notices, OCDS 1.1","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"USAspending.gov API","u":"https://api.usaspending.gov/","co":"USAspending","f":"Free, keyless","p":"n/a","b":"US federal contract/grant award spending data","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USPTO PatentsView / Open Data Portal API (assignees)","u":"https://patentsview.org/apis/api-endpoints/assignees","co":"PatentsView","f":"Free w/ key; migrated to USPTO Open Data Portal (data.uspto.gov) Mar 20 2026","p":"n/a","b":"Patent assignee / company IP entity resolution","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"VIES VAT Number Validation (EU)","u":"https://ec.europa.eu/taxation_customs/vies","co":"European Commission","f":"Free, keyless SOAP + REST service","p":"n/a","b":"Validating EU VAT numbers, returns name/address","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Crunchbase API","u":"https://about.crunchbase.com/products/crunchbase-api","co":"Crunchbase","f":"none (legacy free Basic tier discontinued in 2025)","p":"Paid; Basic API ~$49/mo (Pro ~$99/mo) plus enterprise data packages","b":"Startup firmographics, funding, investor data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Sayari API","u":"https://documentation.sayari.com/api/","co":"Sayari","f":"none (commercial; trial via sales)","p":"Paid (enterprise, quote-based)","b":"Cross-border ownership, supply chain, risk graph (800M+ companies)","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Grants & funding","count":23,"entries":[{"n":"Candid Grants API (formerly Foundation Center)","u":"https://developer.candid.org/reference/faqs-grants-api","co":"Candid","f":"30-day free trial only","p":"Paid subscription (quote-based)","b":"US foundation/philanthropy grants, funders, recipients","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CORDIS EU Research Projects (Open Data)","u":"https://cordis.europa.eu/about/services","co":"European Union","f":"Free, keyless bulk CSV/XML/JSON via data.europa.eu + SPARQL endpoint","p":"n/a","b":"EU Horizon Europe/H2020 funded projects and participants","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Crossref Open Funder Registry / Funders API","u":"https://www.crossref.org/documentation/funder-registry/funder-data-via-the-api/","co":"Crossref","f":"Free, keyless (api.crossref.org/funders)","p":"n/a","b":"Funder taxonomy IDs (DOIs) and linked works","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Crossref REST API (Grants metadata)","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (polite pool w/ email)","p":"Plus paid tier for guaranteed SLA","b":"Registered grant DOIs: investigators, amounts, award links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API (Awards / FundingReference)","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless for read/search","p":"Membership fees to mint DOIs","b":"Award DOIs and funding references linked to research outputs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Dimensions Analytics API (Grants)","u":"https://docs.dimensions.ai/dsl/datasource-grants.html","co":"Dimensions","f":"Free Covid-19 sample + free BigQuery sample only","p":"Paid subscription (quote-based)","b":"7M+ global research grants with publication linkage","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EU Funding & Tenders Portal (SEDIA) APIs","u":"https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/support/apis","co":"European Commission","f":"Free; some endpoints need login/token","p":"n/a","b":"EU calls for proposals, topics, tenders single entry point","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Europe PMC GRIST (Grants RESTful) API","u":"https://europepmc.org/GristAPI","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Biomedical research grants from 37 European funders","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Grants.gov Search2 API","u":"https://www.grants.gov/api/api-guide","co":"Grants.gov","f":"Free, keyless (search2 needs no auth)","p":"n/a","b":"Search open US federal grant funding opportunities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HHS TAGGS (Tracking Accountability in Govt Grants)","u":"https://taggs.hhs.gov/","co":"Hhs","f":"Free public search + downloadable reports (CSV/XLS/PDF); no programmatic API","p":"n/a","b":"HHS grant award transactions by recipient, program, district","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"IATI Datastore API","u":"https://iatistandard.org/en/iati-tools-and-resources/iati-datastore/how-to-use-the-datastore-api/","co":"Iatistandard","f":"Free w/ account + subscription key","p":"n/a","b":"International development & humanitarian aid funding flows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NHMRC / ARC Research Activities API (Research Data Australia)","u":"https://documentation.ardc.edu.au/rda/research-activities-api","co":"Ardc","f":"Free w/ registration (free API key); datasets also downloadable","p":"n/a","b":"Australian NHMRC & ARC research grants and projects","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NIH ExPORTER (Bulk RePORTER Data)","u":"https://reporter.nih.gov/exporter","co":"NIH RePORTER","f":"Free, keyless bulk CSV/XML downloads","p":"n/a","b":"Bulk historical NIH grant projects, abstracts, publications, patents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIH RePORTER API (v2)","u":"https://api.reporter.nih.gov/","co":"NIH RePORTER","f":"Free, keyless (~1 req/sec recommended)","p":"n/a","b":"US NIH/HHS biomedical grant projects, PIs, funding, publications","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NSF Award Search Web API","u":"https://resources.research.gov/common/webapi/awardapisearch-v1.htm","co":"Research","f":"Free, keyless (JSON/XML)","p":"n/a","b":"US NSF research awards, abstracts, PIs, institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAIRE Graph API (Projects & Funding)","u":"https://graph.openaire.eu/docs/apis/home/","co":"OpenAIRE","f":"Free; personal access token for higher rate limits","p":"n/a","b":"EU + international projects linked to funding and outputs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"OpenAlex API (Funders & Awards)","u":"https://docs.openalex.org/api-entities/funders","co":"OpenAlex","f":"Free, keyless (polite pool w/ email); full data dump","p":"OpenAlex Premium for SLA/faster updates","b":"Funders, grants/awards linked to scholarly works at scale","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ProPublica Nonprofit Explorer API","u":"https://projects.propublica.org/nonprofits/api","co":"Propublica","f":"Free, keyless (JSON)","p":"n/a","b":"US foundation/nonprofit IRS 990 financials, grants made, officers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ROR (Research Organization Registry) API","u":"https://ror.readme.io/docs/rest-api","co":"Readme","f":"Free, keyless (CC0, REST + data dump)","p":"n/a","b":"Persistent IDs for funding & research orgs (Funder Registry successor)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SAM.gov Assistance Listings / Opportunities API","u":"https://open.gsa.gov/api/assistance-listings-api/","co":"U.S. GSA","f":"Free w/ key (rate-limited by account type)","p":"n/a","b":"US federal assistance listings (CFDA) and opportunities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SBIR.gov Awards & Solicitations API","u":"https://www.sbir.gov/api","co":"Sbir","f":"Free, keyless (100 rows/req default)","p":"n/a","b":"US SBIR/STTR awards, solicitations, awarded firms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UKRI Gateway to Research (GtR) API","u":"https://gtr.ukri.org/resources/gtrapi2.html","co":"Ukri","f":"Free, keyless (JSON/XML, OGL)","p":"n/a","b":"UK publicly funded research projects, people, orgs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USAspending API","u":"https://api.usaspending.gov/","co":"USAspending","f":"Free, keyless","p":"n/a","b":"US federal financial assistance/grant awards by agency, recipient","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"History & Digital humanities","count":32,"entries":[{"n":"Archives Portal Europe API","u":"https://www.archivesportaleurope.net/tools/for-content-providers/","co":"Archivesportaleurope","f":"Free w/ key (CC0 data; key from registered account)","p":"n/a","b":"Largest aggregated European archival finding aids","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Chronicling America (Library of Congress)","u":"https://www.loc.gov/apis/additional-apis/chronicling-america-api/","co":"Loc","f":"Free, keyless","p":"n/a","b":"US historic newspapers full-text & OCR, 1690s-present","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Cooper Hewitt Collections API (Smithsonian Design)","u":"https://collection.cooperhewitt.org/api","co":"Cooperhewitt","f":"Free w/ key","p":"n/a","b":"215k+ design objects, rich collection metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Deutsche Digitale Bibliothek (DDB) API","u":"https://api.deutsche-digitale-bibliothek.de/OpenAPI","co":"Deutsche digitale bibliothek","f":"Free w/ key (CC0 metadata)","p":"n/a","b":"German cultural heritage: books, archives, museum objects","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Digital Bodleian / Oxford IIIF (added in verify)","u":"https://iiif.bodleian.ox.ac.uk/iiif/","co":"Ox","f":"Free, keyless (IIIF Presentation/Image API)","p":"n/a","b":"Digitized Bodleian manuscripts & rare books via IIIF","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DigitalNZ API (National Library of New Zealand)","u":"https://digitalnz.org/developers","co":"Digitalnz","f":"Free w/ key","p":"n/a","b":"30M+ NZ heritage items, newspapers, images, docs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DPLA API (Digital Public Library of America)","u":"https://pro.dp.la/developers/api-codex","co":"Dp","f":"Free w/ key (JSON-LD)","p":"n/a","b":"Aggregated US digital library items & collections","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Europeana APIs (Search, Record, IIIF, Newspapers Fulltext)","u":"https://pro.europeana.eu/page/apis","co":"Europeana","f":"Free w/ key","p":"n/a","b":"Pan-European cultural heritage + newspaper OCR full text","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Gallica / BnF APIs (IIIF, Search SRU, Document)","u":"https://api.bnf.fr/","co":"Bnf","f":"Free, keyless (open access, no abuse)","p":"n/a","b":"French national digital library, manuscripts, newspapers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Getty Vocabularies LOD (AAT, ULAN, TGN)","u":"https://www.getty.edu/research/tools/vocabularies/lod/","co":"Getty","f":"Free, keyless (SPARQL, JSON/RDF, reconciliation)","p":"n/a","b":"Art/architecture terms, artist names, geographic authorities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Gutendex (Project Gutenberg metadata API)","u":"https://gutendex.com/","co":"Gutendex","f":"Free, keyless, no known rate limit","p":"n/a","b":"70k+ public-domain ebooks metadata & download links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Harvard Art Museums API","u":"https://harvardartmuseums.org/collections/api","co":"Harvardartmuseums","f":"Free w/ key","p":"n/a","b":"200k+ artworks with exhibition/publication metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"HathiTrust Bibliographic + Data API","u":"https://www.hathitrust.org/member-libraries/resources-for-librarians/data-resources/bibliographic-api/","co":"Hathitrust","f":"Free, keyless (bib API); Data API needs OAuth/membership","p":"n/a","b":"Mass-digitized books bib/rights, MARC, page access","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Internet Archive APIs (archive.org)","u":"https://archive.org/developers/","co":"Archive","f":"Free, keyless (metadata/search); S3-style keys for writes","p":"n/a","b":"Digitized books, texts, OCR, audio, web archive items","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Library of Congress Linked Data Service (id.loc.gov)","u":"https://id.loc.gov/","co":"Loc","f":"Free, keyless (SRU, OpenSearch, RDF, suggest)","p":"n/a","b":"LCSH subject headings & name/vocabulary authorities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"loc.gov JSON API (Library of Congress)","u":"https://www.loc.gov/apis/","co":"Loc","f":"Free, keyless (JSON/YAML, IIIF, full text)","p":"n/a","b":"LoC digital collections, items, text & image services","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"National Archives Catalog API (NARA, US)","u":"https://www.archives.gov/research/catalog/help/api","co":"Archives","f":"Free w/ key, 10k queries/mo","p":"n/a","b":"US federal archival descriptions, OCR text, digital objects","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nomisma.org SPARQL/RDF API (added in verify)","u":"https://nomisma.org/","co":"Nomisma","f":"Free, keyless (SPARQL, RDF, JSON-LD)","p":"n/a","b":"Linked-data ancient numismatics concepts and coin data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Library API (Internet Archive)","u":"https://openlibrary.org/developers/api","co":"Openlibrary","f":"Free, keyless","p":"n/a","b":"Book bibliographic data, editions, covers, read links","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Papyri.info API (added in verify)","u":"https://papyri.info/docs/api","co":"Papyri","f":"Free, keyless (open data, EpiDoc/RDF)","p":"n/a","b":"Aggregated Greek/Latin/Coptic documentary papyri texts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PeriodO (period definitions gazetteer)","u":"https://perio.do/","co":"Perio","f":"Free, keyless, public domain dataset","p":"n/a","b":"Linking scholarly historical/archaeological period definitions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Pleiades (ancient world gazetteer)","u":"https://pleiades.stoa.org/","co":"Stoa","f":"Free, keyless (open data dumps + JSON)","p":"n/a","b":"Stable IDs for Greek/Roman/Mediterranean ancient places","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Rijksmuseum API (added in verify)","u":"https://data.rijksmuseum.nl/docs/","co":"Rijksmuseum","f":"Free w/ key","p":"n/a","b":"Dutch national museum artworks & historical object metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Scaife Viewer / Perseus (Open Greek & Latin) API","u":"https://scaife.perseus.org/","co":"Perseus","f":"Free, keyless (CTS/Nautilus + GraphQL, MIT-licensed data)","p":"n/a","b":"Classical Greek/Latin texts with linguistic annotation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Smithsonian Open Access API","u":"https://www.si.edu/openaccess/devtools","co":"Si","f":"Free w/ key (via api.data.gov), CC0 data","p":"n/a","b":"5M+ CC0 museum/archive objects across 21 museums","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Trove API (National Library of Australia)","u":"https://trove.nla.gov.au/about/create-something/using-api","co":"Nla","f":"Free w/ key (personal); commercial needs approval","p":"n/a","b":"Australian historic newspapers, gazettes, archives","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"VIAF (Virtual International Authority File, OCLC)","u":"https://viaf.org/","co":"Viaf","f":"Free, keyless query (JSON/RDF/MARC-XML via content negotiation)","p":"n/a","b":"Cross-walking author/name authority records globally","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wayback Machine APIs (CDX + Memento, Internet Archive)","u":"https://archive.org/help/wayback_api.php","co":"Archive","f":"Free, keyless","p":"n/a","b":"Historical web archive snapshots, CDX capture index","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wikidata Query Service (SPARQL) & API","u":"https://www.wikidata.org/wiki/Wikidata:Data_access","co":"Wikimedia","f":"Free, keyless (60s query deadline)","p":"n/a","b":"Linked open data for people, places, events, dates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikipedia / MediaWiki REST API","u":"https://www.mediawiki.org/wiki/API:REST_API","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Encyclopedic & historical reference content/extracts","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikisource / MediaWiki API","u":"https://www.mediawiki.org/wiki/API:Main_page","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Crowd-transcribed public-domain & historical source texts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Historical Gazetteer (WHG) API","u":"https://whgazetteer.org/public_data/","co":"Whgazetteer","f":"Free, keyless (Index/Database + Reconciliation APIs)","p":"n/a","b":"Millions of historical toponyms linked across time/language","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Hospitality, Hotels & Restaurants","count":28,"entries":[{"n":"AirROI Airbnb Data API","u":"https://www.airroi.com/api","co":"Airroi","f":"$10 starter credits on signup; free no-account analytics tools","p":"Pay-as-you-go from $0.01/call, no monthly minimum","b":"Short-term rental market + occupancy data, 190+ countries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Amadeus for Developers (Hotel Search & Booking)","u":"https://developers.amadeus.com/self-service/category/hotels","co":"Amadeus","f":"Free Self-Service test env w/ key; quota cap","p":"Pay-as-you-go in production","b":"Hotel search, pricing, and booking at scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Booking.com Demand API","u":"https://developers.booking.com/demand","co":"Booking","f":"Free for approved affiliate partners (registration may be limited)","p":"n/a (commission-based)","b":"Hotel availability/booking for affiliates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DataSF - Restaurant Scores (LIVES Standard)","u":"https://data.sfgov.org/Health-and-Social-Services/Restaurant-Scores-LIVES-Standard/pyih-qa8i","co":"Sfgov","f":"Free, keyless Socrata SODA API","p":"n/a","b":"San Francisco restaurant inspection scores","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Foursquare Places API","u":"https://foursquare.com/products/places-api/","co":"Foursquare","f":"Free w/ key; 500 free Pro calls/mo (effective Jun 1 2026, down from 10k)","p":"Pay-as-you-go (~$15 CPM Pro, $18.75 CPM Premium)","b":"Restaurant/venue POI search, tips, photos","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Geoapify Places API","u":"https://www.geoapify.com/places-api/","co":"Geoapify","f":"Free w/ key, 3,000 req/day, no card","p":"$59/mo","b":"Restaurant/hotel POI search via OSM data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Places API (Maps Platform)","u":"https://developers.google.com/maps/documentation/places/web-service/overview","co":"Google","f":"Free monthly per-SKU usage caps","p":"Pay-as-you-go (~$17-32 per 1k)","b":"Restaurant/hotel details, reviews, place search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hotelbeds (HBX Group) APIs","u":"https://developer.hotelbeds.com/documentation/hotels/booking-api/","co":"Hotelbeds","f":"Free test environment for registered devs","p":"Partner contract / per booking","b":"Wholesale hotel content, availability, booking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hotellook / Travelpayouts Hotel Data API","u":"https://support.travelpayouts.com/hc/en-us/articles/115000150945-Hotel-data-API","co":"Travelpayouts","f":"Free w/ token via Travelpayouts affiliate signup","p":"n/a (commission/affiliate based)","b":"Hotel search, prices, photos for affiliate sites","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LiteAPI (Nuitee)","u":"https://liteapi.travel/","co":"Liteapi","f":"Free sandbox key, no card; core booking endpoints free","p":"Commission/markup per booking (no monthly fee)","b":"Hotel search, rates and booking, 2M+ hotels","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Makcorps Hotel Price API","u":"https://www.makcorps.com/","co":"Makcorps","f":"Free 30 trial API calls, no card","p":"Paid plans (subscription)","b":"Hotel price comparison across 200+ OTAs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NYC Open Data - DOHMH Restaurant Inspections (Socrata)","u":"https://data.cityofnewyork.us/Health/DOHMH-New-York-City-Restaurant-Inspection-Results/43nn-pn8j","co":"Cityofnewyork","f":"Free, keyless; higher limits w/ app token","p":"n/a","b":"NYC restaurant health grades and violations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Brewery DB","u":"https://www.openbrewerydb.org/","co":"Openbrewerydb","f":"Free, keyless; open brewery/taproom directory","p":"n/a","b":"Brewery, brewpub and taproom location data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenStreetMap Overpass API","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless; fair-use rate limits per IP","p":"n/a (self-host for volume)","b":"Querying restaurants/hotels/cafes POIs globally","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Sabre Hospitality / SynXis APIs","u":"https://developer.sabre.com/","co":"Sabre","f":"Free dev sandbox w/ registration","p":"Partner/commercial contract","b":"Hotel CRS, availability, rates, GDS booking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Spoonacular API","u":"https://spoonacular.com/food-api","co":"Spoonacular","f":"Free w/ key, 150 points/day","p":"~$29/mo","b":"Chain restaurant menu items + nutrition data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TheMealDB","u":"https://www.themealdb.com/api.php","co":"Themealdb","f":"Free, keyless (test key '1'); JSON recipe/menu DB","p":"$3/mo Patreon supporter key","b":"Free recipe/menu/dish data for food apps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Toast Platform API","u":"https://doc.toasttab.com/doc/devguide/apiOverview.html","co":"Toasttab","f":"Free dev access for partner program members","p":"Partner program / per-integration","b":"Restaurant POS orders, menus, payments","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TripAdvisor Content API","u":"https://www.tripadvisor.com/developers","co":"Tripadvisor","f":"Free w/ key, first 5,000 calls/mo (card req)","p":"Pay-as-you-go after free tier","b":"Hotel/restaurant ratings, reviews, locations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wikidata Query Service (SPARQL)","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless SPARQL endpoint","p":"n/a","b":"Hotel chains, restaurant entities, lodging metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Yelp Fusion API","u":"https://docs.developer.yelp.com/docs/fusion-intro","co":"Yelp","f":"30-day trial w/ daily quota cap; no perpetual free tier","p":"~$7.99 per 1,000 calls (Starter)","b":"Restaurant/business listings, reviews, ratings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Yelp LIVES (Local Inspector Value-Entry Spec)","u":"https://www.yelp.com/healthscores","co":"Yelp","f":"Free open data standard / feed format","p":"n/a","b":"Municipal restaurant inspection feed standard","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"AirDNA API","u":"https://apidocs.airdna.co/","co":"Airdna","f":"none (enterprise sales only)","p":"Enterprise (reported $2k-5k+/mo)","b":"Short-term rental occupancy/ADR/RevPAR analytics","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Olo / Omnivore POS API","u":"https://www.olo.com/omnivoreapi","co":"Olo","f":"none (commercial partner access)","p":"Commercial contract","b":"Restaurant digital ordering + POS integration","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"OpenTable API","u":"https://dev.opentable.com/","co":"Opentable","f":"none (affiliate/partner approval required)","p":"Partner agreement","b":"Restaurant reservations and availability","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"RateHawk / ETG (Emerging Travel Group) API","u":"https://www.ratehawk.com/lp/en-us/API/","co":"Ratehawk","f":"none (partner approval required)","p":"Net/commission/affiliate per booking","b":"B2B hotel content + booking, 2.9M hotels","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Resy API","u":"https://resy.com/","co":"Resy","f":"none (partner/restaurant access)","p":"Platform/partner agreement","b":"Restaurant reservations, waitlist, availability","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"SevenRooms API","u":"https://sevenrooms.com/platform/integrations-apis/","co":"Sevenrooms","f":"none (partner/customer access)","p":"Platform subscription","b":"Restaurant reservations, guest/CRM data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Identity, standards bodies & registries","count":1,"entries":[{"n":"Crossref REST API","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless (polite pool w/ email)","p":"n/a","b":"DOI metadata, citations, scholarly works lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Insurance & Actuarial","count":28,"entries":[{"n":"AM Best — Best's Credit Ratings / State Rate Filings","u":"https://web.ambest.com/home","co":"Ambest","f":"Free ratings lookup w/ registration","p":"Subscription for filings/data products","b":"Insurer financial strength ratings & rate filings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"California Dept. of Insurance — Data & Reports","u":"https://www.insurance.ca.gov/0250-insurers/0600-data-reports/","co":"Ca","f":"Free, keyless (downloadable datasets/reports)","p":"n/a","b":"CA insurer complaint, rate & market data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Canopy Connect (insurance data intake API)","u":"https://www.usecanopy.com/api","co":"Usecanopy","f":"Free developer/sandbox tier","p":"Paid plans (volume-based, contact sales)","b":"Pulling real-time P&C policy data from carriers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CDC NCHS — United States Life Tables","u":"https://www.cdc.gov/nchs/products/life_tables.htm","co":"U.S. CDC","f":"Free, keyless (published tables + NCHS data APIs)","p":"n/a","b":"Official US period & cohort life tables by age/sex/race","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CDC WONDER — Mortality / Cause of Death","u":"https://wonder.cdc.gov/","co":"U.S. CDC","f":"Free, keyless (XML query API + web UI)","p":"n/a","b":"US underlying/multiple cause of death, life tables","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CMS Marketplace API (Healthcare.gov)","u":"https://developer.cms.gov/marketplace-api/","co":"Cms","f":"Free w/ key (rotating API key)","p":"n/a","b":"ACA health plans, premiums, eligibility, plan compare","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CMS QHP Provider & Formulary Machine-Readable Data","u":"https://github.com/CMSgov/QHP-provider-formulary-APIs","co":"CMSgov","f":"Free, keyless (carrier-hosted JSON files)","p":"n/a","b":"Marketplace plan provider networks and drug formularies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Data.gov insurance dataset catalog","u":"https://catalog.data.gov/dataset?tags=insurance","co":"Data.gov","f":"Free, keyless (CKAN API + bulk files)","p":"n/a","b":"Federal & state insurance datasets discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EIOPA Insurance Statistics (EU)","u":"https://www.eiopa.europa.eu/tools-and-data/insurance-statistics_en","co":"European Union","f":"Free, keyless (downloadable datasets, Solvency II)","p":"n/a","b":"EU insurer solvency, premiums & risk-free rate curves","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FEMA National Risk Index (OpenFEMA)","u":"https://www.fema.gov/about/openfema/data-sets/national-risk-index-data","co":"Fema","f":"Free, keyless (OpenFEMA API + bulk download)","p":"n/a","b":"Expected annual loss for 18 natural hazards by tract/county","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FEMA OpenFEMA — NFIP Redacted Claims & Policies","u":"https://www.fema.gov/about/openfema/data-sets","co":"Fema","f":"Free, keyless (REST API + bulk CSV/JSON)","p":"n/a","b":"National flood insurance claims & policy transactions 1978-present","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Human Mortality Database (mortality.org)","u":"https://www.mortality.org/","co":"Mortality","f":"Free w/ registration (zipped data + R/Python clients)","p":"n/a","b":"Harmonized national life tables & death rates, longevity research","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IRS Actuarial Tables (Section 7520)","u":"https://www.irs.gov/retirement-plans/actuarial-tables","co":"IRS","f":"Free, keyless (published tables / PDFs, Table 2010CM)","p":"n/a","b":"Life estate, remainder & annuity valuation factors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ladder Life term life API","u":"https://ladderlife.github.io/api/","co":"Ladderlife","f":"Free w/ partner approval","p":"n/a (partner/affiliate model)","b":"Embeddable term life quote-to-bind in a few lines","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lemonade Insurance API","u":"https://www.lemonade.com/api","co":"Lemonade","f":"Free w/ partner approval (request-access)","p":"n/a (revenue-share partner model)","b":"Embedded renters/home/condo quoting & policy issuance","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NAIC Consumer Information Source (CIS)","u":"https://content.naic.org/cis_consumer_information.htm","co":"Naic","f":"Free, keyless (web lookup, no registration)","p":"n/a","b":"Insurer licensing & consumer complaint ratios by company","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NAIC Financial Data Repository (INSDATA)","u":"https://content.naic.org/insurance-topics/financial-data-repository","co":"Naic","f":"Limited free; bulk products paid","p":"Paid data products (state regulators / academics)","b":"Statutory annual/quarterly insurer financial statements","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NAIC SERFF Filing Access (SFA)","u":"https://portals.naic.org/serff-filing-access","co":"Naic","f":"Free, keyless public filing search","p":"n/a","b":"Public insurance rate & form filings across states","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Oasis Loss Modelling Framework","u":"https://oasislmf.org/","co":"Oasislmf","f":"Free, open-source (self-hosted platform + REST API)","p":"n/a","b":"Open catastrophe model execution & loss simulation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OECD Insurance Statistics (OECD.Stat API)","u":"https://stats.oecd.org/","co":"OECD","f":"Free, keyless (SDMX-JSON API + bulk)","p":"n/a","b":"Cross-country premiums, penetration, density, claims ratios","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SOA Mortality and Other Rate Tables (mort.soa.org)","u":"https://mort.soa.org/","co":"Soa","f":"Free, keyless (XML/XTbML + CSV download, 2,500+ tables)","p":"n/a","b":"Actuarial mortality, lapse and valuation rate tables","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"U.S. Census SAHIE — Health Insurance Estimates","u":"https://www.census.gov/programs-surveys/sahie.html","co":"U.S. Census Bureau","f":"Free w/ key (Census Data API)","p":"n/a","b":"Small-area health insurance coverage estimates by county","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USGS Earthquake / Seismic Web Services","u":"https://earthquake.usgs.gov/fdsnws/event/1/","co":"USGS","f":"Free, keyless (FDSN event API + hazard design web services)","p":"n/a","b":"Seismic catalog & ground-motion inputs for cat risk","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO Global Health Observatory (GHO) OData API","u":"https://www.who.int/data/gho/info/gho-odata-api","co":"WHO","f":"Free, keyless (OData JSON API)","p":"n/a","b":"Global mortality & cause-of-death indicators by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Bindable insurance API","u":"https://api.bindable.com/","co":"Bindable","f":"none (partner onboarding, OAuth credentials issued)","p":"Contact sales / partner agreement","b":"Multi-carrier auto/home/renters embedded quoting","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"COMPULIFE Life Insurance Quote API","u":"https://compulife.com/api/","co":"Compulife","f":"none (2-month free trial only)","p":"~$480/yr (1,200 quotes/mo tier; up to $1,500/yr)","b":"Multi-carrier term life insurance quote comparison","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Hexure Life Quotes API","u":"https://hexure.com/life-quotes-api/","co":"Hexure","f":"none","p":"Contact sales (subscription)","b":"Life insurance quoting across carriers & rate classes","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Verisk API Catalog (ISO underwriting/risk)","u":"https://apicatalog.verisk.com/","co":"Verisk","f":"none (licensed)","p":"Contact sales / licensed access","b":"ISO property territory, risk analyzer & underwriting data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Law & Legal studies","count":25,"entries":[{"n":"BAILII (British and Irish Legal Information Institute)","u":"https://www.bailii.org/","co":"Bailii","f":"Free web access; UK & Irish case law and legislation (no formal API)","p":"n/a","b":"UK/Ireland case law and legislation, free access","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CanLII API (Canada)","u":"https://github.com/canlii/API_documentation/blob/master/EN.md","co":"Canlii","f":"Free key for research/non-commercial; case & legislation metadata","p":"n/a (commercial by arrangement)","b":"Canadian case law, statutes, regulations metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Caselaw Access Project (CAP / case.law)","u":"https://case.law/","co":"Case","f":"Free, CC0; full US case law corpus (6.7M cases) via bulk downloads / static files","p":"n/a","b":"Bulk historical US published case law, 360 yrs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Congress.gov API (Library of Congress)","u":"https://api.congress.gov/","co":"Library of Congress","f":"Free w/ api.data.gov key; 5,000 req/hr (DEMO_KEY 30/hr)","p":"n/a","b":"US federal bills, laws, members, committees","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Cornell Legal Information Institute (LII)","u":"https://www.law.cornell.edu/","co":"Cornell","f":"Free web access; US Code, CFR, SCOTUS (no formal public API)","p":"n/a","b":"Annotated US Code, CFR, legal reference","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CourtListener (Free Law Project)","u":"https://www.courtlistener.com/help/api/rest/","co":"Courtlistener","f":"Free w/ key; many endpoints open, throttled default rate, full access via membership","p":"Membership / commercial agreement (donation-based)","b":"US federal & state case law, opinions, oral arguments","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CourtListener Citation Lookup & Verification API","u":"https://www.courtlistener.com/help/api/rest/citation-lookup/","co":"Courtlistener","f":"Free w/ key; throttled to 60 valid citations/minute","p":"n/a (membership for higher limits)","b":"Verify/extract legal citations, anti-hallucination guardrail","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CourtListener Judge & Financial Disclosures APIs","u":"https://www.courtlistener.com/help/api/rest/financial-disclosures/","co":"Courtlistener","f":"Free w/ key; 16k+ judges, 32k+ disclosure forms; bulk CSV available","p":"n/a (membership)","b":"Judicial analytics, judge bios, financial disclosures","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"eCFR API (Electronic Code of Federal Regulations)","u":"https://www.ecfr.gov/developers/documentation/api/v1","co":"Ecfr","f":"Free, keyless; full CFR text, structure, historical search","p":"n/a","b":"Current & historical federal regulations text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EUR-Lex / CELLAR (EU Publications Office)","u":"https://eur-lex.europa.eu/eli-register/technical_information.html","co":"European Union","f":"Free, keyless SPARQL + REST; 2.7M+ EU law works as RDF","p":"n/a","b":"EU treaties, regulations, directives, CJEU judgments","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Federal Register API","u":"https://www.federalregister.gov/developers/documentation/api/v1","co":"Federal Register","f":"Free, keyless; documents since 1994, JSON/CSV","p":"n/a","b":"Federal rules, proposed rules, notices, executive orders","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"govinfo API (US GPO)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Free w/ api.data.gov key; US Code, CFR, bills, Statutes at Large, court opinions","p":"n/a","b":"Authoritative federal publications across 3 branches","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GPO Bulk Data Repository (govinfo)","u":"https://www.govinfo.gov/bulkdata/","co":"GPO","f":"Free, keyless; bulk XML for CFR, bills, Federal Register, statutes","p":"n/a","b":"Bulk structured XML of US law & regulations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Harvard Caselaw Access Project dataset (HuggingFace)","u":"https://huggingface.co/datasets/free-law/Caselaw_Access_Project","co":"Hugging Face","f":"Free, CC0; full 6.7M-case CAP corpus + FAISS index for download","p":"n/a","b":"ML-ready bulk US case law corpus download","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Indian Kanoon API","u":"https://api.indiankanoon.org/documentation/","co":"Indiankanoon","f":"Free Rs 500 trial credit; Rs 10,000/mo free for verified non-commercial use; otherwise prepaid per-call","p":"Prepaid per-query pricing (low per-document cost)","b":"Indian Supreme Court, High Courts, statutes search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LegiScan API","u":"https://legiscan.com/legiscan","co":"Legiscan","f":"Free public tier; 30,000 queries/month, all 50 states + Congress","p":"Paid subscription tiers (100k-250k queries/mo)","b":"National state + federal bill tracking, roll calls","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Legislation.gov.uk API (UK National Archives)","u":"https://www.legislation.gov.uk/developer","co":"UK Government","f":"Free, keyless; UK Acts (1267-), SIs; HTML/XML/RDF under OGL","p":"n/a","b":"UK primary & secondary legislation, point-in-time","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open States API v3 (Plural)","u":"https://docs.openstates.org/api-v3/","co":"Openstates","f":"Free w/ key; 50 states + DC + PR bills, votes, legislators; bulk downloads","p":"n/a (commercial via Plural)","b":"US state legislation, bills, legislators, votes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenCorporates API","u":"https://api.opencorporates.com/","co":"Opencorporates","f":"Permitted-user free access (journalists/NGOs/academic); 235M companies","p":"~GBP 2,250/yr Essentials for commercial API","b":"Global company/legal entity registry data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenSanctions API","u":"https://www.opensanctions.org/api/","co":"Opensanctions","f":"Free for non-commercial; free keys for journalists/NGOs; 300+ sources","p":"Pay-as-you-go API / data license for commercial","b":"Sanctions, PEP, watchlist screening for compliance","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Oyez API (US Supreme Court)","u":"https://api.oyez.org/","co":"Oyez","f":"Free, keyless (undocumented public API); cases, oral argument audio & transcripts","p":"n/a","b":"SCOTUS cases, oral arguments, audio transcripts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RECAP Archive / PACER Data APIs (CourtListener)","u":"https://www.courtlistener.com/help/api/rest/recap/","co":"Courtlistener","f":"Free w/ key; hundreds of millions of PACER docket items searchable","p":"Commercial bulk agreements available","b":"Federal court dockets, filings, parties from PACER","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"U.S. Supreme Court Opinions & data (supremecourt.gov)","u":"https://www.supremecourt.gov/opinions/opinions.aspx","co":"Supremecourt","f":"Free, keyless; slip/bound opinions, orders, dockets, argument calendars (PDF/HTML)","p":"n/a","b":"Authoritative SCOTUS opinions, orders, docket data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USPTO Open Data Portal (data.uspto.gov / PatentsView)","u":"https://data.uspto.gov/","co":"USPTO","f":"Free; patents, office actions, trademarks. PatentsView search API free/keyless; legacy site migrating to ODP in 2026","p":"n/a","b":"US patents & trademarks, IP legal data","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"USPTO TSDR API (Trademark Status & Document Retrieval)","u":"https://developer.uspto.gov/api-catalog","co":"USPTO","f":"Free w/ key; real-time trademark status & file wrapper","p":"n/a","b":"US trademark application/registration status","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"}]},{"category":"Linguistics & Languages","count":29,"entries":[{"n":"Ancient Greek WordNet API","u":"https://greekwordnet.chs.harvard.edu/api","co":"Harvard","f":"Free, keyless (RESTful JSON)","p":"n/a","b":"Ancient Greek synsets and semantic relations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CMU Pronouncing Dictionary (CMUdict)","u":"http://www.speech.cs.cmu.edu/cgi-bin/cmudict","co":"Cmu","f":"Free, keyless (web lookup + open dataset)","p":"n/a","b":"English ARPAbet phoneme pronunciations, 134k+ words","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ConceptNet 5 API","u":"https://conceptnet.io/","co":"Conceptnet","f":"Free, keyless (3600 req/hr)","p":"n/a","b":"Multilingual semantic network / commonsense word relations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Datamuse API","u":"https://www.datamuse.com/api/","co":"Datamuse","f":"Free, keyless (100k req/day no-key)","p":"n/a (contact for >100k/day)","b":"Word-finding: rhymes, sounds-like, means-like, related","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DGT Translation Memory (EU JRC)","u":"https://joint-research-centre.ec.europa.eu/language-technology-resources/dgt-translation-memory_en","co":"European Commission","f":"Free, keyless (bulk TMX downloads)","p":"n/a","b":"EU legislation translation memory, 24 languages, TMX","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Easy Pronunciation IPA API","u":"https://easypronunciation.com/en/ipa-phonetic-converter-rest-api","co":"Easypronunciation","f":"Free trial credits; otherwise paid","p":"Paid credit packs","b":"Text-to-IPA phonetic transcription, many languages","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"eSpeak NG","u":"https://github.com/espeak-ng/espeak-ng","co":"Espeak ng","f":"Free, open-source (self-hosted library/CLI)","p":"n/a","b":"Text-to-speech + IPA phoneme output for 100+ languages","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Forvo Pronunciation API","u":"https://api.forvo.com/","co":"Forvo","f":"Free w/ key (limited daily requests)","p":"Paid plans for higher volume","b":"Crowd-sourced native word pronunciation audio, many languages","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Free Dictionary API (dictionaryapi.dev)","u":"https://dictionaryapi.dev/","co":"Dictionaryapi","f":"Free, keyless","p":"n/a","b":"English word definitions, phonetics, audio, synonyms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Glottolog REST/resourcemap API","u":"https://glottolog.org/","co":"Glottolog","f":"Free, keyless (resourcemap.json, downloads, CLDF)","p":"n/a","b":"Languoid catalog, glottocodes, ISO 639-3 mappings","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ISO 639-3 Code Tables (SIL)","u":"https://iso639-3.sil.org/code_tables/639/data","co":"Sil","f":"Free, keyless (downloadable code tables)","p":"n/a","b":"Authoritative ISO 639-3 language code dataset","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Latin WordNet API (Univ. of Exeter)","u":"https://latinwordnet.exeter.ac.uk/api","co":"Exeter","f":"Free, keyless (RESTful JSON)","p":"n/a","b":"Latin lexical/semantic relations, synsets, lemmas","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Lexvo.org","u":"http://www.lexvo.org/linkeddata/resources.html","co":"Lexvo","f":"Free, keyless (RDF dumps + SPARQL/LOD)","p":"n/a","b":"Global URIs for languages, ISO 639 mappings, linked data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Library of Congress ISO 639-2 Code List","u":"https://www.loc.gov/standards/iso639-2/php/code_list.php","co":"Loc","f":"Free, keyless (published code list)","p":"n/a","b":"ISO 639-2 bibliographic/terminologic language codes","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LibreTranslate","u":"https://libretranslate.com/","co":"Libretranslate","f":"Free self-hosted; public demo keyless rate-limited","p":"~$9/mo hosted plan","b":"Open-source translation + language detection, self-hostable","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ModernMT API","u":"https://www.modernmt.com/api","co":"Modernmt","f":"Free trial credits","p":"Pay-per-character paid plans","b":"Adaptive neural MT with translation-memory context","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MyMemory Translation Memory API","u":"https://mymemory.translated.net/doc/spec.php","co":"Translated","f":"Free, keyless (1000 words/day; 50k/day w/ email)","p":"n/a (free anonymous + email tiers)","b":"Translation memory search + MT fallback, TMX export","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Multilingual Wordnet (OMW)","u":"https://omwn.org/","co":"Omwn","f":"Free, keyless (downloads + web lookup)","p":"n/a","b":"WordNets for 30+ languages linked to Princeton synsets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OPUS Open Parallel Corpus","u":"https://opus.nlpl.eu/","co":"Nlpl","f":"Free, keyless (downloads + OPUS-API)","p":"n/a","b":"Parallel bitexts/TMX for 1000+ languages, MT training","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PanLex API","u":"https://dev.panlex.org/api/","co":"Panlex","f":"Free, keyless (api.panlex.org/v2)","p":"n/a","b":"Panlingual lexical translation across 9000+ language varieties","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Princeton WordNet (WordNet Web / wn dict)","u":"https://wordnet.princeton.edu/","co":"Princeton","f":"Free, keyless (downloadable DB + online lookup)","p":"n/a","b":"Foundational English lexical database: synsets, hypernyms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sanskrit WordNet API (CHS Harvard)","u":"https://sanskritwordnet.chs.harvard.edu/api","co":"Harvard","f":"Free, keyless (RESTful JSON)","p":"n/a","b":"Sanskrit synsets and lexical-semantic relations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sketch Engine","u":"https://www.sketchengine.eu/","co":"Sketchengine","f":"Free open corpora + 30-day trial; API on paid","p":"~EUR 4.83/mo academic","b":"Corpus query (CQL) over 800+ corpora, word sketches","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tatoeba API + data downloads","u":"https://tatoeba.org/en/downloads","co":"Tatoeba","f":"Free, keyless (API + CC bulk downloads)","p":"n/a","b":"Millions of example sentences with translations, many languages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Unicode CLDR","u":"https://cldr.unicode.org/","co":"Unicode","f":"Free, keyless (JSON/XML locale data downloads)","p":"n/a","b":"Locale data: language/region names, number/date formats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Universal Dependencies","u":"https://universaldependencies.org/","co":"Universaldependencies","f":"Free, keyless (CoNLL-U treebank downloads)","p":"n/a","b":"Cross-linguistic syntactic treebanks, 100+ languages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wikidata Lexicographical Data (Lexemes, SPARQL)","u":"https://www.wikidata.org/wiki/Wikidata:Lexicographical_data/Documentation","co":"Wikimedia","f":"Free, keyless (SPARQL endpoint + REST)","p":"n/a","b":"Multilingual lexemes, forms, senses; Ontolex-Lemon RDF","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wiktionary REST API (MediaWiki)","u":"https://en.wiktionary.org/api/rest_v1/","co":"Wiktionary","f":"Free, keyless","p":"n/a","b":"Wiktionary definitions/content across language editions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wordnik API","u":"https://developer.wordnik.com/","co":"Wordnik","f":"Free w/ key (generous free tier)","p":"Paid plans for higher volume","b":"Multi-source English definitions, examples, pronunciations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"LLM gateways & routing","count":28,"entries":[{"n":"Apache APISIX AI Gateway","u":"https://apisix.apache.org/ai-gateway/","co":"Apache","f":"Free, fully open-source (Apache-2.0); ai-proxy / ai-proxy-multi plugins","p":"n/a (API7 commercial support available)","b":"Open-source API gateway with LLM load balancing & fallback","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Azure API Management (AI Gateway capabilities)","u":"https://learn.microsoft.com/azure/api-management/genai-gateway-capabilities","co":"Microsoft","f":"Consumption tier free grant; APIM-based AI gateway features","p":"APIM tier pricing + model usage","b":"Enterprise APIM unified OpenAI-format model gateway","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Bifrost (Maxim AI)","u":"https://github.com/maximhq/bifrost","co":"Maximhq","f":"Free, open-source (Apache-2.0); self-host, 1000+ models, ~11us overhead","p":"Maxim enterprise plans (custom)","b":"Ultra-low-latency Go gateway, failover, semantic caching","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cloudflare AI Gateway","u":"https://developers.cloudflare.com/ai-gateway/","co":"Cloudflare","f":"Free core features (analytics, caching, rate limiting); 100k logs/mo","p":"Workers Paid plan ($5/mo) for 1M logs","b":"Edge gateway with caching, rate limiting, analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DeepInfra","u":"https://deepinfra.com/docs","co":"Deepinfra","f":"Free signup credits; OpenAI-compatible endpoint to open models","p":"Per-token pay-as-you-go (low per-1M rates)","b":"Cheap OpenAI-compatible serverless open-model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Eden AI","u":"https://www.edenai.co/","co":"Edenai","f":"Free credits to start; pay-as-you-go passthrough + platform fee","p":"Pay-as-you-go provider passthrough + platform fee","b":"Multimodal unified API (LLM, STT, OCR, image, translate)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Fireworks AI","u":"https://docs.fireworks.ai/","co":"Fireworks AI","f":"Free signup credits; OpenAI-compatible API","p":"~$0.90 / 1M tokens (70B class)","b":"Fast OpenAI-compatible serverless model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Glama Gateway","u":"https://glama.ai/ai/gateway","co":"Glama","f":"Pay-for-what-you-use at listed prices, no hidden fees (no free credit tier confirmed)","p":"Pay-as-you-go (listed model prices)","b":"OpenAI-compatible load-balanced access to 100+ models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Groq (GroqCloud)","u":"https://console.groq.com/docs","co":"Groq","f":"Free tier with rate-limited keyed access; OpenAI-compatible","p":"~$0.59-$0.79 / 1M tokens (70B class)","b":"Ultra-low-latency LPU inference, OpenAI-compatible","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Helicone","u":"https://docs.helicone.ai/","co":"Helicone","f":"Free, 10k requests/mo; open source","p":"$79/mo Pro","b":"One-line LLM observability proxy + cost tracking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Kong AI Gateway","u":"https://developer.konghq.com/ai-gateway/","co":"Konghq","f":"Free, open-source self-host (AI plugins, multi-LLM routing, semantic caching)","p":"Konnect ~$105/service/mo + usage; Enterprise custom","b":"API-gateway-grade multi-LLM routing & governance","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LangDB AI Gateway","u":"https://github.com/langdb/ai-gateway","co":"Langdb","f":"Free, open-source Rust gateway (Apache-2.0); unified OpenAI-format API to 250+ models","p":"Hosted/enterprise tiers (custom)","b":"Rust-based high-performance gateway + agent observability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LiteLLM (Proxy / AI Gateway)","u":"https://docs.litellm.ai/docs/simple_proxy","co":"Litellm","f":"Free, open-source (MIT); self-host full proxy, virtual keys, budgets, spend tracking","p":"$250/mo Enterprise (SSO, audit logs, JWT, support)","b":"Self-hosted OpenAI-format proxy to 100+ LLMs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LLM Gateway (llmgateway.io)","u":"https://llmgateway.io/","co":"Llmgateway","f":"Free, open-source; BYOK at no markup across 25+ providers / 210+ models","p":"Managed keys: provider rates + 5% platform fee","b":"No-markup unified billing across 25+ providers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MegaLLM","u":"https://megallm.io/","co":"Megallm","f":"Free signup credits ($75); pay-as-you-go, OpenAI-compatible","p":"$10/mo Basic plan","b":"One API for 70+ LLMs, failover, analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ngrok AI Gateway","u":"https://ngrok.com/docs/ai-gateway/","co":"Ngrok","f":"Free tier available; traffic policy-based AI gateway features","p":"ngrok paid plans (usage/seat based)","b":"Ingress-layer AI gateway: routing, auth, rate limits","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenRouter","u":"https://openrouter.ai/docs","co":"OpenRouter","f":"Free w/ key; dozens of :free models (~50/day, 1000/day w/ 10 credits)","p":"Pay-as-you-go provider passthrough + ~5.5% credit fee","b":"Unified single-key access to 300+ models w/ fallbacks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Portkey AI Gateway","u":"https://portkey.ai/docs","co":"Portkey","f":"Free Developer tier; open-source gateway (route 1600+ LLMs, guardrails)","p":"$49/mo Production","b":"Open-source gateway with guardrails, fallbacks, observability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pydantic AI Gateway","u":"https://ai.pydantic.dev/gateway/","co":"Pydantic","f":"Free during open beta; BYOK + built-in providers, cost limits per project/user/key","p":"Pay-for-inference option (custom)","b":"Typed gateway with cost limits + BYOK key management","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Requesty","u":"https://www.requesty.ai/","co":"Requesty","f":"No subscription/seat fees; all features included, 5% markup on usage","p":"Usage + 5% markup; Enterprise (SSO/RBAC) on request","b":"Unified gateway to 400+ models w/ failover & caching","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"RouteLLM (LMSYS)","u":"https://github.com/lm-sys/RouteLLM","co":"Lm sys","f":"Free, open-source (Apache-2.0); trained router models, OpenAI-compatible server","p":"n/a","b":"Research-grade classifier routing cheap vs strong models","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Together AI","u":"https://docs.together.ai/","co":"Together AI","f":"Free signup credits; OpenAI-compatible endpoint","p":"~$0.05-$9 / 1M tokens (per model)","b":"OpenAI-compatible open-model inference + fine-tuning","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"TrueFoundry AI Gateway","u":"https://www.truefoundry.com/ai-gateway","co":"Truefoundry","f":"Free/trial tier; self-host & hosted options","p":"Enterprise pricing (custom)","b":"Enterprise LLM+MCP+Agent gateway, on-prem/VPC","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Unify (LLM Router)","u":"https://unify.ai/","co":"Unify","f":"$100 free credits to start; single-key dynamic routing","p":"Usage-based; team plans on request","b":"Quality/cost/speed-optimized dynamic model routing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vercel AI Gateway","u":"https://vercel.com/ai-gateway","co":"Vercel","f":"$5 credits / 30 days; zero-markup tokens; BYOK","p":"Provider list price, zero markup","b":"Unified model access integrated with Vercel AI SDK","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Amazon Bedrock","u":"https://aws.amazon.com/bedrock/","co":"AWS","f":"none (pay-per-use; AWS Free Tier credits may apply)","p":"Per-token, per-model on-demand pricing","b":"Unified single-API access to 30+ foundation models on AWS","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"},{"n":"Google Vertex AI Model Garden (MaaS)","u":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/model-garden/explore-models","co":"Google Cloud","f":"none (pay-per-use; GCP free trial credits may apply)","p":"Per-token, per-model on-demand pricing","b":"Unified GCP access to Gemini + partner/open models (OpenAI-compatible)","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"},{"n":"Martian (Model Router)","u":"https://withmartian.com/","co":"Withmartian","f":"none (signup/contact required)","p":"Usage-based (custom)","b":"Prompt-aware routing to best model per request","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Local model runtimes","count":25,"entries":[{"n":"Cortex.cpp","u":"https://github.com/janhq/cortex.cpp","co":"Janhq","f":"Free, open-source; OpenAI-compatible local AI API platform","p":"n/a","b":"Multi-engine local server (llama.cpp/ONNX/TensorRT-LLM)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GPT4All (Local API Server)","u":"https://docs.gpt4all.io/gpt4all_api_server/home.html","co":"Gpt4all","f":"Free desktop app; OpenAI-compatible server on :4891 (localhost only)","p":"n/a","b":"Privacy-first desktop LLM with local HTTP API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GPUStack","u":"https://github.com/gpustack/gpustack","co":"Gpustack","f":"Free, open-source; OpenAI-compatible cluster serving","p":"n/a","b":"Cluster-wide GPU model serving + management","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Hugging Face Text Generation Inference (TGI)","u":"https://huggingface.co/docs/text-generation-inference/en/messages_api","co":"Hugging Face","f":"Free, open-source; self-hosted Messages API (OpenAI-compatible)","p":"n/a","b":"Production Rust/Python LLM serving toolkit","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Jan (Local API Server)","u":"https://www.jan.ai/docs/desktop/api-server","co":"Jan","f":"Free desktop app; OpenAI-compatible server on :1337 (optional API key)","p":"n/a","b":"Offline desktop assistant w/ llama.cpp backend API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"KoboldCpp","u":"https://github.com/LostRuins/koboldcpp/","co":"LostRuins","f":"Free, single-binary; OpenAI API at /v1 (default :5001)","p":"n/a","b":"One-file GGUF server, UI + image/TTS/embeddings","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Lemonade Server (AMD)","u":"https://lemonade-server.ai/","co":"Lemonade server","f":"Free, open-source; OpenAI-compatible local server","p":"n/a","b":"NPU/GPU-accelerated local LLM on AMD hardware","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"llama-cpp-python (server)","u":"https://llama-cpp-python.readthedocs.io/en/latest/server/","co":"Readthedocs","f":"Free, open-source; OpenAI-compatible web server","p":"n/a","b":"Python bindings w/ drop-in OpenAI server","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"llama-swap","u":"https://github.com/mostlygeek/llama-swap","co":"Mostlygeek","f":"Free, open-source; model-swapping proxy for OpenAI/Anthropic servers","p":"n/a","b":"On-demand model swapping in front of llama.cpp/vLLM","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"llama.cpp (llama-server)","u":"https://github.com/ggml-org/llama.cpp/blob/master/tools/server/README.md","co":"llama.cpp","f":"Free, open-source; local C++ HTTP server, no key","p":"n/a","b":"Lightweight GGUF inference, OpenAI-compatible","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"llamafile (Mozilla.ai)","u":"https://github.com/mozilla-ai/llamafile","co":"Mozilla ai","f":"Free, open-source; single executable, OpenAI API on :8080","p":"n/a","b":"Single-file portable LLM server, no install","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LM Studio (local server)","u":"https://lmstudio.ai/docs/app/api/endpoints/openai","co":"Lmstudio","f":"Free desktop app; local OpenAI/Anthropic server on :1234","p":"n/a","b":"Desktop GUI + local OpenAI-compatible endpoints","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LocalAI","u":"https://localai.io/","co":"Localai","f":"Free, open-source; OpenAI-compatible API, no key by default","p":"n/a","b":"Drop-in OpenAI replacement; text/image/audio on CPU","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MLX Omni Server","u":"https://github.com/madroidmaq/mlx-omni-server","co":"Madroidmaq","f":"Free, open-source; OpenAI/Anthropic API on Apple Silicon","p":"n/a","b":"Local OpenAI-compatible MLX inference on M-series","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"mlx-lm server (Apple MLX)","u":"https://github.com/ml-explore/mlx-lm","co":"Ml explore","f":"Free, open-source; OpenAI-compatible server for Apple Silicon","p":"n/a","b":"Native Metal-accelerated LLM serving on Macs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NVIDIA NIM (self-hosted)","u":"https://developer.nvidia.com/nim","co":"Nvidia","f":"Free for NVIDIA Developer Program members (self-host dev license); hosted preview also free","p":"NVIDIA AI Enterprise license for production","b":"Containerized GPU inference, OpenAI-compatible","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ollama","u":"https://docs.ollama.com/api","co":"Ollama","f":"Free, open-source; local REST server on :11434, no key","p":"n/a","b":"Easiest local LLM REST server + model pulls","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenLLM (BentoML)","u":"https://github.com/bentoml/OpenLLM","co":"Bentoml","f":"Free, open-source; OpenAI-compatible API on :3000","p":"BentoCloud managed hosting (usage-based)","b":"One-command self-host OSS LLMs as OpenAI API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"RamaLama","u":"https://github.com/containers/ramalama","co":"Containers","f":"Free, open-source; OpenAI-compatible serve via containers, no key","p":"n/a","b":"Container-based local model serving (llama.cpp/vLLM/MLX)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SGLang (server)","u":"https://docs.sglang.ai/basic_usage/openai_api.html","co":"Sglang","f":"Free, open-source; OpenAI-compatible server on :30000","p":"n/a","b":"Fast structured-output GPU serving, RadixAttention","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"TabbyAPI (ExLlamaV2/V3)","u":"https://github.com/theroyallab/tabbyAPI/","co":"Theroyallab","f":"Free, open-source; OAI + KoboldAI API on :5000","p":"n/a","b":"Fast EXL2/GPTQ quantized serving on consumer GPUs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"text-generation-webui (oobabooga)","u":"https://github.com/oobabooga/text-generation-webui/wiki/12-%E2%80%90-OpenAI-API","co":"Oobabooga","f":"Free, open-source; OpenAI-compatible API via --api on :5000","p":"n/a","b":"Feature-rich local UI with OpenAI-compatible API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"vLLM (OpenAI-compatible server)","u":"https://docs.vllm.ai/en/latest/serving/openai_compatible_server/","co":"Vllm","f":"Free, open-source; self-hosted, optional API key","p":"n/a","b":"High-throughput GPU serving, PagedAttention batching","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"vllm-mlx","u":"https://github.com/waybarrios/vllm-mlx","co":"Waybarrios","f":"Free, open-source; OpenAI + Anthropic API, MCP tool calls","p":"n/a","b":"vLLM-style batched serving on Apple Silicon","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Xinference (Xorbits Inference)","u":"https://github.com/xorbitsai/inference","co":"Xorbitsai","f":"Free, open-source; OpenAI-compatible RESTful API + WebUI","p":"n/a","b":"Unified multi-backend LLM/embeddings/speech serving","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"}]},{"category":"Low-code agent & workflow builders","count":25,"entries":[{"n":"Activepieces (REST API)","u":"https://www.activepieces.com/docs/","co":"Activepieces","f":"Free MIT open-source self-hosted; 280+ pieces usable as MCP","p":"Cloud from $10/mo","b":"Open-source Zapier-style automation with MCP/AI","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Botpress (Chat API)","u":"https://botpress.com/docs/api-reference/chat-api/introduction","co":"Botpress","f":"Free pay-as-you-go: 500 msgs/mo + $5 AI credit; HTTP Chat API","p":"Plus plan ~$89/mo + AI Spend","b":"Conversational AI chatbot agents via HTTP/SSE","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Budibase","u":"https://docs.budibase.com/","co":"Budibase","f":"Free open-source self-hosted; REST API + automations + AI features","p":"Premium from ~$5/user/mo","b":"Open-source low-code apps, automations, AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CrewAI","u":"https://github.com/crewAIInc/crewAI","co":"CrewAI","f":"Free open-source Python framework; Enterprise has hosted deploy API","p":"Enterprise (contact sales)","b":"Role-based multi-agent crews, deploy as API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Dify (App/Workflow API)","u":"https://docs.dify.ai/en/use-dify/publish/developing-with-apis","co":"Dify","f":"Free open-source self-hosted; per-app REST API auto-generated","p":"Professional cloud ~$59/mo","b":"RAG + agentic workflow apps with auto REST endpoints","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Flowise (Prediction API)","u":"https://docs.flowiseai.com/api-reference","co":"Flowiseai","f":"Free open-source self-hosted; /api/v1/prediction per chatflow","p":"Flowise Cloud from ~$35/mo","b":"Drag-and-drop LangChain LLM/agent flows as API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Dialogflow CX (REST API)","u":"https://cloud.google.com/dialogflow/cx/docs/reference/rest","co":"Google Cloud","f":"GCP free trial credits; pay-as-you-go after","p":"Usage-based (~$0.007+/request)","b":"Enterprise flow-based conversational agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Gumloop (API & SDKs)","u":"https://docs.gumloop.com/api-reference/getting-started","co":"Gumloop","f":"Free plan ~5,000 credits/mo; REST API + SDK + webhooks need Pro","p":"Pro ~$37/mo","b":"No-code AI automations triggered via API/webhook","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Langflow (Run Flow API)","u":"https://docs.langflow.org/api-reference-api-examples","co":"Langflow","f":"Free open-source self-hosted; POST /api/v1/run/{flow_id}","p":"n/a (OSS); DataStax cloud usage-based","b":"Visual flow-based LLM/agent apps deployed as API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LangGraph / LangServe","u":"https://docs.langchain.com/","co":"LangChain","f":"Free open-source; LangServe exposes agents as REST APIs","p":"LangGraph Platform / LangSmith paid tiers","b":"Stateful graph-based agent orchestration as API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Lindy AI (API & webhooks)","u":"https://docs.lindy.ai/skills/by-lindy/webhooks","co":"Lindy","f":"Free plan with task credits; webhook triggers + HTTP/callback across 5,000+ apps","p":"Pro from ~$49/mo","b":"No-code conversational/workflow agents via webhooks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Make (Make API)","u":"https://developers.make.com/api-documentation","co":"Make","f":"Free plan (1,000 ops/mo); most API endpoints paid-only","p":"Core from ~$9/mo","b":"Visual scenario automation, programmatic mgmt API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft AutoGen","u":"https://github.com/microsoft/autogen","co":"Microsoft","f":"Free open-source multi-agent framework; AutoGen Studio no-code UI","p":"n/a (OSS)","b":"Conversational multi-agent collaboration systems","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Microsoft Power Automate","u":"https://learn.microsoft.com/en-us/power-automate/manage-flows-with-code","co":"Microsoft","f":"Free tier with Microsoft 365; cloud flows + AI Builder, REST mgmt API","p":"Premium ~$15/user/mo","b":"Enterprise low-code automation with AI Builder agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"n8n (Public REST API)","u":"https://docs.n8n.io/api/","co":"N8n","f":"Free unlimited self-hosted Community Edition; REST API included","p":"Cloud Starter ~EUR24/mo","b":"Self-hosted workflow automation with AI agent nodes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pipedream (REST API)","u":"https://pipedream.com/docs/rest-api/","co":"Pipedream","f":"Free developer tier; REST API to create/run workflows","p":"Basic from ~$29/mo","b":"Developer-first API orchestration + AI workflows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Rasa (HTTP API)","u":"https://rasa.com/docs/rasa/pages/http-api/","co":"Rasa","f":"Free open-source Rasa server; REST webhook /webhooks/rest/webhook","p":"Rasa Pro / Enterprise (contact sales)","b":"Self-hosted conversational NLU assistants","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Relevance AI (API)","u":"https://relevanceai.com/docs/agent/build-your-agent/agent-triggers/api","co":"Relevanceai","f":"Free plan with credits; trigger agents via POST /agents/trigger + SDK","p":"Pro from ~$19/mo","b":"Build and trigger multi-agent AI workforce via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Retool (Workflows / API)","u":"https://docs.retool.com/workflows","co":"Retool","f":"Free plan (limited workflow runs); REST/webhook-triggerable Workflows + AI Actions","p":"Team from ~$10/user/mo","b":"Low-code internal apps, automations and AI agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stack AI (Run Flow API)","u":"https://docs.stackai.com/interface-and-deployment/api-reference/run-flow","co":"Stack ai","f":"Free tier; per-flow REST endpoint auto-generated on export","p":"Starter from ~$199/mo","b":"Visual LLM app/agent builder for internal tools","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Trigger.dev","u":"https://trigger.dev/docs/introduction","co":"Trigger","f":"Free open-source (Apache 2.0) self-hostable; cloud free ~$5 usage + 20 concurrent runs","p":"Hobby ~$10/mo usage","b":"Durable TS background jobs and AI agent workflows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Typebot (API)","u":"https://docs.typebot.io/api-reference","co":"Typebot","f":"Free fair-source self-hosted; cloud Free 200 chats/mo; Chat API + webhooks","p":"Starter cloud ~$39/mo","b":"Visual conversational form/chatbot builder, self-host","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vellum (Execute Workflow API)","u":"https://docs.vellum.ai/developers/client-sdk/introduction","co":"Vellum","f":"Free trial; POST predict.vellum.ai/v1/execute-workflow","p":"Paid plans (contact sales)","b":"Prompt + agentic workflow eval and deployment","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Voiceflow (Dialog Manager API)","u":"https://docs.voiceflow.com/reference/api-overview","co":"Voiceflow","f":"Free Sandbox tier; Dialog Manager /interact endpoint","p":"Pro from ~$60/mo","b":"No-code chat/voice agent design, deploy via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Zapier AI Actions","u":"https://actions.zapier.com/","co":"Zapier","f":"Free Zapier tier; AI Actions REST API exposing 7,000+ app actions","p":"Starter from ~$19.99/mo","b":"Natural-language actions across 7k+ apps for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Manufacturing & Supply chain","count":29,"entries":[{"n":"AISHub","u":"https://www.aishub.net/api","co":"Aishub","f":"Free w/ key (requires contributing AIS receiver data)","p":"n/a","b":"Community-shared real-time ship positions (JSON/XML/CSV)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"aisstream.io","u":"https://aisstream.io/","co":"Aisstream","f":"Free w/ key (WebSocket AIS stream, GitHub login)","p":"n/a","b":"Real-time global vessel AIS positions via WebSocket","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Barcode Lookup API","u":"https://www.barcodelookup.com/api","co":"Barcodelookup","f":"Free trial (limited)","p":"Paid subscription tiers","b":"UPC/EAN/ISBN product data, images, pricing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Census International Trade API","u":"https://www.census.gov/data/developers/data-sets/international-trade.html","co":"U.S. Census Bureau","f":"Free w/ key (Census API key)","p":"n/a","b":"US monthly imports/exports by HS code & port","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Datakick / gtinsearch.org (Open Product Database)","u":"https://gtinsearch.org/api","co":"Gtinsearch","f":"Free, keyless (no rate limit, auth optional)","p":"n/a","b":"Open crowdsourced GTIN/barcode product lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Digi-Key Product Information API","u":"https://developer.digikey.com/","co":"Digikey","f":"Free w/ key (OAuth; daily search limits)","p":"n/a (higher limits by approval)","b":"Electronic parts catalog, real-time price & stock","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DLA PUB LOG / FLIS (NSN data)","u":"https://www.dla.mil/Information-Operations/Services/Applications/PUB-LOG/","co":"Dla","f":"Free, public (PUB LOG downloadable datasets, monthly)","p":"n/a","b":"NATO Stock Numbers, CAGE codes, defense parts data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EU TARIC / EU Customs Tariff open data","u":"https://taxation-customs.ec.europa.eu/customs/common-customs-tariff-cct/tariff-classification-goods/eu-customs-tariff-taric_en","co":"European Commission","f":"Free, public (open data downloads, daily updates)","p":"n/a","b":"EU customs duty rates and tariff measures by code","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"FRED API (manufacturing/IP indicators)","u":"https://fred.stlouisfed.org/docs/api/fred/","co":"FRED (St. Louis Fed)","f":"Free w/ key","p":"n/a","b":"Industrial production, PMI, supply chain macro series","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Freightos / FBX (Freightos Baltic Index)","u":"https://developers.freightos.com/freight-tools","co":"Freightos","f":"Some FBX headline metrics free; CSV on request","p":"Paid / licensed (contact sales)","b":"Container spot freight rate index & benchmarking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Go-UPC","u":"https://go-upc.com/api","co":"Go upc","f":"Free trial w/ key (limited lookups)","p":"~$29/mo entry plan","b":"Global barcode database, UPC/EAN/ISBN, bulk lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GS1 US Data Hub APIs","u":"https://www.gs1us.org/tools/gs1-us-data-hub/gs1-us-apis","co":"Gs1us","f":"Free 60-day trial: 3 View/Use APIs, 1,000 calls each","p":"API add-on annual fee (subscription)","b":"Authoritative GTIN/GLN/company verification, master data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mouser API","u":"https://www.mouser.com/api-hub/","co":"Mouser","f":"Free w/ key (My Mouser account signup)","p":"n/a","b":"Electronic component search, pricing, availability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nexar / Octopart API","u":"https://nexar.com/api","co":"Nexar","f":"Free Welcome plan: 1,000 results/month w/ key","p":"Paid tiers for higher volume","b":"Electronic component search, stock, pricing, lifecycle","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NY Fed Global Supply Chain Pressure Index (GSCPI)","u":"https://www.newyorkfed.org/research/policy/gscpi","co":"Newyorkfed","f":"Free, keyless (monthly XLSX data download)","p":"n/a","b":"Macro indicator of global supply chain pressure","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Food Facts API","u":"https://world.openfoodfacts.org/data","co":"Openfoodfacts","f":"Free, keyless (open data, 2.9M+ products by GTIN/EAN)","p":"n/a","b":"Open product/barcode database for packaged goods","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenCorporates API","u":"https://api.opencorporates.com/","co":"Opencorporates","f":"Free w/ key for open-data/non-commercial use (share-alike)","p":"From ~GBP 2,250/yr (commercial)","b":"Company registry data across 170+ jurisdictions (supplier vetting)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SAM.gov Entity Management API","u":"https://open.gsa.gov/api/entity-api/","co":"U.S. GSA","f":"Free w/ public API key (request via SAM.gov account)","p":"n/a","b":"US supplier/vendor registration & UEI lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SeaRates Tracking API","u":"https://www.searates.com/integrations/api-container-tracking/","co":"Searates","f":"Free trial credits w/ key","p":"Paid plans / pay-as-you-go","b":"Container tracking, route planner, freight rates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ShipsGo Container Tracking API","u":"https://shipsgo.com/ocean/container-tracking-api","co":"Shipsgo","f":"Free sign-up; unlimited API calls (1 credit per shipment)","p":"Pay-as-you-go credits","b":"Ocean container milestones, vessel position, ETA","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UN Comtrade API","u":"https://comtradedeveloper.un.org/","co":"United Nations","f":"Free w/ key: 500 calls/day, 100k records/call","p":"Premium subscription (contact sales)","b":"Global bilateral import/export trade statistics by HS code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UPCitemdb","u":"https://www.upcitemdb.com/","co":"Upcitemdb","f":"Free trial plan: 100 requests/day, no signup","p":"Paid plans (per-request/subscription)","b":"UPC/EAN barcode-to-product lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USITC DataWeb API","u":"https://dataweb.usitc.gov/","co":"Usitc","f":"Free w/ account & API token","p":"n/a","b":"US import/export trade and tariff data, HTS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USITC Harmonized Tariff Schedule (HTS) REST API","u":"https://hts.usitc.gov/reststop/search","co":"Usitc","f":"Free, keyless (REST API, JSON/CSV/XLSX export)","p":"n/a","b":"US tariff classification codes and duty rates lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"World Bank WITS (World Integrated Trade Solution) API","u":"https://wits.worldbank.org/witsapiintro.aspx","co":"World Bank","f":"Free, keyless (REST/SDMX trade & tariff data)","p":"n/a","b":"Global trade flows, tariffs, NTMs by country & product","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Drewry World Container Index (WCI)","u":"https://www.drewry.co.uk/supply-chain-advisors/supply-chain-expertise/world-container-index-assessed-by-drewry","co":"Drewry","f":"none (weekly headline figure free to view)","p":"Paid subscription for full data","b":"Composite container freight rates on major lanes","s":"Available","fr":0,"kl":0,"kr":0,"cf":"m"},{"n":"Everstream Analytics API","u":"https://www.everstream.ai/integrations/","co":"Everstream","f":"none (enterprise SCRM platform)","p":"Enterprise subscription (contact sales)","b":"Supply chain risk, disruption & ESG monitoring","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"project44 API","u":"https://developers.project44.com/","co":"Project44","f":"none (enterprise platform)","p":"Enterprise subscription (contact sales)","b":"Multimodal supply chain visibility & predictive ETAs","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Vizion API","u":"https://www.vizionapi.com/","co":"Vizionapi","f":"none (trial on request)","p":"Paid subscription (contact sales)","b":"Standardized container tracking & shipment milestones","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Maritime & vessel tracking (AIS)","count":23,"entries":[{"n":"AISHub","u":"https://www.aishub.net/","co":"Aishub","f":"Free w/ key (must share own AIS receiver feed)","p":"n/a","b":"Aggregated community AIS feed, JSON/XML/CSV","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AISStream.io","u":"https://aisstream.io/","co":"Aisstream","f":"Free w/ key, unlimited WebSocket stream","p":"n/a","b":"Real-time global AIS positions via WebSocket JSON","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AISViz / AISdb (Dalhousie/MERIDIAN)","u":"https://github.com/AISViz/AISdb","co":"AISViz","f":"Free, open-source toolkit (Python pkg on PyPI)","p":"n/a","b":"Open AIS storage, integration & analysis tooling","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"BarentsWatch Live AIS API","u":"https://developer.barentswatch.no/docs/AIS/live-ais-api/","co":"Barentswatch","f":"Free w/ OAuth client (registration; NLOD)","p":"n/a","b":"Norwegian-waters live AIS ship positions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Danish Maritime Authority (DMA) AIS Data","u":"https://www.dma.dk/safety-at-sea/navigational-information/ais-data","co":"Dma","f":"Free, keyless (bulk CSV, ~2 yrs + historical)","p":"n/a","b":"Danish/Baltic historical AIS traffic, monthly CSV bulk","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"datasets/un-locode (GitHub)","u":"https://github.com/datasets/un-locode","co":"Datasets","f":"Free, keyless (open data repo, PDDL)","p":"n/a","b":"Versioned UN/LOCODE + country codes for pipelines","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Digitraffic Marine (Fintraffic)","u":"https://www.digitraffic.fi/en/marine-traffic/","co":"Digitraffic","f":"Free, keyless (REST + MQTT/WebSocket)","p":"n/a","b":"Finnish/Baltic vessel locations, metadata, port calls","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GFW R package (gfwr)","u":"https://globalfishingwatch.github.io/gfwr/","co":"Globalfishingwatch","f":"Free (wraps GFW API, needs free token)","p":"n/a","b":"R access to Global Fishing Watch AIS datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Global Fishing Watch API","u":"https://globalfishingwatch.org/our-apis/documentation","co":"Globalfishingwatch","f":"Free w/ token (registration, non-commercial only)","p":"n/a","b":"Fishing effort, vessel identity, encounters, port visits","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Kystverket Kystdatahuset (Norwegian Coastal Admin)","u":"https://kystdatahuset.no/ws/swagger/index.html","co":"Kystdatahuset","f":"Free, keyless (no registration; NLOD license)","p":"n/a","b":"Norwegian-zone AIS real-time + historical, REST/download","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NOAA MarineCadastre AccessAIS","u":"https://marinecadastre.gov/accessais/","co":"Marinecadastre","f":"Free, keyless (bulk US AIS download)","p":"n/a","b":"Historical US coastal AIS traffic, CSV/GeoParquet bulk","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Searoutes API","u":"https://searoutes.com/vessel-api/","co":"Searoutes","f":"Free trial key (7 days, 100 calls)","p":"Credit-based plans (from ~1000 calls/mo)","b":"Sea route calc, AIS-based ETA predictions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sinay Maritime APIs (Hub)","u":"https://sinay.ai/en/sinay-hub/vessel-api/","co":"Sinay","f":"Free plan w/ key (~500 calls/mo, no card)","p":"Pro plan (~10k calls/mo); pay-as-you-go credits","b":"Vessel tracking, port congestion, ETA, emissions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UN/LOCODE (UNECE official)","u":"https://unece.org/trade/cefact/UNLOCODE-Download","co":"Unece","f":"Free, keyless bulk download (CSV/MDB/TXT)","p":"n/a","b":"Official global port & location code registry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UN/LOCODE on DataHub.io","u":"https://datahub.io/core/un-locode","co":"Datahub","f":"Free, keyless (stable CSV URLs, PDDL)","p":"n/a","b":"Script-friendly hosted UN/LOCODE port code dataset","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"VesselAPI","u":"https://vesselapi.com/","co":"Vesselapi","f":"Free tier w/ key (no card; sub-minute updates)","p":"Paid subscription tiers","b":"REST AIS tracking, port events by UN/LOCODE","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Datalastic","u":"https://datalastic.com/api-reference/","co":"Datalastic","f":"none (EUR9 trial)","p":"From ~EUR199/mo (Starter); up to ~EUR679/mo unlimited","b":"Vessel tracking, port lookups by UN/LOCODE","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Kpler Maritime (vessel intelligence)","u":"https://www.kpler.com/product/maritime","co":"Kpler","f":"none","p":"Enterprise quote","b":"Commodity flows, vessel intelligence, port analytics","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"MarineTraffic API (Kpler)","u":"https://servicedocs.marinetraffic.com/","co":"Marinetraffic","f":"none","p":"Enterprise/subscription via Kpler sales","b":"Largest AIS dataset, port calls, ship photos","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"MyShipTracking API","u":"https://api.myshiptracking.com/","co":"Myshiptracking","f":"none (free position lookups on website)","p":"Credit-based API plans","b":"Vessel positions, port calls by UN/LOCODE, history","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Spire Maritime API (now Kpler)","u":"https://spire.com/maritime/","co":"Spire","f":"none (demo on request)","p":"Enterprise quote","b":"Satellite + terrestrial AIS, global blue-water coverage","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"VesselFinder API","u":"https://api.vesselfinder.com/docs/","co":"Vesselfinder","f":"none (trial credits on request)","p":"Credit-based, from ~EUR330 / 10k credits","b":"Per-vessel AIS lookups, voyage & particulars","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"VT Explorer AIS Data API","u":"https://api.vtexplorer.com/docs/","co":"Vtexplorer","f":"none (free trial on request)","p":"Credit-based (subscription or on-demand)","b":"Live/area AIS positions, fleet & port-call data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Materials science","count":28,"entries":[{"n":"2DMatPedia","u":"https://www.2dmatpedia.org/","co":"2dmatpedia","f":"Free, keyless; OPTIMADE endpoint + bulk download","p":"n/a","b":"6000+ 2D monolayer materials, computed props","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AFLOW (AFLOWLIB)","u":"https://aflow.org/documentation/","co":"Aflow","f":"Free, keyless REST API + AFLUX search","p":"n/a","b":"High-throughput DFT props, 3.5M+ compounds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Alexandria Materials DB","u":"https://alexandria.icams.rub.de/","co":"Rub","f":"Free, keyless; OPTIMADE endpoint","p":"n/a","b":"Millions of PBE/PBEsol/SCAN computed structures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Battery Archive","u":"https://www.batteryarchive.org/","co":"Batteryarchive","f":"Free; open cycling data via web + bulk GitHub scripts","p":"n/a","b":"Public battery cell cycling/aging test data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"C2DB (Computational 2D Materials DB)","u":"https://cmr.fysik.dtu.dk/c2db/c2db.html","co":"Dtu","f":"Free; browse + ASE .db download; partial OPTIMADE","p":"n/a","b":"DFT/GW props of 15k+ atomically thin 2D crystals","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Citrination (Citrine Informatics)","u":"https://citrination.com/","co":"Citrination","f":"Legacy public datasets remain at existing URLs/DOIs; platform decommissioned","p":"Paid (Citrine.io platform / DataManager)","b":"Materials/chemicals data + ML platform (legacy)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Computational Materials Repository (CMR, DTU)","u":"https://cmr.fysik.dtu.dk/","co":"Dtu","f":"Free, keyless; OPTIMADE (subset) + ASE db downloads","p":"n/a","b":"30+ DTU computed materials datasets (catalysis, 2D)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Crystallography Open Database (COD)","u":"https://wiki.crystallography.net/RESTful_API/","co":"Crystallography","f":"Free, keyless; CIF retrieval + REST query","p":"n/a","b":"Open crystal structures (CIF) for organic/inorganic","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GNoME (Materials Discovery, DeepMind)","u":"https://github.com/google-deepmind/materials_discovery","co":"Google deepmind","f":"Free, keyless; 380k+ stable structures bulk download","p":"n/a","b":"DeepMind-discovered stable inorganic crystal structures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Materials Cloud (incl. MC3D)","u":"https://optimade.materialscloud.org/","co":"Materialscloud","f":"Free, keyless; OPTIMADE + Archive deposits","p":"n/a","b":"Curated 3D crystal DB + published research datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Materials Data Facility (MDF Forge)","u":"https://www.materialsdatafacility.org/","co":"Materialsdatafacility","f":"Free; Globus auth for Forge Python client","p":"n/a","b":"Discover/access large ML-ready materials datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Materials Platform for Data Science (MPDS / PAULING FILE)","u":"https://developer.mpds.io/","co":"Mpds","f":"Partial open data free; OPTIMADE; rest by subscription","p":"Paid subscription (SLA)","b":"Curated props, crystal structures, phase diagrams","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Materials Project","u":"https://api.materialsproject.org/docs","co":"Materialsproject","f":"Free w/ key (register for API key)","p":"n/a","b":"DFT-computed inorganic props, bands, batteries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MatWeb","u":"https://www.matweb.com/","co":"Matweb","f":"Free registered search; no public REST API (XML via license)","p":"Paid (premium / database license)","b":"Engineering material datasheets (metals, plastics)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NIST Chemistry WebBook (SRD 69)","u":"https://webbook.nist.gov/chemistry/","co":"NIST","f":"Free, keyless web access; no official REST API","p":"n/a","b":"Thermochemical/thermophysical fluid & species data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST Interatomic Potentials Repository","u":"https://www.ctcms.nist.gov/potentials/","co":"NIST","f":"Free, keyless; potentials + metadata, OpenKIM links","p":"n/a","b":"Validated interatomic potentials for MD simulations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST-JARVIS","u":"https://jarvis-materials-design.github.io/dbdocs/jarvisapi/","co":"Jarvis materials design","f":"Free; figshare bulk + JARVIS-OPTIMADE endpoint","p":"n/a","b":"DFT/FF/ML materials data, 2D & defects, ML models","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NOMAD (FAIRmat)","u":"https://nomad-lab.eu/prod/v1/api/v1/","co":"Nomad lab","f":"Free, keyless for reads; REST + OPTIMADE + DCAT","p":"n/a","b":"100M+ raw DFT/MD calculations, FAIR archive","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Catalyst Project (OCP)","u":"https://opencatalystproject.org/","co":"Opencatalystproject","f":"Free, keyless; OC20/OC22 datasets via download/HF","p":"n/a","b":"ML-ready catalyst adsorption/relaxation DFT datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Materials Database (OMDB)","u":"https://optimade.openmaterialsdb.se/","co":"Openmaterialsdb","f":"Free, keyless; OPTIMADE endpoint (httk)","p":"n/a","b":"68k+ computed materials props via High-Throughput Toolkit","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenKIM (Knowledgebase of Interatomic Models)","u":"https://openkim.org/","co":"Openkim","f":"Free, keyless; query API + model/test downloads","p":"n/a","b":"Interatomic models, predictions & test results for MD","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenMindat (Mindat.org API)","u":"https://api.mindat.org/v1/schema/redoc/","co":"Mindat","f":"Free w/ key (token); CC BY-NC-SA 4.0 open data","p":"n/a","b":"Minerals, IMA species, localities, geomaterials","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OPTIMADE (Materials-Consortia federation)","u":"https://www.optimade.org/","co":"Optimade","f":"Free, keyless; unified REST across 20+ providers","p":"n/a","b":"Cross-database structure queries, one standard API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OQMD (Open Quantum Materials Database)","u":"https://oqmd.org/api/","co":"Oqmd","f":"Free, keyless (no credentials required)","p":"n/a","b":"DFT thermodynamic & structural props, 1M+ compounds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PoLyInfo (NIMS)","u":"https://polymer.nims.go.jp/","co":"Go","f":"Free registered access (DICE account); API + RDF/SPARQL","p":"n/a","b":"Polymer property data from literature (NIMS)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PubChem PUG-REST","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (max 5 req/sec)","p":"n/a","b":"Chemical compound properties, structures, descriptors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RRUFF Project","u":"https://rruff.net/","co":"Rruff","f":"Free; bulk Raman/XRD/IR/chemistry data files","p":"n/a","b":"Mineral Raman/IR/XRD spectra & chemistry","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NIST/FIZ Inorganic Crystal Structure Database (ICSD)","u":"https://icsd.nist.gov/","co":"NIST","f":"none (subscription required)","p":"Paid (NIST SRD 84 / FIZ subscription)","b":"210k+ curated inorganic crystal structures","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"}]},{"category":"Mathematics & Statistics","count":28,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"Math/stats preprint metadata and search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BLS (Bureau of Labor Statistics) Public Data API","u":"https://www.bls.gov/developers/","co":"U.S. BLS","f":"Free keyless (limited); free w/ key 500/day","p":"n/a","b":"US labor/economic time-series statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CodeCogs LaTeX Equation Rendering API","u":"https://latex.codecogs.com/","co":"Codecogs","f":"Free, keyless (URL-based rendering)","p":"Paid for private/commercial server license","b":"Render LaTeX math to PNG/SVG images","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"data.gov Statistics / data.census.gov SDMX (added in verify)","u":"https://www.census.gov/data/developers/data-sets.html","co":"U.S. Census Bureau","f":"Free w/ key (generous)","p":"n/a","b":"US Census statistical surveys and demographic data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"DBpedia / Wikipedia math content via REST (added in verify) — Wolfram MathWorld","u":"https://mathworld.wolfram.com/","co":"Wolfram","f":"Free, keyless (web reference; no formal API)","p":"n/a","b":"Mathematics encyclopedia reference lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Eurostat Statistics API","u":"https://ec.europa.eu/eurostat/web/user-guides/data-browser/api-data-access","co":"European Commission","f":"Free, keyless (JSON-stat / SDMX)","p":"n/a","b":"European statistical datasets, official statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FindStat (Combinatorial Statistic Finder)","u":"https://www.findstat.org/","co":"Findstat","f":"Free, keyless (JSON endpoints)","p":"n/a","b":"Combinatorial statistics and maps lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IMF Data API (SDMX)","u":"https://data.imf.org/en/Resource-Pages/IMF-API","co":"IMF","f":"Free, keyless (SDMX 2.1/3.0)","p":"n/a","b":"International macro-financial statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Integer Factorization API (justyy / HelloACM)","u":"https://api.justyy.workers.dev/api/factor/","co":"Workers","f":"Free, keyless (fair use)","p":"n/a","b":"Factorize integers / prime factor computation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LMFDB (L-functions and Modular Forms Database)","u":"https://www.lmfdb.org/api/","co":"Lmfdb","f":"Free, keyless (JSON API, _format=json)","p":"n/a","b":"Number theory objects: L-functions, modular forms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Math Tools API (api.math.tools)","u":"https://api.math.tools/","co":"Math","f":"Free keyless public tier (low daily limit)","p":"Paid subscription for higher limits","b":"Number conversions, facts, primes, Pi digits","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Math.js Web Service API","u":"https://api.mathjs.org/","co":"Mathjs","f":"Free, keyless (fair-use rate limit)","p":"n/a","b":"Evaluating math expressions over HTTP","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Mathpix Convert (OCR) API","u":"https://docs.mathpix.com/","co":"Mathpix","f":"Free w/ key, 1,000 requests/mo","p":"Pay-as-you-go (per-request, volume tiers)","b":"OCR of printed/handwritten math to LaTeX","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Newton API (math micro-service)","u":"https://newton.vercel.app/","co":"Vercel","f":"Free, keyless (~5 req/sec)","p":"n/a","b":"Symbolic derive/integrate/simplify/factor expressions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIST DLMF (Digital Library of Mathematical Functions)","u":"https://dlmf.nist.gov/","co":"NIST","f":"Free, keyless (web reference + downloadable data)","p":"n/a","b":"Special functions formulas, identities, reference data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Numbers API (numbersapi.com)","u":"http://numbersapi.com/","co":"Numbersapi","f":"Free, keyless, unlimited","p":"n/a","b":"Trivia/math/date facts about numbers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OECD Data / SDMX API","u":"https://sdmx.oecd.org/public","co":"OECD","f":"Free, keyless (SDMX, rate-limited)","p":"n/a","b":"OECD economic and social statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OEIS (On-Line Encyclopedia of Integer Sequences)","u":"https://oeis.org/","co":"Oeis","f":"Free, keyless (JSON search API)","p":"n/a","b":"Identifying/looking up integer sequences by terms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Our World in Data API","u":"https://docs.owid.io/projects/etl/api/","co":"Owid","f":"Free, keyless (charts/indicators/catalog)","p":"n/a","b":"Curated global development/statistics indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"QuickChart API","u":"https://quickchart.io/documentation/","co":"Quickchart","f":"Free, keyless (rate-limited)","p":"~$10/mo paid plan","b":"Render charts/graphs from JSON config","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RANDOM.ORG API","u":"https://api.random.org/json-rpc/4/basic","co":"Random","f":"Free w/ key, daily bit/request quota","p":"Paid plans for higher volume","b":"True random numbers from atmospheric noise","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SDMX Global Registry / UNdata2 (added in verify)","u":"https://stats.un.org/SDGAPI/swagger/","co":"United Nations","f":"Free, keyless (UN SDG indicators REST API)","p":"n/a","b":"UN Sustainable Development Goals indicator statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UNdata / UN Statistics API","u":"https://data.un.org/","co":"United Nations","f":"Free, keyless (SDMX for many series)","p":"n/a","b":"UN system statistical databases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikidata SPARQL Query Service","u":"https://query.wikidata.org/sparql","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Querying mathematical objects/concepts via SPARQL","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wolfram|Alpha Full Results API","u":"https://products.wolframalpha.com/api","co":"Wolframalpha","f":"Free w/ key, 2,000 non-commercial calls/mo","p":"Paid commercial plans (per-call)","b":"Computational knowledge, math/stats queries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"World Bank Indicators API (added in verify)","u":"https://datahelpdesk.worldbank.org/knowledgebase/articles/889392","co":"World Bank","f":"Free, keyless (JSON/XML)","p":"n/a","b":"Global development statistics time-series","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"zbMATH Open API","u":"https://api.zbmath.org/v1/","co":"Zbmath","f":"Free, keyless (REST + OAI-PMH)","p":"n/a","b":"Math reviews/bibliographic metadata, open access","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Prime Numbers API (prime-numbers-api.com)","u":"https://prime-numbers-api.com/","co":"Prime numbers api","f":"none (commercial DB)","p":"Paid subscription","b":"Large curated prime number database queries","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Medicine & Clinical sciences","count":27,"entries":[{"n":"Cerner / Oracle Health open FHIR sandbox","u":"https://fhir.cerner.com/","co":"Cerner","f":"Free open read-only R4 endpoint (https://fhir-open.cerner.com/r4/, no auth)","p":"n/a","b":"Testing apps against Cerner Millennium FHIR","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless REST/JSON","p":"n/a","b":"Querying registered clinical trial study records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DailyMed API (NLM)","u":"https://dailymed.nlm.nih.gov/dailymed/app-support-web-services.cfm","co":"NLM (NIH)","f":"Free, keyless REST (XML/JSON)","p":"n/a","b":"FDA structured product labels (SPL) lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Disease Ontology / EBI OLS API","u":"https://www.ebi.ac.uk/ols4/help","co":"EMBL-EBI","f":"Free, keyless REST (ontology lookup)","p":"n/a","b":"Disease, anatomy & biomedical ontology terms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Epic on FHIR developer sandbox","u":"https://fhir.epic.com/","co":"Epic","f":"Free sandbox after app registration","p":"n/a","b":"Building/testing SMART apps for Epic EHR","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Europe PMC RESTful API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless; 40M+ records incl. preprints","p":"n/a","b":"Full-text life-science literature & citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HAPI FHIR public test server","u":"https://hapi.fhir.org/","co":"Fhir","f":"Free, keyless R4/R5 sandbox (purged regularly)","p":"n/a","b":"FHIR app prototyping against synthetic data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Human Phenotype Ontology (HPO) API","u":"https://clinicaltables.nlm.nih.gov/apidoc/hpo/v3/doc.html","co":"NLM (NIH)","f":"Free, keyless REST","p":"n/a","b":"Phenotype terms linked to rare diseases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"MedlinePlus Connect / Health Topics API (NLM)","u":"https://medlineplus.gov/about/developers/webservices/","co":"Medlineplus","f":"Free, keyless health-info web service","p":"n/a","b":"Consumer health topic & code-linked info","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MeSH RDF / SPARQL API (NLM)","u":"https://id.nlm.nih.gov/mesh/","co":"NLM (NIH)","f":"Free, keyless RDF/REST/SPARQL","p":"n/a","b":"Medical Subject Headings vocabulary lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Monarch Initiative BioLink API","u":"https://api.monarchinitiative.org/api/","co":"Monarchinitiative","f":"Free, keyless REST","p":"n/a","b":"Disease-phenotype-gene semantic associations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NCI Genomic Data Commons (GDC) API","u":"https://docs.gdc.cancer.gov/API/Users_Guide/Getting_Started/","co":"Cancer","f":"Free, keyless for open cancer genomics data","p":"n/a","b":"Cancer genomics, clinical & biospecimen data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NHS England Terminology Server (FHIR)","u":"https://digital.nhs.uk/developer/api-catalogue/terminology-server-fhir","co":"Nhs","f":"Free w/ registration; SNOMED subject to license, dm+d open","p":"n/a","b":"UK SNOMED CT / dm+d / ICD-10 FHIR terminology","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NLM Clinical Table Search Service","u":"https://clinicaltables.nlm.nih.gov/","co":"NLM (NIH)","f":"Free, keyless autocomplete API","p":"n/a","b":"ICD-10, LOINC, HPO, NPI, conditions lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NPPES NPI Registry API (CMS)","u":"https://npiregistry.cms.hhs.gov/api-page","co":"Hhs","f":"Free, keyless real-time provider lookup","p":"n/a","b":"US healthcare provider identifier directory","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Targets Platform GraphQL API","u":"https://platform.docs.opentargets.org/data-access/graphql-api","co":"Opentargets","f":"Free, keyless GraphQL","p":"n/a","b":"Target-disease-drug evidence & associations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openFDA API","u":"https://open.fda.gov/apis/","co":"openFDA","f":"Free keyless (240/min); free key 120k/day","p":"n/a","b":"Drug/device adverse events, recalls, labels","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PhysioNet (MIMIC, waveform databases)","u":"https://physionet.org/about/database/","co":"Physionet","f":"Free open datasets; credentialed access for MIMIC","p":"n/a","b":"ICU EHR & physiological waveform research data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PubChem PUG REST API","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (5 req/s)","p":"n/a","b":"Chemical/drug compound & bioassay data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubMed / NCBI E-utilities (Entrez)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25500/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s); free key raises to 10 req/s","p":"n/a","b":"Biomedical literature search & citation retrieval","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RxNorm / RxNav API (NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/index.html","co":"NLM (NIH)","f":"Free, keyless (20 req/s/IP)","p":"n/a","b":"Drug normalization, RxCUI lookup, drug classes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SMART Health IT App Launcher / Sandbox","u":"https://launch.smarthealthit.org/","co":"Smarthealthit","f":"Free, open SMART-on-FHIR launcher & sandbox","p":"n/a","b":"Testing SMART on FHIR OAuth app launches","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"SNOMED CT Snowstorm public training FHIR API","u":"https://snowstorm-training.snomedtools.org/fhir/metadata","co":"Snomedtools","f":"Free public training/test FHIR terminology API","p":"n/a","b":"SNOMED CT lookups via FHIR (testing only)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"The Cancer Imaging Archive (TCIA) REST API","u":"https://wiki.cancerimagingarchive.net/display/Public/TCIA+Application+Programming+Interface+(API)+Guides","co":"Cancerimagingarchive","f":"Free, keyless for public DICOM collections","p":"n/a","b":"Public cancer medical imaging (DICOM) datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UMLS Terminology Services (UTS) REST API","u":"https://documentation.uts.nlm.nih.gov/rest/home.html","co":"NLM (NIH)","f":"Free w/ UMLS license + API key","p":"n/a","b":"Cross-vocabulary concept mapping (CUIs)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USPSTF Prevention TaskForce API","u":"https://www.uspreventiveservicestaskforce.org/apps/api.jsp","co":"Uspreventiveservicestaskforce","f":"Free w/ approval (email request for API key)","p":"n/a","b":"Clinical preventive service recommendations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"WHO ICD-11 ICD-API","u":"https://icd.who.int/icdapi","co":"WHO","f":"Free w/ registration (OAuth client id/secret)","p":"n/a","b":"Official ICD-11/ICD-10 disease classification","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"}]},{"category":"Mining, Metals & Commodities","count":27,"entries":[{"n":"API Ninjas Commodity Price API","u":"https://api-ninjas.com/api/commodityprice","co":"Api ninjas","f":"Free w/ key, rotating commodities, delayed","p":"approx $9.99/mo","b":"Simple commodity & futures quotes for prototypes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"British Geological Survey World Mineral Statistics","u":"https://ogcapi.bgs.ac.uk/collections/world-mineral-statistics","co":"Bgs","f":"Free, keyless (OGC API Features, JSON)","p":"n/a","b":"Global production & trade, 70+ commodities 1970-2022","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Commodities-API","u":"https://commodities-api.com/","co":"Commodities api","f":"Free w/ key, limited monthly quota","p":"approx $9.99/mo","b":"Real-time & historical prices, 170+ currencies","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CommodityPriceAPI","u":"https://commoditypriceapi.com/","co":"Commoditypriceapi","f":"Free trial w/ key (no card)","p":"Lite/Plus/Premium paid plans","b":"130+ commodities incl WTI, Brent, gold, silver","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EIA Coal Data API","u":"https://www.eia.gov/opendata/","co":"U.S. EIA","f":"Free w/ key, generous limits","p":"n/a","b":"Coal mine-level production, capacity, productivity","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FRED (commodity & metals price series)","u":"https://fred.stlouisfed.org/categories/32217","co":"FRED (St. Louis Fed)","f":"Free w/ key","p":"n/a","b":"IMF global metals index, PPI metals time-series","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Gold-Feed.com","u":"https://gold-feed.com/","co":"Gold feed","f":"Free tier available (XML/JSON feed)","p":"paid plans available","b":"Gold, silver, platinum, palladium feed XML/JSON","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GoldAPI.io","u":"https://www.goldapi.io/","co":"Goldapi","f":"Free w/ key, limited monthly quota","p":"approx $24/mo","b":"Real-time gold, silver, platinum, palladium spot","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GoldPricez","u":"https://goldpricez.com/about/api","co":"Goldpricez","f":"Free w/ key, 30-60 req/hour","p":"n/a","b":"Live gold & silver rates, many currencies & units","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IMF Primary Commodity Prices","u":"https://www.imf.org/en/Research/commodity-prices","co":"IMF","f":"Free, keyless (Excel/data downloads)","p":"n/a","b":"Monthly global metals, energy, food price indices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"MetalpriceAPI","u":"https://metalpriceapi.com/","co":"Metalpriceapi","f":"Free w/ key, 100 req/mo","p":"approx $9.99/mo","b":"Precious metals rates plus FX conversion","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Metals-API","u":"https://www.metals-api.com/","co":"Metals api","f":"Free w/ key, ~50-100 req/mo","p":"approx $9.99/mo","b":"Precious & base metals rates, historical data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Metals.dev","u":"https://metals.dev/docs","co":"Metals","f":"Free w/ key (no card), ~60s delay","p":"approx $1.49/mo entry","b":"Spot prices precious & industrial metals","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MSHA Mine Data Retrieval System","u":"https://www.msha.gov/data-and-reports/mine-data-retrieval-system","co":"Msha","f":"Free, keyless (flat files)","p":"n/a","b":"US mine permits, ownership, violations, production","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MSHA Open Data (data.gov)","u":"https://catalog.data.gov/dataset/msha-mines-dataset","co":"Data.gov","f":"Free, keyless via Socrata API","p":"n/a","b":"Mines, inspections, accidents, employment datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Nasdaq Data Link (Quandl)","u":"https://data.nasdaq.com/tools/api","co":"Nasdaq","f":"Free w/ key for free datasets","p":"premium datasets priced individually","b":"Free LBMA, metals & commodity time-series datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Natural Resources Canada - Minerals & Metals Facts","u":"https://natural-resources.canada.ca/minerals-mining/mining-data-statistics-analysis/minerals-metals-facts","co":"Government of Canada","f":"Free, keyless (statistical data)","p":"n/a","b":"Canadian mineral production, trade, reserves stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Oil Price API","u":"https://www.oilpriceapi.com/","co":"Oilpriceapi","f":"Free forever w/ key, 20 req/hour","p":"paid plans available","b":"Energy & commodity prices, webhooks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Twelve Data Commodities API","u":"https://twelvedata.com/commodities","co":"Twelvedata","f":"Free w/ key, 800 req/day","p":"approx $12/mo","b":"Real-time & historical commodity quotes/charts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UN Comtrade API","u":"https://comtradeplus.un.org/","co":"United Nations","f":"Free w/ key, public rate-limited tier","p":"premium subscription available","b":"Global trade flows incl ores, metals, fuels by HS code","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA NASS Quick Stats API","u":"https://quickstats.nass.usda.gov/api/","co":"U.S. USDA","f":"Free w/ key","p":"n/a","b":"US ag commodity prices received & production","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USGS Mineral Commodity Summaries","u":"https://www.usgs.gov/centers/national-minerals-information-center/mineral-commodity-summaries","co":"USGS","f":"Free, keyless (annual data release)","p":"n/a","b":"Annual salient stats, prices, net import reliance","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Mineral Resources Data System (MRDS)","u":"https://mrdata.usgs.gov/mrds/","co":"USGS","f":"Free, keyless (WMS/WFS, files)","p":"n/a","b":"Geospatial global mineral deposits & occurrences","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Mineral Resources Online Spatial Data","u":"https://mrdata.usgs.gov/","co":"USGS","f":"Free, keyless (OGC WMS/WFS/WMTS)","p":"n/a","b":"Geochemistry, geophysics, mineral spatial layers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS National Minerals Information Center","u":"https://www.usgs.gov/centers/national-minerals-information-center/data","co":"USGS","f":"Free, keyless (CSV/data files)","p":"n/a","b":"US & world production stats, 90+ nonfuel minerals","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Westmetall LME Market Data","u":"https://www.westmetall.com/en/markdaten.php","co":"Westmetall","f":"Free, keyless (HTML tables)","p":"n/a","b":"LME copper, tin, lead, zinc, aluminium, nickel","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"World Bank Commodity Price Data (Pink Sheet)","u":"https://www.worldbank.org/en/research/commodity-markets","co":"World Bank","f":"Free, keyless (Excel/PDF downloads)","p":"n/a","b":"Monthly global metals, energy, ag benchmark prices","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Model & dataset registries","count":24,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless query API (Atom) + OAI-PMH bulk metadata","p":"n/a","b":"ML/AI preprint metadata and abstracts underlying models","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"AWS Open Data Registry","u":"https://registry.opendata.aws/","co":"Opendata","f":"Free, keyless public S3 datasets + machine-readable YAML/JSON index on GitHub","p":"n/a","b":"Large public ML datasets hosted on S3 (e.g. Common Crawl)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Civitai REST API (v1)","u":"https://developer.civitai.com/site/reference/","co":"Civitai","f":"Free, mostly keyless for browse (models, versions, images, creators, tags)","p":"n/a (key for downloads/permissions)","b":"Stable Diffusion checkpoints, LoRAs, image-gen model registry","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"data.world API","u":"https://apidocs.data.world/","co":"Data","f":"Free community tier w/ login/token; community datasets, projects, catalog","p":"Paid enterprise plans","b":"Hosted/shared datasets with SQL query and catalog API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Dataverse Native API","u":"https://guides.dataverse.org/en/latest/api/native-api.html","co":"Dataverse","f":"Free, keyless search/read on public installs (e.g. Harvard Dataverse)","p":"n/a","b":"Institutional research data repositories with citation metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"figshare API","u":"https://docs.figshare.com/","co":"Figshare","f":"Free, keyless public search/read of articles & datasets (DOI-backed)","p":"n/a (token for upload/private)","b":"DOI-cited research datasets, figures, and model artifacts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GitHub Models","u":"https://docs.github.com/en/github-models","co":"En","f":"Free w/ GitHub token; rate-limited model catalog + inference","p":"Paid via Azure for production scale","b":"Browse and prototype against a curated model catalog","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Groq Models API","u":"https://console.groq.com/docs/api-reference","co":"Groq","f":"Free w/ key; GET /openai/v1/models lists hosted open models","p":"Pay-as-you-go per token","b":"Fast-inference catalog of open LLMs (Llama, Mixtral, etc.)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hugging Face Dataset Viewer API","u":"https://huggingface.co/docs/dataset-viewer/index","co":"Hugging Face","f":"Free, keyless for public datasets (/rows, /splits, /first-rows)","p":"n/a (token only for gated/private)","b":"Preview/stream dataset rows and splits without download","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Hugging Face Hub API","u":"https://huggingface.co/docs/hub/en/api","co":"Hugging Face","f":"Free, keyless for public read (list/search models, datasets, Spaces)","p":"PRO $9/mo; Enterprise Hub from $20/user/mo","b":"Largest open model & dataset registry metadata/search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Kaggle API (datasets, models, competitions)","u":"https://www.kaggle.com/docs/api","co":"Kaggle","f":"Free w/ key (kaggle.json token); public datasets, models, competitions","p":"n/a","b":"Download/list Kaggle datasets, models, competition data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"kagglehub","u":"https://github.com/Kaggle/kagglehub","co":"Kaggle","f":"Free w/ key; Python access to Kaggle models/datasets/notebook outputs","p":"n/a","b":"Programmatic Kaggle resource downloads (incl. TF Hub models)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ModelScope Hub API","u":"https://github.com/modelscope/modelscope","co":"Modelscope","f":"Free, keyless model/dataset hub browse & download (Qwen, Wan, etc.)","p":"n/a","b":"Alibaba/Chinese open model & dataset registry (Qwen home)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"npm registry API","u":"https://github.com/npm/registry/blob/master/docs/REGISTRY-API.md","co":"Npm","f":"Free, keyless package metadata/search","p":"n/a","b":"Package registry (incl. huggingface.js, ML SDK tooling)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NVIDIA NGC / API Catalog","u":"https://build.nvidia.com/","co":"Nvidia","f":"Free w/ key; trial credits for NIM/model endpoints","p":"Paid via NVIDIA AI Enterprise/cloud","b":"NVIDIA-optimized models, NIM microservices, datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ollama Registry / Library","u":"https://ollama.com/library","co":"Ollama","f":"Free, keyless model registry; pull via OCI registry.ollama.com; local /api/tags","p":"n/a","b":"Discover and pull local-run LLM/GGUF model tags","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenML REST API","u":"https://docs.openml.org/ecosystem/Rest/","co":"Openml","f":"Free, keyless read (/data, /task, /flow, /run); JSON or XML","p":"n/a (key for upload)","b":"Open ML datasets, tasks, flows, and reproducible experiments","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenRouter Models API","u":"https://openrouter.ai/docs/api/api-reference/models/get-models","co":"OpenRouter","f":"Free, keyless GET /api/v1/models metadata listing; :free model IDs","p":"Pay-as-you-go credits per token","b":"Unified catalog/metadata of 300+ LLMs and pricing","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PyPI JSON API","u":"https://docs.pypi.org/api/json/","co":"Pypi","f":"Free, keyless package metadata (huggingface_hub, transformers, etc.)","p":"n/a","b":"Python package registry for ML/AI libraries","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Replicate API","u":"https://replicate.com/docs","co":"Replicate","f":"Free trial credits; keyless model metadata browse on site","p":"Pay-as-you-go per-second/per-output, no minimum","b":"Run/host community ML models via hosted inference API","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"Roboflow Universe API","u":"https://docs.roboflow.com/","co":"Roboflow","f":"Free tier w/ key; large library of CV datasets and models","p":"Paid plans for higher inference/usage","b":"Computer-vision datasets and fine-tuned model registry/APIs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free, keyless shared tier; free key for dedicated 1 RPS limit","p":"n/a","b":"Paper/citation graph and datasets behind ML research","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Together AI Models API","u":"https://docs.together.ai/reference/models-1","co":"Together AI","f":"Free signup credits; keyed GET /v1/models list endpoint","p":"Pay-as-you-go per token/per-second","b":"Open-model serving catalog and hosted inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Zenodo API","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free, keyless search/read of records & datasets (DOI-backed)","p":"n/a (token for deposit)","b":"DOI-cited research datasets, software, and model artifacts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Multimodal generation APIs (image/audio/video/speech)","count":31,"entries":[{"n":"AssemblyAI","u":"https://www.assemblyai.com/pricing","co":"Assemblyai","f":"$50 free credits (~333 hrs at $0.15/hr), no card","p":"Universal $0.15/hr ($0.0025/min) batch","b":"Affordable STT with diarization, audio intelligence","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cartesia (Sonic TTS)","u":"https://www.cartesia.ai/pricing","co":"Cartesia","f":"Free, ~20K credits/mo (~20K chars, ~15-20 min audio), no card","p":"Pro plan (adds voice cloning); usage-based per character","b":"Low-latency real-time TTS for voice agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cohere Embed API","u":"https://cohere.com/embeddings","co":"Cohere","f":"Free trial key, 1000 calls/month (non-production)","p":"Embed v4 $0.12/1M text tokens; $0.47/1M image tokens","b":"Production text/multimodal embeddings, reranking","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Deepgram","u":"https://deepgram.com/pricing","co":"Deepgram","f":"$200 free credits (~26k min Nova-3), no card, no expiry","p":"Nova-3 $0.0077/min (~$0.46/hr) monolingual","b":"High-accuracy STT + TTS + voice agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DeepInfra","u":"https://deepinfra.com/pricing","co":"Deepinfra","f":"Free credits on signup; DeepStart up to 1B tokens","p":"From $0.02-1.50/1M tokens; per-image for image models","b":"Cheap OpenAI-compatible open-model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ElevenLabs TTS API","u":"https://elevenlabs.io/pricing/api","co":"Elevenlabs","f":"Free, 10k characters/month (~10 min), non-commercial","p":"Starter $5/mo (30k chars, commercial rights, voice cloning)","b":"High-quality TTS and voice cloning","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"fal.ai","u":"https://fal.ai/pricing","co":"Fal","f":"$20 free credit on signup (business email)","p":"FLUX schnell $0.003/MP; video $0.05-0.40/sec","b":"Fast serverless image/video (FLUX, SD, Wan, Kling, Sora)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Fireworks AI","u":"https://fireworks.ai/pricing","co":"Fireworks AI","f":"$1 free credits on signup","p":"Flux Pro $0.04/image; SDXL $0.013/image","b":"Fast serverless FLUX/SDXL + LLM inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Gladia","u":"https://www.gladia.io/pricing","co":"Gladia","f":"Free tier, up to 10 hrs transcription/month, all features","p":"Starter $0.61/hr async; Growth from $0.20/hr","b":"Whisper-based STT backbone for voice apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google Gemini API (AI Studio)","u":"https://ai.google.dev/gemini-api/docs/pricing","co":"Google","f":"Free w/ key; Gemini Flash Image ~500 req/day, Imagen 2 img/min free","p":"Imagen/Gemini image pay-as-you-go per image; tiered RPM upgrades","b":"Multimodal text+image gen with real free tier","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Groq (Whisper/audio)","u":"https://console.groq.com/docs/speech-to-text","co":"Groq","f":"Free, 2000 transcription requests/day, no card","p":"Whisper Large v3 Turbo $0.04/hr; Large v3 $0.111/hr","b":"Ultra-fast Whisper speech-to-text serving","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hugging Face Inference Providers","u":"https://huggingface.co/docs/inference-providers/index","co":"Hugging Face","f":"Free w/ key, ~$0.10/mo inference credits (text-to-image, Whisper, embeddings)","p":"PRO $9/mo ($2/mo credits, 20x); then pay-as-you-go to providers","b":"Unified API to many open models, all modalities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Jina AI Embeddings","u":"https://jina.ai/embeddings/","co":"Jina","f":"Free, 10M tokens with auto-generated key","p":"jina-embeddings-v3 $0.02/1M tokens","b":"Open multilingual/multimodal embedding endpoints","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lemonfox.ai (Whisper API)","u":"https://www.lemonfox.ai/whisper-api","co":"Lemonfox","f":"Free 1-month trial; then $5/mo includes 30 hrs","p":"$0.50 per 3 hrs (~$0.17/hr) beyond included","b":"Very cheap Whisper-based transcription API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Leonardo.Ai API","u":"https://leonardo.ai/api","co":"Leonardo","f":"$5 free API credit on signup","p":"API Basic $9/mo (3,500 credits); pay-as-you-go top-ups","b":"Stylized image + video generation API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Modal","u":"https://modal.com/pricing","co":"Modal","f":"$30/month free compute credits (Starter)","p":"Per-second GPU; H100 SXM ~$4.29/hr, A10G/T4 ~$1.10/hr","b":"Python-native serverless GPU for SD/Whisper/TTS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Novita AI","u":"https://novita.ai/pricing","co":"Novita","f":"Free $0.50 credits for new users; pay-as-you-go","p":"From $0.0015/image (base models)","b":"200+ models, image/audio/video + LoRAs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PlayHT (Play.ht) TTS API","u":"https://play.ht/","co":"Play","f":"Free plan (~5k words/mo, non-commercial, attribution)","p":"Professional ~$31.20/mo (annual) adds API access","b":"Realistic TTS voices, voice cloning via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Pollinations AI","u":"https://pollinations.ai/","co":"Pollinations","f":"Free, keyless URL-based image/text/audio gen (FLUX); 1 req/15s anon","p":"Pollen credits for premium models / higher limits","b":"Zero-config keyless image/text/audio generation","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Replicate","u":"https://replicate.com/docs","co":"Replicate","f":"Limited free runs on curated models; pay-per-run after","p":"~$0.003-0.04/image; GPU $0.000025-0.001525/sec","b":"Hosting/running open SD, video, audio models via API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Segmind","u":"https://www.segmind.com/pricing","co":"Segmind","f":"Free tier + pay-as-you-go credits (some free serverless models)","p":"Per-second serverless inference (per-model)","b":"Serverless SD/FLUX models + image workflows","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Speechmatics","u":"https://www.speechmatics.com/pricing","co":"Speechmatics","f":"Free, 8 hrs/month (4 batch + 4 real-time), no card","p":"Pro from $0.24/hr","b":"Accurate multilingual real-time/batch STT","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stability AI API","u":"https://platform.stability.ai/docs/api-reference","co":"Stability","f":"25 free credits on signup","p":"Core $0.03/img; SD3.5 $0.065; Ultra $0.08/img (1 credit=$0.01)","b":"Official Stable Diffusion / SD3.5 image generation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Together AI","u":"https://www.together.ai/pricing","co":"Together AI","f":"$25 free credits on signup; OpenAI-compatible","p":"FLUX ~$0.025/MP (~$0.026/1024px img); embeddings/rerank metered separately","b":"OpenAI-compatible open image/embeddings/video serving","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Voyage AI Embeddings","u":"https://docs.voyageai.com/docs/pricing","co":"Voyageai","f":"Free, up to 200M tokens (newer models) per account","p":"voyage-4 $0.06/1M; voyage-4-large $0.12/1M","b":"High-accuracy retrieval embeddings for RAG","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Black Forest Labs (FLUX) API","u":"https://docs.bfl.ai/quick_start/pricing","co":"Bfl","f":"none (credit-based, 1 credit = $0.01)","p":"FLUX.1.1 Pro 4 credits/img ($0.04); FLUX.2 megapixel-based","b":"Official FLUX text-to-image and Kontext editing","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Ideogram API","u":"https://ideogram.ai/features/api-pricing","co":"Ideogram","f":"none for API (web free plan exists)","p":"v3 Turbo $0.03/img; Quality $0.09/img","b":"Text-in-image and typographic generation","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Luma Dream Machine API","u":"https://docs.lumalabs.ai/docs/welcome","co":"Lumalabs","f":"none for API (consumer app has free credits)","p":"From ~$0.32 per generation (credit-based)","b":"Text/image-to-video generation (Ray models)","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"OpenAI Audio/Image API","u":"https://platform.openai.com/docs/pricing","co":"OpenAI","f":"none (pay-as-you-go)","p":"Whisper $0.006/min; TTS $15/1M chars; images from $0.04","b":"Whisper STT, TTS, GPT-image/DALL-E generation","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"},{"n":"Recraft API","u":"https://www.recraft.ai/docs/api-reference/pricing","co":"Recraft","f":"none for API (web 50 daily credits free plan)","p":"Recraft V3 raster $0.04/img; vector $0.08/img","b":"Vector art, brand-style, design-first images","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"RunPod Serverless","u":"https://docs.runpod.io/serverless/pricing","co":"Runpod","f":"none (pay-per-second, no minimum)","p":"H100 serverless ~$0.00053/sec (~$1.91/hr) + cold-start","b":"Self-deploy ComfyUI/SD/Whisper on serverless GPU","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Neuroscience","count":28,"entries":[{"n":"Allen Brain Atlas API (RMA)","u":"https://brain-map.org/support/documentation/restful-model-access-rma","co":"Brain map","f":"Free, keyless","p":"n/a","b":"Mouse/human brain atlases, gene expression, connectivity, cell types","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Allen Brain Cell Atlas (ABC Atlas) / abc_atlas_access","u":"https://alleninstitute.github.io/abc_atlas_access/intro.html","co":"Alleninstitute","f":"Free, keyless (AWS S3 + Python SDK)","p":"n/a","b":"Whole-brain single-cell transcriptomic and spatial cell-type atlas","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Allen Cell Types Database (Allen SDK/API)","u":"https://celltypes.brain-map.org/","co":"Brain map","f":"Free, keyless","p":"n/a","b":"Single-cell electrophysiology, morphology, transcriptomics and models","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"BossDB API","u":"https://bossdb.org/","co":"Bossdb","f":"Free w/ token (intern Python SDK)","p":"n/a","b":"Petascale volumetric EM connectomics imaging and segmentation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Brain Image Library (BIL) metadata API","u":"https://www.brainimagelibrary.org/metadataapi.html","co":"Brainimagelibrary","f":"Free, keyless","p":"n/a","b":"High-resolution optical microscopy brain imaging datasets search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"brainlife.io API","u":"https://brainlife.io/docs/","co":"Brainlife","f":"Free w/ account","p":"n/a","b":"Cloud MRI/EEG/MEG dataset import, pipelines, reproducible analysis","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DANDI Archive API","u":"https://docs.dandiarchive.org/","co":"Dandiarchive","f":"Free, keyless (read); key for upload","p":"n/a","b":"NWB neurophysiology, ephys, optophysiology datasets streaming","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EBRAINS siibra-api (Human Brain Atlas)","u":"https://www.ebrains.eu/brain-atlases/apis/","co":"Ebrains","f":"Free, keyless HTTP API","p":"n/a","b":"Multilevel human brain parcellations, probabilistic maps, region datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FlyWire / CAVE (CAVEclient + codex downloads)","u":"https://codex.flywire.ai/api/download","co":"Flywire","f":"Free w/ account token","p":"n/a","b":"Whole fly brain connectome segmentation, synapses, annotations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Human Connectome Project ConnectomeDB (XNAT API)","u":"https://db.humanconnectome.org/","co":"Humanconnectome","f":"Free w/ account (data use terms)","p":"n/a","b":"HCP MRI/dMRI/fMRI human connectome datasets via XNAT REST","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ModelDB","u":"https://modeldb.science/","co":"Modeldb","f":"Free, keyless","p":"n/a","b":"Published computational neuroscience model source code repository","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NEMAR.org (NeuroElectroMagnetic archive)","u":"https://nemar.org/","co":"Nemar","f":"Free, keyless","p":"n/a","b":"EEG/MEG/iEEG BIDS datasets mirrored from OpenNeuro with compute","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"neuPrint (Janelia FlyEM) API","u":"https://neuprint.janelia.org/","co":"Janelia","f":"Free w/ login token","p":"n/a","b":"Drosophila connectome graph queries via Neo4j/REST","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NeuroElectro REST API","u":"https://neuroelectro.org/api/docs","co":"Neuroelectro","f":"Free, keyless","p":"n/a","b":"Curated neuron electrophysiology properties by cell type","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NeuroMorpho.Org API","u":"https://neuromorpho.org/apiReference.html","co":"Neuromorpho","f":"Free, keyless","p":"n/a","b":"Digital neuron morphology reconstructions and morphometrics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NeuroQuery API","u":"https://neuroquery.org/","co":"Neuroquery","f":"Free, keyless","p":"n/a","b":"Predictive coordinate-based meta-analysis brain maps from text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Neuroscience Information Framework (NIF/SciCrunch) API","u":"https://scicrunch.org/api/","co":"Scicrunch","f":"Free w/ key","p":"n/a","b":"Federated search across neuroscience databases and ontologies","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Neurosynth / Neurosynth-Compose (NeuroStore API)","u":"https://neurostuff.github.io/compose-docs/","co":"Neurostuff","f":"Free, keyless (data + API)","p":"n/a","b":"Large-scale fMRI coordinate meta-analysis and term decoding","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NeuroVault REST API","u":"https://neurovault.org/api/","co":"Neurovault","f":"Free, keyless (read)","p":"n/a","b":"Unthresholded fMRI/PET statistical brain maps and atlases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIMH Data Archive (NDA) API","u":"https://nda.nih.gov/","co":"NIH","f":"Free w/ credentialed access (DUA required)","p":"n/a","b":"Mental health/autism (ABIDE, ABCD) neuroimaging and clinical data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NITRC (Neuroimaging Tools & Resources Collaboratory)","u":"https://www.nitrc.org/","co":"Nitrc","f":"Free, keyless","p":"n/a","b":"Registry of neuroimaging tools, datasets, and computing resources","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Source Brain","u":"https://www.opensourcebrain.org/","co":"Opensourcebrain","f":"Free, keyless (public models)","p":"n/a","b":"Standardized NeuroML neuron and circuit computational models","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenfMRI (legacy)","u":"https://legacy.openfmri.org/","co":"Openfmri","f":"Free, keyless","p":"n/a","b":"Legacy raw fMRI datasets (migrated to OpenNeuro)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenNeuro GraphQL API","u":"https://docs.openneuro.org/api.html","co":"Openneuro","f":"Free, keyless (read); key for uploads","p":"n/a","b":"BIDS MRI/fMRI/EEG/MEG/iEEG/PET dataset search and download","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PhysioNet","u":"https://physionet.org/","co":"Physionet","f":"Free, keyless (some restricted require credentialing)","p":"n/a","b":"Physiological signals incl. EEG/ECG, WFDB toolkit access","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Scalable Brain Atlas (INCF) web services","u":"https://scalablebrainatlas.incf.org/","co":"Incf","f":"Free, keyless","p":"n/a","b":"Multi-species interactive brain atlases and region ontology mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SPARC / Pennsieve API","u":"https://docs.pennsieve.io/","co":"Pennsieve","f":"Free, keyless (public REST/discover); key for management","p":"n/a","b":"Peripheral nervous system and neuromodulation datasets/protocols","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TUH EEG Corpus (Temple/NEDC)","u":"https://isip.piconepress.com/projects/tuh_eeg/","co":"Piconepress","f":"Free on request (registration/credentials)","p":"n/a","b":"Largest clinical EEG corpus for seizure/abnormal EEG ML","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Nutrition, food composition & restaurant inspection","count":27,"entries":[{"n":"ANSES CIQUAL French Food Composition Table","u":"https://ciqual.anses.fr/","co":"Anses","f":"Free, keyless OpenData (Excel/XML download)","p":"n/a","b":"French national food composition reference (3,400+ foods)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"API Ninjas Nutrition API","u":"https://api-ninjas.com/api/nutrition","co":"Api ninjas","f":"Free w/ key (rate-limited, no commercial use)","p":"Paid premium tiers (Developer plan up)","b":"NLP nutrition extraction for 100k+ foods/drinks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"API Ninjas Recipe API","u":"https://api-ninjas.com/api/recipe","co":"Api ninjas","f":"Free w/ key (rate-limited; 1 result/call on free)","p":"Paid premium tiers (Developer plan up)","b":"Recipe lookup (200k+) with ingredients & nutrition","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CalorieNinjas Nutrition API","u":"https://calorieninjas.com/api","co":"Calorieninjas","f":"Free w/ key, up to 10,000 calls/mo (non-commercial)","p":"Paid up to ~$49/mo (2M calls, commercial)","b":"NLP nutrition extraction from text/image for 100k+ foods","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Chicago Food Inspections (Socrata)","u":"https://data.cityofchicago.org/Health-Human-Services/Food-Inspections/4ijn-s7e5","co":"Cityofchicago","f":"Free, keyless (Socrata app token raises limits)","p":"n/a","b":"Chicago food establishment inspection results since 2010","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Edamam Food Database API","u":"https://developer.edamam.com/food-database-api","co":"Edamam","f":"Limited free Developer/Basic tier w/ key (trial-oriented)","p":"Enterprise Basic from ~$14/mo (100k calls/mo)","b":"Food/ingredient lookup with nutrition per measure","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Edamam Nutrition Analysis API","u":"https://developer.edamam.com/edamam-nutrition-api","co":"Edamam","f":"Limited free Developer/Basic tier w/ key (trial-oriented)","p":"Enterprise Basic from ~$14/mo (10-day trial)","b":"NLP ingredient parsing, 25+ nutrients, diet labels","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Edamam Recipe Search API","u":"https://developer.edamam.com/edamam-recipe-api","co":"Edamam","f":"Limited free Developer/Basic tier w/ key (trial-oriented)","p":"Enterprise plans from ~$14/mo (usage based)","b":"2M+ recipe search with nutrition & diet filters","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FatSecret Platform API","u":"https://platform.fatsecret.com/platform-api","co":"Fatsecret","f":"Free Basic tier w/ key (rate-limited)","p":"Premier paid (contact sales)","b":"Large global branded/restaurant foods, recipes & diary","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FoodSafety.gov Recalls (RSS/Widget feed)","u":"https://www.foodsafety.gov/recalls-and-outbreaks","co":"Foodsafety","f":"Free, keyless RSS/embed widget feed","p":"n/a","b":"Combined FDA+USDA+CDC food recall & outbreak feed","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Frida (Danish Food Composition DB, DTU)","u":"https://frida.fooddata.dk/?lang=en","co":"Fooddata","f":"Free, keyless spreadsheet export (form to get link)","p":"n/a","b":"Danish national food composition reference data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Nutritionix API","u":"https://www.nutritionix.com/api","co":"Nutritionix","f":"No public free tier (legacy 'Hacker' plan discontinued)","p":"Starter ~$299/mo; Enterprise from ~$1,850/mo","b":"Restaurant menu items & natural-language nutrition","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"NYC DOHMH Restaurant Inspections (Socrata)","u":"https://data.cityofnewyork.us/Health/DOHMH-New-York-City-Restaurant-Inspection-Results/43nn-pn8j","co":"Cityofnewyork","f":"Free, keyless (Socrata app token raises limits)","p":"n/a","b":"NYC restaurant inspection grades & violations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Food Facts API","u":"https://openfoodfacts.github.io/openfoodfacts-server/api/","co":"Openfoodfacts","f":"Free, keyless; open collaborative DB","p":"n/a","b":"Global crowdsourced packaged-food barcodes & nutrition","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openFDA Food Adverse Events (CAERS)","u":"https://open.fda.gov/apis/food/event/","co":"openFDA","f":"Free, keyless (optional key raises limits)","p":"n/a","b":"Adverse events from foods, supplements & cosmetics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Food Enforcement (Recalls)","u":"https://open.fda.gov/apis/food/enforcement/","co":"openFDA","f":"Free, keyless (240 req/min, 120k/day w/ key)","p":"n/a","b":"FDA food recall enforcement reports since 2004","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Spoonacular API","u":"https://spoonacular.com/food-api","co":"Spoonacular","f":"Free w/ key, 150 requests/day (point-based)","p":"Pro ~$29/mo (1,500 req/day); $10/mo academic","b":"Recipes, meal planning, ingredient & product data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Suggestic API (incl. NutriGraph food data)","u":"https://suggestic.com/api.html","co":"Suggestic","f":"30-day free developer trial (no permanent free tier)","p":"Paid plans (contact sales)","b":"GraphQL recipes, meal plans, food graph & restaurant menus","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TheCocktailDB API","u":"https://www.thecocktaildb.com/api.php","co":"Thecocktaildb","f":"Free dev key '1' (must be in request URL)","p":"Premium one-off ~$10 (PayPal) for prod key","b":"Open cocktail/drink recipe & ingredient database","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TheMealDB API","u":"https://www.themealdb.com/api.php","co":"Themealdb","f":"Free dev key '1' (must be in request URL)","p":"Supporter (Patreon/PayPal) ~$2-3/mo for prod key","b":"Open recipe/meal database with images","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USDA FNS Child Nutrition Database (CNDB)","u":"https://fdc.nal.usda.gov/cndb/","co":"U.S. USDA","f":"Free, keyless public dataset","p":"n/a","b":"Nutrient data for foods served in child nutrition programs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FoodData Central API","u":"https://fdc.nal.usda.gov/api-guide/","co":"U.S. USDA","f":"Free w/ data.gov key, 1,000 req/hr; DEMO_KEY 30/hr","p":"n/a","b":"Authoritative US food composition, ~300k branded & SR foods","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA FoodData Central Downloadable Datasets","u":"https://fdc.nal.usda.gov/download-datasets/","co":"U.S. USDA","f":"Free, keyless bulk download (CC0, CSV/JSON)","p":"n/a","b":"Bulk public-domain US food composition data dumps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FoodData Central FNDDS / Foundation Foods (data type)","u":"https://fdc.nal.usda.gov/download-datasets/","co":"U.S. USDA","f":"Free via FDC API key or keyless bulk download","p":"n/a","b":"Foundation/Survey (FNDDS) foods for dietary-intake studies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FoodKeeper Data","u":"https://catalog.data.gov/dataset/fsis-foodkeeper-data","co":"Data.gov","f":"Free, keyless data feed (XLS/JSON download)","p":"n/a","b":"Food storage & shelf-life guidance by product","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FSIS Establishments (MPI) API","u":"https://www.fsis.usda.gov/science-data/developer-resources/mpi-api","co":"U.S. USDA","f":"Free, keyless JSON","p":"n/a","b":"Federally inspected meat/poultry/egg plant directory","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA FSIS Recall API","u":"https://www.fsis.usda.gov/science-data/developer-resources/recall-api","co":"U.S. USDA","f":"Free, keyless JSON","p":"n/a","b":"Meat/poultry/egg recalls & public health alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Ocean, Marine & Fisheries","count":5,"entries":[{"n":"NASA PO.DAAC Earthdata","u":"https://podaac.jpl.nasa.gov/","co":"NASA","f":"Free w/ Earthdata login","p":"n/a","b":"Satellite SST, sea level, salinity, winds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Protected Planet WDPA API","u":"https://api.protectedplanet.net/documentation","co":"Protectedplanet","f":"Free w/ token","p":"n/a","b":"Marine protected areas, OECM boundaries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Stormglass.io Marine Weather API","u":"https://stormglass.io/","co":"Stormglass","f":"Free w/ key, ~10 req/day","p":"From ~$19/mo","b":"Waves, swell, currents, tides, water temp","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"WorldTides API","u":"https://www.worldtides.info/apidocs","co":"Worldtides","f":"Free w/ key, 100 credits","p":"Pay-per-credit","b":"Global tide heights and extremes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MarineTraffic API Services","u":"https://www.marinetraffic.com/en/online-services/single-ship-positions-api-service","co":"Marinetraffic","f":"none","p":"Paid credits/subscription","b":"Vessel positions, port calls, ETA data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Open access discovery","count":25,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless (Atom XML)","p":"n/a","b":"Open access preprints in physics, CS, math","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BASE (Bielefeld Academic Search Engine) API","u":"https://www.base-search.net/about/en/about_develop.php","co":"Base search","f":"Free for non-commercial; IP whitelist required","p":"License for commercial use","b":"Index of 400M+ repository/journal documents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"bioRxiv / medRxiv API","u":"https://api.biorxiv.org/","co":"bioRxiv","f":"Free, keyless","p":"n/a","b":"Open preprints in biology and health sciences","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CORE API (v3)","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key, rate-limited","p":"Paid plans for higher throughput","b":"Aggregated OA full texts from repositories","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless; polite pool with email","p":"Metadata Plus commercial tiers","b":"DOI scholarly metadata, licenses, funding","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless public API (CC0)","p":"Member account for create/update","b":"Research data and software DOI metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Dimensions Analytics API","u":"https://www.dimensions.ai/products/all-products/dimensions-api/","co":"Dimensions","f":"Free for approved non-commercial scientometrics research","p":"Paid commercial license","b":"Linked publications, grants, patents, clinical trials","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DOAB (Directory of Open Access Books) REST API","u":"https://www.doabooks.org/en/article/api-search-doab","co":"Doabooks","f":"Free, keyless; OAI-PMH also","p":"n/a","b":"Discover peer-reviewed open access books","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DOAJ (Directory of Open Access Journals) API","u":"https://doaj.org/api/v4/docs","co":"DOAJ","f":"Free, keyless for search/lookup","p":"n/a","b":"Search vetted open access journals and articles","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Europe PMC REST API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Life-science literature, full text, OA filter","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Fatcat / Internet Archive Scholar API","u":"https://api.fatcat.wiki/redoc","co":"Fatcat","f":"Free, keyless read; key for editing","p":"n/a","b":"Bibliographic catalog with archived full-text links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Lens.org Scholarly API","u":"https://docs.api.lens.org/","co":"Lens.org","f":"14-day trial tokens; non-commercial academic on request","p":"Paid commercial/institutional subscriptions","b":"Scholarly works linked to patent citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"OA.Works / ShareYourPaper Permissions API","u":"https://shareyourpaper.org/permissions/about","co":"Shareyourpaper","f":"Free, open REST JSON API and dataset","p":"n/a","b":"Self-archiving permissions checking by DOI","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/","co":"OpenAIRE","f":"Free; registration/token for higher limits","p":"n/a","b":"EU open science graph: products, projects, funders","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless; polite pool via email","p":"Premium plan for high volume","b":"Open catalog of works, authors, institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenDOAR API","u":"https://v2.sherpa.ac.uk/opendoar/api.html","co":"Sherpa","f":"Free w/ key (Sherpa v2 API key)","p":"n/a","b":"Registry/directory of OA repositories","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OSF (Open Science Framework) API v2","u":"https://developer.osf.io/","co":"Osf","f":"Free; public reads keyless, token for private/write","p":"n/a","b":"Open projects, preprints, files and registrations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PubMed Central OA Web Service / OAI-PMH","u":"https://pmc.ncbi.nlm.nih.gov/tools/oa-service/","co":"NCBI (NIH)","f":"Free, keyless","p":"n/a","b":"Query PMC open access subset PDFs/packages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PubMed E-utilities (NCBI Entrez) API","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless (3 rps); free key raises to 10 rps","p":"n/a","b":"Search/fetch biomedical literature metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ROAR (Registry of Open Access Repositories)","u":"https://roar.eprints.org/","co":"Eprints","f":"Free; OAI-PMH (cgi/oai2) and rawlist.xml exports","p":"n/a","b":"Registry tracking OA repository growth","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ROR (Research Organization Registry) API","u":"https://ror.readme.io/","co":"Readme","f":"Free, keyless (CC0)","p":"n/a","b":"Persistent IDs and metadata for research institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free, keyless shared limit; free key for more","p":"n/a","b":"Papers, citations, embeddings, open data graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SHERPA Romeo API","u":"https://v2.sherpa.ac.uk/api/","co":"Sherpa","f":"Free w/ key (Sherpa account API key)","p":"n/a","b":"Publisher OA self-archiving and copyright policies","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free, no key (email param), 100k/day","p":"Paid data feed/snapshot for high volume","b":"Find legal OA full-text version by DOI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Zenodo REST API","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free; read keyless, write needs token","p":"n/a","b":"Open research outputs, datasets, software DOIs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Open agent protocols & interop","count":28,"entries":[{"n":"Agent Communication Protocol (ACP) — IBM/BeeAI","u":"https://agentcommunicationprotocol.dev/introduction/welcome","co":"Agentcommunicationprotocol","f":"Free, open REST spec (Linux Foundation); BeeAI reference impl","p":"n/a","b":"REST-based agent messaging across frameworks/runtimes","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Agent Network Protocol (ANP)","u":"https://agent-network-protocol.com/","co":"Agent network protocol","f":"Free, open spec; W3C DID identity + agent description, keyless","p":"n/a","b":"Decentralized agent identity, discovery, encrypted comms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Agent Payments Protocol (AP2) — Google","u":"https://cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol","co":"Google Cloud","f":"Free, open spec; W3C Verifiable Credentials Mandates, keyless","p":"n/a","b":"Authorized, accountable agent-initiated payments","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Agent2Agent (A2A) Protocol","u":"https://a2a-protocol.org/latest/","co":"A2a protocol","f":"Free, open spec (Linux Foundation); Agent Card JSON via .well-known","p":"n/a","b":"Cross-vendor agent-to-agent discovery and task delegation","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"agents.json (Wildcard AI)","u":"https://docs.wild-card.ai/agentsjson/introduction","co":"Wild card","f":"Free, open spec on top of OpenAPI; open-source Bridge package","p":"n/a","b":"Describing API contracts/flows for agent consumption","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"AGNTCY — Agent Connect Protocol (ACP) Spec","u":"https://github.com/agntcy/acp-spec","co":"Agntcy","f":"Free, open OpenAPI/REST spec, keyless","p":"n/a","b":"Standard REST interface to invoke/configure remote agents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AGNTCY — Agent Directory (dir)","u":"https://docs.agntcy.org/","co":"Agntcy","f":"Free, open-source distributed announce/discovery system","p":"n/a","b":"Distributed discovery of multi-agent systems","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"AGNTCY — Open Agentic Schema Framework (OASF)","u":"https://schema.oasf.agntcy.org/","co":"Agntcy","f":"Free, open schema + hosted schema server with validation, keyless","p":"n/a","b":"Standard schema for describing agent capabilities/metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Agora Protocol","u":"https://github.com/agora-protocol","co":"Agora protocol","f":"Free, open research project (Oxford); NL-to-protocol negotiation","p":"n/a","b":"Dynamic NL-negotiated agent communication protocols","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"AITP — Agent Interaction & Transaction Protocol (NEAR)","u":"https://aitp.dev/","co":"Aitp","f":"Free, open spec for cross-trust-boundary agent interaction","p":"n/a","b":"Agent payments, data sharing, UI across trust boundaries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Anthropic Claude Tool Use API","u":"https://docs.claude.com/en/docs/agents-and-tools/tool-use/overview","co":"Claude","f":"Free docs/schema; API usage paid","p":"Pay-per-token (model-dependent)","b":"input_schema JSON tool definitions for Claude agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Coral Protocol / CoralOS","u":"https://github.com/Coral-Protocol/coral-server","co":"Coral Protocol","f":"Free, open-source MCP-native runtime + agent registry","p":"n/a (Solana-settled agent payments, coming soon)","b":"Multi-agent messaging, discovery, and payments","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Docker MCP Catalog / Registry","u":"https://hub.docker.com/mcp","co":"Docker","f":"Free public catalog of containerized MCP servers, keyless browse","p":"Docker Hub paid plans","b":"Discovering/running containerized MCP servers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Glama MCP Registry API","u":"https://glama.ai/mcp/servers","co":"Glama","f":"Free public API (glama.ai/api/mcp/v1/servers/), 32k+ servers","p":"Paid gateway/hosting tiers","b":"Largest-coverage MCP server discovery via API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"JSON Schema (tool-definition standard)","u":"https://json-schema.org/","co":"Schema.org","f":"Free, open standard underpinning MCP/OpenAI/Claude tool schemas","p":"n/a","b":"Defining/validating tool parameter schemas","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"llms.txt standard","u":"https://llmstxt.org/","co":"Llmstxt","f":"Free, open markdown convention for AI-readable site content","p":"n/a","b":"Exposing site structure/docs to LLMs and agents","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LMOS Protocol (Eclipse Foundation)","u":"https://eclipse.dev/lmos/","co":"Eclipse","f":"Free, open spec; W3C WoT-based agent description/discovery","p":"n/a","b":"Web-of-things-style agent discovery and interop","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MCP Reference Servers (modelcontextprotocol/servers)","u":"https://github.com/modelcontextprotocol/servers","co":"Modelcontextprotocol","f":"Free, open-source reference MCP server implementations","p":"n/a","b":"Ready-made MCP connectors (filesystem, git, etc.)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"mcp.so directory","u":"https://mcp.so/","co":"Mcp","f":"Free community-submitted MCP server directory, keyless","p":"n/a","b":"SEO-visible MCP server catalog","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Microsoft NLWeb","u":"https://github.com/nlweb-ai/NLWeb","co":"Nlweb ai","f":"Free, open-source; turns sites into MCP-server agentic endpoints","p":"n/a","b":"Natural-language agentic interface for websites","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Model Context Protocol (MCP) — Spec & Schema","u":"https://modelcontextprotocol.io/specification","co":"Modelcontextprotocol","f":"Free, open spec; TypeScript/JSON schema openly published, no key","p":"n/a","b":"Standard for connecting LLMs to tools/data sources","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Official MCP Registry API","u":"https://registry.modelcontextprotocol.io/docs","co":"Modelcontextprotocol","f":"Free public REST API (v0), keyless reads via /v0/servers","p":"n/a","b":"Discovering publicly available MCP servers programmatically","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAI Function Calling / Tools API","u":"https://platform.openai.com/docs/guides/function-calling","co":"OpenAI","f":"Free docs/spec; API usage is paid (no free runtime tier)","p":"Pay-per-token (model-dependent)","b":"JSON-schema tool definitions for LLM function calls","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"OpenAPI Specification","u":"https://spec.openapis.org/","co":"Openapis","f":"Free, open standard; underpins agents.json, ACP, tool discovery","p":"n/a","b":"Machine-readable API contracts agents consume","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PulseMCP Server Directory","u":"https://www.pulsemcp.com/servers","co":"Pulsemcp","f":"Free MCP server/use-case directory with public API, keyless","p":"n/a","b":"Browsing MCP servers, clients, and use cases","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Smithery MCP Registry","u":"https://smithery.ai/","co":"Smithery","f":"Free registry + CLI publish/install; thousands of servers","p":"Paid hosted remote-server tiers","b":"npm-like MCP server publishing and discovery","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"W3C Decentralized Identifiers (DID)","u":"https://www.w3.org/TR/did-core/","co":"W3C","f":"Free, open W3C standard; agent identity for ANP/AP2","p":"n/a","b":"Decentralized identity for agents/credentials","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"x402 (Coinbase) — HTTP 402 payments","u":"https://www.x402.org/","co":"X402","f":"Free, open protocol over HTTP; zero protocol fees","p":"n/a (stablecoin per-request micropayments)","b":"Agent/API pay-per-call stablecoin micropayments","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"}]},{"category":"Open foundation model families & access","count":27,"entries":[{"n":"Ai2 OLMo (Allen Institute for AI)","u":"https://allenai.org/olmo","co":"Allenai","f":"Fully open weights + data + code; free Ai2 Playground","p":"n/a (self-host or partner APIs)","b":"Truly open LLMs with full training data/checkpoints, OLMo 3","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Alibaba Cloud Model Studio (Qwen / DashScope)","u":"https://www.alibabacloud.com/help/en/model-studio/","co":"Alibabacloud","f":"Free quota ~1M in + 1M out tokens per model on activation; OpenAI-compatible","p":"Pay-as-you-go per token (region-specific endpoints)","b":"First-party OpenAI-compatible API for full Qwen family","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cerebras Inference","u":"https://www.cerebras.ai/inference","co":"Cerebras","f":"Free w/ key, up to 1M tokens/day, 30 RPM, no card (Llama, Qwen3, gpt-oss)","p":"~$0.10-$6/M tokens by model size","b":"Fastest open-model inference (wafer-scale), big free daily quota","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cloudflare Workers AI","u":"https://developers.cloudflare.com/workers-ai/models/","co":"Cloudflare","f":"Free, 10,000 Neurons/day (Llama, Mistral, Gemma, DeepSeek-R1)","p":"$0.011 per 1,000 Neurons on Workers Paid","b":"Edge-hosted open-model inference inside Cloudflare Workers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Deep Infra","u":"https://deepinfra.com/","co":"Deepinfra","f":"Small free credit on signup; pay-per-token after","p":"Low per-token rates (e.g. Llama, DeepSeek, Qwen)","b":"Cheap serverless inference for many open models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DeepSeek Platform","u":"https://api-docs.deepseek.com/quick_start/pricing","co":"Deepseek","f":"~5M tokens free credits on signup, no card, ~30-day","p":"DeepSeek-Chat ~$0.28/M in, $0.42/M out","b":"First-party API for MIT-licensed DeepSeek V/R reasoning models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Fireworks AI","u":"https://fireworks.ai/models","co":"Fireworks AI","f":"$1 free credits, no ongoing free tier","p":"$0.10/M sub-4B; $0.90/M for 16B+ models","b":"Fast serverless inference + fine-tuning of 50+ open models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GitHub Models","u":"https://github.com/marketplace/models","co":"Marketplace","f":"Free w/ GitHub PAT (models:read), per-model RPM/RPD caps (Llama, Phi, DeepSeek, Mistral)","p":"Pay-as-you-go via Azure AI billing","b":"Free playground + prototyping API for open + closed models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Google AI Studio (Gemma API)","u":"https://ai.google.dev/gemma","co":"Google","f":"Free API key with rate limits; Gemma weights free to download","p":"Pay-as-you-go via Gemini API / Vertex AI","b":"Free hosted access + weights for Google's open Gemma family","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Groq Cloud","u":"https://console.groq.com/docs/models","co":"Groq","f":"Free w/ key, ~30 RPM / 1000 RPD (Llama 3.1 8B up to 14.4K RPD), no card","p":"From $0.05/M input tokens (Llama 3.1 8B)","b":"Ultra-fast LPU inference of open models, generous free tier","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hugging Face Hub (model weights/download)","u":"https://huggingface.co/models","co":"Hugging Face","f":"Free downloads of open weights (Llama, Mistral, Qwen, Gemma, Falcon, Phi, OLMo)","p":"PRO $9/mo; Inference Endpoints pay-as-you-go","b":"Central download point for nearly all open model weights","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Hugging Face Inference Providers (Serverless)","u":"https://huggingface.co/docs/inference-providers/en/index","co":"Hugging Face","f":"Free w/ key, $0.10/100K monthly included credits; PRO adds $2/2M","p":"PRO $9/mo; pay-as-you-go credits beyond","b":"Routed serverless inference across all open model families on the Hub","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hyperbolic","u":"https://hyperbolic.xyz/","co":"Hyperbolic","f":"Free signup credits; open-model serverless + GPU rental","p":"Pay-as-you-go per token / per-GPU-hour","b":"Low-cost open-model inference and on-demand GPUs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Kaggle Models","u":"https://www.kaggle.com/models","co":"Kaggle","f":"Free download/use of open model variants (Gemma, Llama, etc.)","p":"n/a","b":"Alternate free download + notebook runtime for open weights","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Meta Llama API (llama.developer.meta.com)","u":"https://llama.developer.meta.com/","co":"Meta","f":"Free limited preview (waitlist), one-click key, OpenAI-compatible","p":"n/a (preview; weights free under Llama Community License)","b":"Meta-hosted first-party API for Llama models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft Phi (Azure AI Foundry / HF)","u":"https://azure.microsoft.com/en-us/products/phi","co":"Microsoft","f":"Free MIT-licensed weights on HF & Ollama; Foundry deploy","p":"Azure AI Foundry pay-as-you-go inference","b":"Small reasoning-focused open models (Phi-4, mini, multimodal)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Mistral AI — La Plateforme","u":"https://mistral.ai/pricing/","co":"Mistral AI","f":"Free Experiment tier (phone verify, no card), all models, rate-limited","p":"From ~$0.20/M (Small); Large $2/M in, $6/M out","b":"First-party API for Mistral/Mixtral/Codestral open + premier models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Nebius AI Studio (Token Factory)","u":"https://nebius.com/services/studio-inference-service","co":"Nebius","f":"$1 permanent free credits; promo $100 for new users; many open models","p":"Pay-as-you-go per token","b":"Serverless inference + fine-tuning of open models (Llama, Qwen, DeepSeek)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Novita AI","u":"https://novita.ai/","co":"Novita","f":"$0.50 free credits (valid 1 yr); pay-per-token after","p":"Low per-token rates across open models","b":"Cheap serverless open-model inference, HF Inference Provider","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NVIDIA NIM / build.nvidia.com","u":"https://build.nvidia.com/models","co":"Nvidia","f":"Free, no card; 1,000 inference credits (up to 5,000), 40 RPM","p":"Self-host NIM via NVIDIA AI Enterprise license","b":"Trying 100+ optimized open models (Llama, Mistral, Qwen, Gemma)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ollama","u":"https://ollama.com/library","co":"Ollama","f":"Free, open source; local, no key, no limits","p":"n/a (self-hosted compute)","b":"Running open models locally with a simple REST API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenRouter","u":"https://openrouter.ai/models","co":"OpenRouter","f":"Free w/ key, 50 req/day on :free models (Llama, Gemma, Qwen, DeepSeek, Mistral)","p":"$10 credits unlocks 1000/day; base price +5.5%","b":"One OpenAI-compatible API across many open + closed models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Replicate","u":"https://replicate.com/collections/language-models","co":"Replicate","f":"Curated free-to-run collection; prepaid credit after, pay-per-second","p":"From ~$0.0001/sec (CPU) up to ~$0.0122/sec (8x H100)","b":"Pay-per-use hosted open models + fine-tuning via simple API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SambaNova Cloud","u":"https://cloud.sambanova.ai/","co":"Sambanova","f":"Free persistent tier, no card; +$5 credits (Llama up to 405B, Qwen, DeepSeek)","p":"Pay-as-you-go per token","b":"Fast RDU inference of large open models incl. Llama 405B","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TII Falcon LLM","u":"https://falconllm.tii.ae/","co":"Tii","f":"Free open weights (Falcon 3, H1, Mamba, 180B) on HF, mostly Apache/TII license","p":"n/a (self-host)","b":"Downloading TII's open Falcon model family weights","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Together AI","u":"https://www.together.ai/models","co":"Together AI","f":"Promo free credits historically; now $5 min purchase to start, some free serverless models","p":"From ~$0.18/M (Llama 4 Scout)","b":"200+ open models serverless + fine-tuning (Llama, Qwen, DeepSeek)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Amazon Bedrock (open models)","u":"https://aws.amazon.com/bedrock/","co":"AWS","f":"none (AWS free-tier credits may apply); pay-as-you-go","p":"Per-token, e.g. Llama / Mistral / DeepSeek models","b":"Enterprise-managed serverless access to open model families on AWS","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"}]},{"category":"Open model hosting & inference APIs","count":24,"entries":[{"n":"AI/ML API","u":"https://aimlapi.com/","co":"Aimlapi","f":"Free signup credit; OpenAI-compatible aggregator over 300+ models incl. open-weight","p":"Per-token passthrough; subscription tiers from ~$5/mo","b":"Single API across many open and proprietary models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Anyscale (Platform)","u":"https://docs.anyscale.com/llm","co":"Anyscale","f":"Trial credit; multi-tenant serverless Endpoints retired Aug 2024 (now hosted Ray platform)","p":"Compute-based pricing on Ray-powered hosted platform","b":"Ray-based open-model serving & fine-tuning at scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Baseten","u":"https://www.baseten.co/","co":"Baseten","f":"Trial credit; primarily dedicated deployments","p":"Per replica-hour (running replicas always billed)","b":"Production custom/open model deployment & autoscaling","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cerebras Inference","u":"https://www.cerebras.ai/inference","co":"Cerebras","f":"Free w/ key, no credit card; 1M tokens/day, ~30 RPM (Llama 3.3 70B, Qwen3, GPT-OSS 120B)","p":"Pay-as-you-go per token (varies by model)","b":"Ultra-fast wafer-scale inference for open LLMs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cloudflare Workers AI","u":"https://developers.cloudflare.com/workers-ai/","co":"Cloudflare","f":"Free w/ key, no card; 10,000 Neurons/day; 47+ open models (Llama, Mistral, Qwen, Gemma, Whisper, SDXL) at the edge","p":"$0.011 per 1,000 Neurons beyond free allocation","b":"Free edge inference of open models, OpenAI-compatible","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DeepInfra","u":"https://deepinfra.com/pricing","co":"Deepinfra","f":"Free w/ key; $5 signup credit, no credit card; OpenAI-compatible","p":"From ~$0.02-0.06/M (small Llama/Mistral); most under $1.50/M","b":"Cheapest pay-per-token open-model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Featherless AI","u":"https://featherless.ai/","co":"Featherless","f":"No free tier; flat-rate subscription model","p":"Flat $10/month (Basic) for serverless open-model access","b":"Flat-rate access to a huge long-tail of open models","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Fireworks AI","u":"https://fireworks.ai/pricing","co":"Fireworks AI","f":"$1 free credit on signup; 600 RPM; 100+ open models","p":"Serverless from $0.10/M (<4B) up to $0.90/M (>16B)","b":"Fast serverless open-model inference + tuning","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GMI Cloud Inference Engine","u":"https://www.gmicloud.ai/en/models","co":"Gmicloud","f":"Trial credit; serverless (scale-to-zero) + dedicated GPU clusters","p":"Per-token from ~$0.15/M; or per-request / GPU-hour","b":"NVIDIA-backed serverless open-model + GPU clusters","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Groq (GroqCloud)","u":"https://groq.com/pricing","co":"Groq","f":"Free w/ key, no credit card; ~30 RPM, 14,400 req/day, curated open models (Llama, Qwen3, GPT-OSS, DeepSeek distill)","p":"$0.05 per 1M input tokens (Llama 3.1 8B)","b":"Fastest open-model inference on LPU hardware","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hugging Face Inference Providers","u":"https://huggingface.co/docs/inference-providers/index","co":"Hugging Face","f":"Free serverless for thousands of public models, ~few hundred req/hr; routes to providers","p":"PRO $9/mo (2M provider credits + ZeroGPU); then compute-time billed","b":"Testing thousands of open models via one API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Hyperbolic","u":"https://docs.hyperbolic.xyz/docs/hyperbolic-pricing","co":"Hyperbolic","f":"Free $1 signup credit, pay-as-you-go; 25+ open models","p":"From $0.10/M (Llama 3.1 8B); images from $0.01","b":"Low-cost open-model + image inference, OpenAI-compatible","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Inference.net","u":"https://inference.net/","co":"Inference","f":"Free signup credit; OpenAI-compatible serverless open models (Llama, Qwen, DeepSeek)","p":"Pay-as-you-go per token; from ~$0.03/M for small models","b":"Low-cost serverless + batch open-model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lambda Inference API","u":"https://lambda.ai/inference","co":"Lambda","f":"No subscription/rate-limited tiers; pay-as-you-go, quick key setup","p":"From $0.02/M (Llama 3.2 3B) to $0.90/M (Llama 3.1 405B)","b":"Low-cost OpenAI-compatible open-model inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mistral AI (La Plateforme)","u":"https://mistral.ai/pricing/","co":"Mistral AI","f":"Free Experiment tier (phone-verified, no card); ~1 RPS, generous monthly token cap","p":"Mistral Large $2/M in, $6/M out; Small from $0.20/M","b":"First-party Mistral/Mixtral/Codestral open-weight models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Modal","u":"https://modal.com/pricing","co":"Modal","f":"Free $30/mo compute credits; serverless GPU for self-deployed open models","p":"Per-second GPU compute (e.g. A10G/H100 hourly rates)","b":"Serverless GPU to deploy any open model/container","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nebius Token Factory","u":"https://nebius.com/services/token-factory","co":"Nebius","f":"Signup credit; European cloud; 60+ open-weight models (Llama, Qwen, DeepSeek, GPT-OSS, Mistral)","p":"Transparent $/token; from ~$0.06/M input tokens","b":"EU-hosted, low-cost open-weight LLM inference","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Novita AI","u":"https://novita.ai/pricing","co":"Novita","f":"Free signup credit; OpenAI-compatible; LLM/image/audio + GPU instances","p":"LLM from ~$0.20/M tokens; GPU instances by the hour","b":"Budget multi-modal open-model inference + GPU rental","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NVIDIA NIM (build.nvidia.com)","u":"https://build.nvidia.com/models","co":"Nvidia","f":"Free w/ key (nvapi-); ~40 RPM hosted, 100+ open models, OpenAI-compatible","p":"Free hosted tier; self-host via NIM containers (NVIDIA AI Enterprise license)","b":"Free hosted catalog of 100+ open models","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ollama (+ Ollama Cloud)","u":"https://github.com/ollama/ollama","co":"Ollama","f":"Free local runtime (keyless); OpenAI-compatible localhost:11434; cloud tier extra","p":"Local free; Ollama Cloud subscription for hosted runs","b":"Self-hosted/local open-model inference, OpenAI-compatible","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenRouter","u":"https://openrouter.ai/","co":"OpenRouter","f":"Free w/ key; free models ~20 RPM/200 req/day; unified router across 300+ models","p":"Passthrough per-token; $5 min credit purchase","b":"Unified router/aggregator across many model providers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Replicate","u":"https://replicate.com/pricing","co":"Replicate","f":"Limited free runs before billing setup required","p":"Pay per second of compute (hardware-dependent)","b":"Running community open models (LLMs, image, audio)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SambaNova Cloud","u":"https://cloud.sambanova.ai/plans","co":"Sambanova","f":"Free w/ $5 credit, no card; fast Llama 3.x (incl. 405B), Tulu, DeepSeek","p":"Pay-as-you-go per token after credit","b":"Record-speed inference on large open models (RDU)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Together AI","u":"https://www.together.ai/pricing","co":"Together AI","f":"Free signup credit (~$1-5); 200+ open models serverless","p":"Llama 3.1 8B $0.18/M; range $0.05-$9/M tokens","b":"Broad open-model catalog + fine-tuning","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"}]},{"category":"Patents","count":23,"entries":[{"n":"DPMA DEPATISnet","u":"https://www.dpma.de/english/search/depatisnet/index.html","co":"Dpma","f":"Free, keyless web search (worldwide publications, IPC 2025)","p":"n/a","b":"German patent office worldwide document archive search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DPMAconnect (DPMAconnectPlus API)","u":"https://www.dpma.de/english/search/data_supply_services/dpmaconnect/index.html","co":"Dpma","f":"Data retrieval free; REST API needs agreement","p":"EUR 200 one-time connection fee + package costs","b":"Automated German register/publication data access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPO Open Patent Services (OPS)","u":"https://developers.epo.org/","co":"EPO","f":"Free w/ key (non-paying tier, ~4GB/week via OAuth)","p":"Paid plans for higher-volume/commercial use","b":"Worldwide bibliographic, full-text, legal status patent data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"EPO PATSTAT (Online & bulk)","u":"https://www.epo.org/en/searching-for-patents/business/patstat","co":"EPO","f":"Free 2-month PATSTAT Online trial (SQL)","p":"EUR 630/single edition; EUR 1,250/year (two editions)","b":"Worldwide patent statistics database (~100M+ records)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Espacenet (EPO)","u":"https://worldwide.espacenet.com/","co":"Espacenet","f":"Free, keyless web search (not for bulk; 1782-present, 150M+ docs)","p":"n/a (bulk via OPS)","b":"Free worldwide patent search and document viewing","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EUIPO Trademark & Design Search API","u":"https://dev.euipo.europa.eu/product","co":"European Union","f":"Free w/ registration (EU trademarks, designs)","p":"n/a","b":"EU trademark/design data (IP adjacent to patents)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Google Patents Public Data (BigQuery)","u":"https://github.com/google/patents-public-data","co":"Google","f":"Free first 1TB/month BigQuery processing; public datasets","p":"BigQuery on-demand ~$6.25/TB after free tier","b":"100M+ worldwide patents, research data, SQL analytics at scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Lens.org Patent & Scholar API","u":"https://docs.api.lens.org/","co":"Lens.org","f":"14-day free trial; academic non-commercial via institutional subscription","p":"Custom/negotiated pricing","b":"Patents + scholarly works, families, global coverage","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"OECD Patent Datasets (PATSTAT-linked)","u":"https://www.oecd.org/en/topics/intellectual-property.html","co":"OECD","f":"Free (PATSTAT-derived patent quality/citation/family indicators)","p":"n/a","b":"Patent quality/citation/family indicators for research","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"PatentsView Bulk Data Downloads","u":"https://patentsview.org/download/data-download-tables","co":"PatentsView","f":"Free, keyless (bulk CSV/TSV: assignees, inventors, CPC/IPC, citations)","p":"n/a","b":"Bulk US patent tables for text mining and joins","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PatentsView PatentSearch API","u":"https://search.patentsview.org/docs/","co":"PatentsView","f":"Free w/ key (USPTO-disambiguated US patent data; ~45 queries/min)","p":"n/a","b":"US patent metadata, inventor/assignee disambiguation, citations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"PQAI Patent Search API","u":"https://projectpq.ai/patent-search-api-by-pqai/","co":"Projectpq","f":"Web tool free; API access requires PQAI+ ($20/mo, up to 50 API queries/day)","p":"$20/month (PQAI+)","b":"AI prior-art search from plain-language invention descriptions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ScrapingBee Google Patents Scraper API","u":"https://www.scrapingbee.com/scrapers/google-patents-api/","co":"Scrapingbee","f":"Free 1,000 API call trial credits","p":"~$49/month (entry plan)","b":"Google Patents scraping with managed proxies/rendering","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SerpApi Google Patents API","u":"https://serpapi.com/google-patents-api","co":"Serpapi","f":"Free tier: 100 searches/month","p":"~$75/month (entry plan)","b":"Structured Google Patents search results in JSON","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USPTO Open Data Portal (ODP) API","u":"https://data.uspto.gov/apis/getting-started","co":"USPTO","f":"Free w/ key (USPTO.gov account required)","p":"n/a","b":"US patent file wrappers, applications, examination data (PEDS successor)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USPTO Patent Assignment Search API","u":"https://assignment-api.uspto.gov/","co":"USPTO","f":"Free, keyless (patent assignment/ownership transfer records)","p":"n/a","b":"US patent ownership and assignment history lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USPTO PatFT/AppFT Patent Public Search","u":"https://ppubs.uspto.gov/pubwebapp/","co":"USPTO","f":"Free, keyless web search of US patents & published applications","p":"n/a","b":"Official US full-text patent and application search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WIPO API Catalog for IP","u":"https://apicatalog.wipo.int/","co":"Wipo","f":"Free directory of IP-office APIs (patents, trademarks, designs)","p":"n/a (directory)","b":"Discovering national/regional IP office APIs worldwide","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WIPO IP Statistics Data Center","u":"https://www.wipo.int/en/web/ip-statistics/about","co":"Wipo","f":"Free, keyless (patent applications/grants indicators)","p":"n/a","b":"Macro IP statistics, patent families by country/technology","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WIPO PATENTSCOPE API","u":"https://patentscope.wipo.int/","co":"Wipo","f":"Free web search; programmatic SOAP API is paid","p":"CHF 2,000/year for API","b":"PCT international applications, national patent collections","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"WIPO PATENTSCOPE PCT Data Products","u":"https://www.wipo.int/en/web/patentscope/data/index","co":"Wipo","f":"Free, keyless weekly PCT bibliographic data downloads (XML)","p":"n/a (bulk full-text/sequence listings free or low-cost)","b":"Bulk PCT international application bibliographic data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IFI CLAIMS (CLAIMS Direct)","u":"https://www.ificlaims.com/","co":"Ificlaims","f":"none (commercial; powers Google Patents data)","p":"Paid (custom quote)","b":"Premium global patent data, 100+ authorities, full-text","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"IPRally","u":"https://www.iprally.com/","co":"Iprally","f":"none (commercial)","p":"Paid (custom quote)","b":"AI graph-based patent/prior-art search across 10+ offices","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Pharmaceuticals & Biotech","count":28,"entries":[{"n":"BindingDB API","u":"https://www.bindingdb.org/rwd/bind/BindingDBRESTfulAPI.jsp","co":"Bindingdb","f":"Free, keyless REST","p":"n/a","b":"Measured binding affinities for drug targets and ligands","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ChEMBL Web Services (EMBL-EBI)","u":"https://www.ebi.ac.uk/chembl/api/data/docs","co":"EMBL-EBI","f":"Free, keyless REST","p":"n/a","b":"Bioactivity data, drug-like molecules, targets, assays","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless REST, JSON","p":"n/a","b":"Clinical trial pipeline, sponsors, conditions, results","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CMS Medicare Part D Spending by Drug","u":"https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug","co":"Cms","f":"Free, keyless data.cms.gov API","p":"n/a","b":"Medicare/Medicaid drug spending and unit-cost trends","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CMS NADAC (data.medicaid.gov)","u":"https://data.medicaid.gov/about/api","co":"Medicaid","f":"Free, keyless open data API","p":"n/a","b":"National Average Drug Acquisition Cost pricing","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DailyMed API (NLM)","u":"https://dailymed.nlm.nih.gov/dailymed/app-support-web-services.cfm","co":"NLM (NIH)","f":"Free, keyless REST (v2)","p":"n/a","b":"FDA Structured Product Labeling (SPL) drug labels","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DGIdb (Drug-Gene Interaction DB)","u":"https://dgidb.org/api","co":"Dgidb","f":"Free, keyless GraphQL (endpoint /api/graphql)","p":"n/a","b":"Drug-gene interactions and druggable genome","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DisGeNET API","u":"https://www.disgenet.org/api/","co":"Disgenet","f":"Free academic tier w/ free key (rate-limited)","p":"Commercial license (DisGeNET plus) required for non-academic","b":"Gene-disease and variant-disease associations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DrugBank API","u":"https://dev.drugbank.com/","co":"Drugbank","f":"Dev key 3,000 req/mo (commercial license for production)","p":"Contact sales (usage-based, paid)","b":"Comprehensive drug, target, pricing, interaction data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EMA ePI Consuming API (European Medicines Agency)","u":"https://epi.developer.ema.europa.eu/api-details","co":"European Union","f":"Free, keyless (no subscription/key required for ePI data)","p":"n/a","b":"EU electronic product information (SmPC, leaflets) for medicines","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EMA Medicines Open Data (downloads/PMD)","u":"https://www.ema.europa.eu/en/about-us/about-website/download-website-data-json-data-format","co":"European Union","f":"Free, keyless downloadable datasets (EPAR/medicines tables)","p":"n/a","b":"EU drug approval status, EPAR metadata bulk datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Ensembl REST API","u":"https://rest.ensembl.org","co":"Ensembl","f":"Free, keyless","p":"n/a","b":"Genes, genomes, variants, orthologs, sequence","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FDA Orange Book Data Files","u":"https://www.fda.gov/drugs/drug-approvals-and-databases/orange-book-data-files","co":"U.S. FDA","f":"Free bulk download (no live API; via openFDA drugsfda)","p":"n/a","b":"Approved products, therapeutic equivalence, patents","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"HGNC genenames.org REST API","u":"https://www.genenames.org/help/rest/","co":"Genenames","f":"Free, keyless","p":"n/a","b":"Official human gene symbols and nomenclature","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"KEGG REST API","u":"https://www.kegg.jp/kegg/rest/","co":"Kegg","f":"Free for academic use, keyless","p":"Commercial license (FTP/subscription) required for non-academic","b":"Drug, pathway, disease and compound linkages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyChem.info (BioThings)","u":"https://mychem.info/","co":"Mychem","f":"Free, keyless REST","p":"n/a","b":"Aggregated drug/chemical annotation by common IDs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MyGene.info (BioThings)","u":"https://mygene.info/","co":"Mygene","f":"Free, keyless REST","p":"n/a","b":"Gene annotation lookup and cross-ID querying","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NLM Clinical Table Search Service (RxTerms)","u":"https://clinicaltables.nlm.nih.gov/","co":"NLM (NIH)","f":"Free, keyless autocomplete","p":"n/a","b":"Fast drug-name/ICD/condition autocomplete for forms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Targets Platform API","u":"https://platform.opentargets.org/api","co":"Opentargets","f":"Free, keyless GraphQL","p":"n/a","b":"Target-disease associations, drug MoA, indications","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openFDA Drug API","u":"https://open.fda.gov/apis/drug/","co":"openFDA","f":"Free, keyless (1k/day/IP); free key raises to 120k/day","p":"n/a","b":"FDA adverse events, labels, NDC, recalls, Drugs@FDA approvals","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PharmGKB REST API","u":"https://api.pharmgkb.org/swagger/","co":"Pharmgkb","f":"Free, keyless (CC license)","p":"n/a","b":"Pharmacogenomics: gene-drug-variant relationships","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PubChem PUG REST (NCBI)","u":"https://pubchem.ncbi.nlm.nih.gov/docs/pug-rest","co":"NCBI (NIH)","f":"Free, keyless (5 req/s limit)","p":"n/a","b":"Chemical compounds, structures, properties, bioassays","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RCSB Protein Data Bank (PDB) API","u":"https://data.rcsb.org/","co":"RCSB PDB","f":"Free, keyless REST + GraphQL","p":"n/a","b":"3D macromolecular/protein structures, search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Reactome ContentService API","u":"https://reactome.org/ContentService/","co":"Reactome","f":"Free, keyless REST","p":"n/a","b":"Biological pathways, reactions, drug/disease pathway mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RxClass API (RxNav / NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/RxClassAPIs.html","co":"NLM (NIH)","f":"Free, keyless","p":"n/a","b":"Drug class membership (ATC, MeSH, MoA, EPC)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RxNorm API (RxNav / NLM)","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/RxNormAPIs.html","co":"NLM (NIH)","f":"Free, keyless, no license","p":"n/a","b":"Normalized drug names, RxCUIs, ingredient/brand mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UniProt REST API","u":"https://www.uniprot.org/help/api","co":"UniProt","f":"Free, keyless, open access","p":"n/a","b":"Protein sequences, function annotation, ID mapping","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO ATC/DDD Index","u":"https://atcddd.fhi.no/atc_ddd_index/","co":"Fhi","f":"Free searchable web index only (no official REST API)","p":"Machine-readable Excel file ~EUR 200/yr","b":"ATC drug classification codes and defined daily doses","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"}]},{"category":"Philosophy, Religion & Ethics","count":29,"entries":[{"n":"Aladhan Prayer Times & Islamic Calendar API","u":"https://aladhan.com/prayer-times-api","co":"Aladhan","f":"Free, keyless; prayer times + Hijri/Gregorian conversion","p":"n/a","b":"Islamic prayer times, Hijri calendar, holy days","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AlQuran Cloud API","u":"https://alquran.cloud/api","co":"Alquran","f":"Free, keyless; surahs/ayahs, multiple text & audio editions","p":"n/a","b":"Quick keyless Quran text and audio editions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"API.Bible (scripture.api.bible)","u":"https://scripture.api.bible/","co":"Api","f":"Free Starter: 5k calls/day, hundreds of open Bibles + 3 licensed (non-commercial)","p":"~$10/mo per licensed translation (commercial)","b":"2,500+ Bible versions in 1,600+ languages, text & audio","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Association of Religion Data Archives (ARDA)","u":"https://www.thearda.com/","co":"Thearda","f":"Free downloads of 1,400+ religion datasets (no public REST API)","p":"n/a","b":"U.S./international religion survey & membership data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Bhagavad Gita API (vedicscriptures)","u":"https://github.com/vedicscriptures/bhagavad-gita-api","co":"Vedicscriptures","f":"Free, keyless open-source REST (vedicscriptures.github.io); Sanskrit/English/Hindi, multiple translations","p":"n/a","b":"Bhagavad Gita verses with multiple translations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"bible-api.com","u":"https://bible-api.com/","co":"Bible api","f":"Free, keyless; WEB default + several public-domain translations","p":"n/a","b":"Simple keyless Bible verse/passage lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Bolls Bible API (bolls.life)","u":"https://bolls.life/api/","co":"Bolls","f":"Free, keyless; many versions/languages incl. Hebrew/Greek","p":"n/a","b":"Multilingual Bible incl. original-language texts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ESV Bible API (Crossway)","u":"https://api.esv.org/","co":"Esv","f":"Free w/ key, non-commercial; 5k queries/day","p":"n/a (commercial licensing separate)","b":"ESV scripture text, passages, audio for apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"fawazahmed0 Hadith API","u":"https://github.com/fawazahmed0/hadith-api","co":"Fawazahmed0","f":"Free, keyless CDN; multiple Hadith editions in JSON","p":"n/a","b":"Keyless Hadith editions, multilingual, static JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"fawazahmed0 Quran API","u":"https://github.com/fawazahmed0/quran-api","co":"Fawazahmed0","f":"Free, keyless, no rate limit (CDN); 440+ translations, 90+ langs","p":"n/a","b":"Huge multilingual Quran translation corpus, static JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Free Use Bible API (AO Lab)","u":"https://bible.helloao.org/","co":"Helloao","f":"Free, keyless, no limits; 1,000+ translations, commercial OK","p":"n/a","b":"Unrestricted, large multilingual Bible corpus","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GetBible.net API v2","u":"https://getbible.net/docs","co":"Getbible","f":"Free, keyless JSON; 200+ public-domain Bible translations","p":"n/a","b":"Keyless multi-translation Bible verse lookup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Hendrycks ETHICS dataset (Hugging Face)","u":"https://huggingface.co/datasets/hendrycks/ethics","co":"Hugging Face","f":"Free dataset via HF Datasets API; 130k+ moral scenarios","p":"n/a","b":"ML ethics benchmark: justice, virtue, deontology, etc.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"InPhO (Internet Philosophy Ontology Project)","u":"https://www.inphoproject.org/","co":"Inphoproject","f":"Free REST API + monthly OWL ontology archive (CC BY-NC-SA)","p":"n/a","b":"Philosophy ontology: thinkers, ideas, journals relations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Internet Sacred Text Archive (sacred-texts.com)","u":"https://sacred-texts.com/","co":"Sacred texts","f":"Free web archive of 1,700+ religious texts (official API defunct)","p":"CD-ROM/download editions for sale","b":"Cross-religion public-domain sacred & esoteric texts","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Moral Machine dataset (MIT)","u":"https://www.moralmachine.net/","co":"Moralmachine","f":"Free public research dataset (download, no live API)","p":"n/a","b":"Crowdsourced AV moral-dilemma decision data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Open Siddur Project","u":"https://opensiddur.org/","co":"Opensiddur","f":"Free, open-source Jewish liturgical texts (downloadable XML/JLPTEI)","p":"n/a","b":"Jewish prayerbook/liturgy texts, open data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pew Research Religion Datasets","u":"https://www.pewresearch.org/religion-datasets/","co":"Pewresearch","f":"Free w/ account; downloadable SPSS/Excel (no live API)","p":"n/a","b":"Global religious composition & survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PhilPapers JSON API","u":"https://philpapers.org/help/api/json.html","co":"Philpapers","f":"Free; JSON + Embedding API. Requires free API ID + key (sign-in/registration required)","p":"n/a","b":"Philosophy bibliography, paper metadata, categories index","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PhilPapers OAI-PMH","u":"https://philpapers.org/help/oai.html","co":"Philpapers","f":"Free, keyless OAI-PMH metadata harvesting","p":"n/a","b":"Bulk harvesting philosophy archive metadata records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Quotable API (lukePeavey)","u":"https://github.com/lukePeavey/quotable","co":"LukePeavey","f":"Free, keyless; 180 req/min; tagged quotes incl. philosophy","p":"n/a","b":"Philosophy/wisdom quotes by author with tags","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Quran Foundation Content API (Quran.com v4)","u":"https://api-docs.quran.foundation/","co":"Quran","f":"Free w/ OAuth2 client credentials; verses, translations, tafsir, audio","p":"n/a","b":"Authoritative Quran text, translations, recitations, search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"QuranicAudio API","u":"https://quranicaudio.com/","co":"Quranicaudio","f":"Free, keyless; full Quran recitation audio by reciter","p":"n/a","b":"Quran recitation audio files by reciter","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sefaria API","u":"https://developers.sefaria.org/","co":"Sefaria","f":"Free, keyless REST API; JSON Hebrew/English texts + links","p":"n/a","b":"Jewish texts: Torah, Talmud, Mishnah, commentaries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Stanford Encyclopedia of Philosophy (SEP)","u":"https://plato.stanford.edu/","co":"Stanford","f":"Free entries online; no official REST API","p":"n/a","b":"Authoritative peer-reviewed philosophy reference entries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Stoic Quotes API (benhoneywill / stoic-quotes.com)","u":"https://github.com/benhoneywill/stoic-quotes","co":"Benhoneywill","f":"Free, keyless; random Stoic philosophy quotes","p":"n/a","b":"Stoicism quotes (Seneca, Aurelius, Epictetus)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Sunnah.com Hadith API","u":"https://sunnah.com/developers","co":"Sunnah","f":"Free w/ key (request via GitHub); Bukhari, Muslim, others","p":"n/a","b":"Canonical Hadith collections, Arabic/English","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wikisource API (MediaWiki Action API)","u":"https://en.wikisource.org/w/api.php","co":"Wikisource","f":"Free, keyless MediaWiki API; public-domain religious & philosophical texts","p":"n/a","b":"Full-text sacred & philosophy works (Bible, Quran, classics)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ZenQuotes API","u":"https://zenquotes.io/","co":"Zenquotes","f":"Free keyless w/ attribution + rate limit; key for more","p":"Paid plans for higher limits","b":"Inspirational/philosophical daily quotes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Physics & Astronomy","count":29,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"Physics/astro/math preprint metadata & full-text search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Astrometry.net (Nova) API","u":"https://nova.astrometry.net/api_help","co":"Astrometry","f":"Free w/ account key","p":"n/a","b":"Blind plate-solving of astronomical images to WCS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CelesTrak GP / TLE API","u":"https://celestrak.org/NORAD/documentation/gp-data-formats.php","co":"CelesTrak","f":"Free, keyless (TLE/CSV/JSON)","p":"n/a","b":"Satellite orbital elements (TLE) for tracking","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CERN Open Data Portal","u":"https://opendata.cern.ch/","co":"CERN","f":"Free, keyless (REST + bulk DOI)","p":"n/a","b":"LHC particle-collision datasets and analysis software","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ESO Science Archive (TAP/programmatic)","u":"https://archive.eso.org/programmatic/","co":"Eso","f":"Free, keyless (login for proprietary)","p":"n/a","b":"Very Large Telescope & ESO observatory raw/reduced data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Gaia ESA Archive (TAP+)","u":"https://gea.esac.esa.int/archive/","co":"ESA","f":"Free, keyless (auth optional for jobs)","p":"n/a","b":"Billion-star astrometry, parallax & photometry catalog","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GWOSC (Gravitational Wave Open Science Center)","u":"https://gwosc.org/api/v1/docs/","co":"Gwosc","f":"Free, keyless JSON API","p":"n/a","b":"LIGO/Virgo/KAGRA strain data & event catalogs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HITRAN (HITRANonline / hapi)","u":"https://hitran.org/","co":"Hitran","f":"Free w/ account (hapi API)","p":"n/a","b":"Molecular spectroscopic line-by-line absorption data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IAU Minor Planet Center Web Service","u":"https://minorplanetcenter.net/web_service/","co":"Minorplanetcenter","f":"Free (shared basic-auth credentials provided)","p":"n/a","b":"Authoritative asteroid/comet orbits & observations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"INSPIRE-HEP REST API","u":"https://github.com/inspirehep/rest-api-doc","co":"Inspirehep","f":"Free, keyless (no limits stated)","p":"n/a","b":"High-energy physics literature, authors & institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"JPL Horizons API","u":"https://ssd-api.jpl.nasa.gov/doc/horizons.html","co":"NASA","f":"Free, keyless","p":"n/a","b":"High-accuracy solar-system body ephemerides","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"JPL SSD/CNEOS Small-Body Database API","u":"https://ssd-api.jpl.nasa.gov/doc/sbdb.html","co":"NASA","f":"Free, keyless","p":"n/a","b":"Asteroid/comet orbital elements & physical data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"MAST (Mikulski Archive for Space Telescopes)","u":"https://mast.stsci.edu/api/v0/","co":"Stsci","f":"Free, keyless (token for some downloads)","p":"n/a","b":"Hubble, JWST, TESS, Kepler observation archives","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA ADS (Astrophysics Data System) API","u":"https://ui.adsabs.harvard.edu/help/api/","co":"Harvard","f":"Free w/ key (mandatory registration token)","p":"n/a","b":"Astronomy & physics bibliographic search, metrics, exports","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA Exoplanet Archive (TAP)","u":"https://exoplanetarchive.ipac.caltech.edu/docs/program_interfaces.html","co":"Caltech","f":"Free, keyless (TAP/ADQL)","p":"n/a","b":"Confirmed exoplanet & host-star parameter tables","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA HEASARC Xamin API","u":"https://heasarc.gsfc.nasa.gov/docs/xamin-api.html","co":"NASA","f":"Free, keyless (REST/VO)","p":"n/a","b":"High-energy X-ray/gamma-ray astrophysics catalogs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NASA Open APIs (APOD, NeoWs, DONKI, EPIC)","u":"https://api.nasa.gov/","co":"NASA","f":"Free w/ key (DEMO_KEY keyless, limited)","p":"n/a","b":"Astronomy imagery, near-Earth objects, space weather","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"NASA/IPAC Extragalactic Database (NED)","u":"https://ned.ipac.caltech.edu/","co":"Caltech","f":"Free, keyless (VO + web API)","p":"n/a","b":"Cross-IDs, redshifts & data for extragalactic objects","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NASA/IPAC Infrared Science Archive (IRSA TAP)","u":"https://irsa.ipac.caltech.edu/TAP/","co":"Caltech","f":"Free, keyless (TAP/ADQL)","p":"n/a","b":"WISE, 2MASS, Spitzer, ZTF infrared catalogs/images","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIST Atomic Spectra Database (ASD)","u":"https://physics.nist.gov/PhysRefData/ASD/lines_form.html","co":"NIST","f":"Free, keyless (form/URL queries)","p":"n/a","b":"Atomic energy levels & spectral line transitions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST Fundamental Physical Constants (CODATA)","u":"https://physics.nist.gov/cuu/Constants/","co":"NIST","f":"Free, keyless (downloadable datasets)","p":"n/a","b":"CODATA recommended values of physical constants","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Notify (ISS / People in Space)","u":"http://open-notify.org/Open-Notify-API/","co":"Open notify","f":"Free, keyless","p":"n/a","b":"Live ISS position and astronauts currently in space","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Particle Data Group (PDG) API","u":"https://pdgapi.lbl.gov/doc/restapi.html","co":"Lbl","f":"Free, keyless REST (rate-limited)","p":"n/a","b":"Particle properties from Review of Particle Physics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SDSS SkyServer / CasJobs","u":"https://skyserver.sdss.org/","co":"Sdss","f":"Free, keyless (CasJobs login for batch)","p":"n/a","b":"Sloan survey imaging, spectra & SQL queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIMBAD (CDS Strasbourg)","u":"https://simbad.u-strasbg.fr/simbad/","co":"U strasbg","f":"Free, keyless (TAP/script/HTTP)","p":"n/a","b":"Reference DB identifying 20M+ astronomical objects","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Splatalogue (NRAO Spectral Line Catalog)","u":"https://splatalogue.online/","co":"Splatalogue","f":"Free, keyless (query/VO SLAP)","p":"n/a","b":"Astronomical molecular/atomic spectral line database","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USNO Astronomical Applications API","u":"https://aa.usno.navy.mil/data/api","co":"Navy","f":"Free, keyless","p":"n/a","b":"Sun/moon rise-set, phases, eclipses, sidereal time","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"VAMDC (Virtual Atomic and Molecular Data Centre)","u":"https://portal.vamdc.eu/","co":"Vamdc","f":"Free, keyless (VAMDC-TAP/SLAP)","p":"n/a","b":"Federated atomic & molecular spectroscopy/collision data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"VizieR (CDS Strasbourg)","u":"https://vizier.cds.unistra.fr/","co":"Unistra","f":"Free, keyless (TAP/VO/HTTP)","p":"n/a","b":"Library of ~24,000 published astronomical catalogues","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Political science & International relations","count":27,"entries":[{"n":"ACLED (Armed Conflict Location & Event Data)","u":"https://acleddata.com/api-documentation/getting-started","co":"Acleddata","f":"Free w/ registration + access key (capped use)","p":"Custom/enterprise licensing for heavy/commercial use","b":"Real-time political violence & protest events worldwide","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Congress.gov API (Library of Congress)","u":"https://api.congress.gov/","co":"Library of Congress","f":"Free w/ key (via api.data.gov signup)","p":"n/a","b":"US bills, members, votes, nominations, official legislative data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Correlates of War (COW) Project datasets","u":"https://correlatesofwar.org/data-sets/","co":"Correlatesofwar","f":"Free download (no API/key)","p":"n/a","b":"Wars, MIDs, alliances, capabilities, trade, IGOs 1816+","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ECHR HUDOC database","u":"https://hudoc.echr.coe.int/","co":"Coe","f":"Free, keyless web/JSON query interface","p":"n/a","b":"European Court of Human Rights case law & judgments (added in verify)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EUR-Lex / Cellar (EU law)","u":"https://eur-lex.europa.eu/content/help/data-reuse/webservice.html","co":"European Union","f":"Free, keyless SPARQL/Cellar REST endpoint; EUR-Lex webservice needs registration","p":"n/a","b":"EU legislation, treaties, case law metadata (RDF)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"European Parliament Open Data API","u":"https://data.europarl.europa.eu/en/developer-corner/opendata-api","co":"European Union","f":"Free, keyless (open data portal)","p":"n/a","b":"MEPs, plenary documents, votes, EP procedures","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Eurostat API","u":"https://ec.europa.eu/eurostat/web/main/data/web-services","co":"European Commission","f":"Free, keyless REST/JSON-stat & SDMX","p":"n/a","b":"EU socioeconomic, governance, turnout stats (added in verify)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FiveThirtyEight Polls (data downloads)","u":"https://projects.fivethirtyeight.com/polls/","co":"Fivethirtyeight","f":"Free, keyless CSV downloads + GitHub repo","p":"n/a","b":"US election polls, approval, generic ballot, polling averages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FollowTheMoney.org API (NIMP / OpenSecrets)","u":"https://www.followthemoney.org/our-data/apis","co":"Followthemoney","f":"Free w/ myFollowTheMoney account/key","p":"n/a","b":"US state-level campaign finance & lobbying data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Freedom House (Freedom in the World)","u":"https://freedomhouse.org/reports/publication-archives","co":"Freedomhouse","f":"Free download (Excel, no key/API)","p":"n/a","b":"Political rights & civil liberties scores, 1972+","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GDELT Project (DOC 2.0 / Events API)","u":"https://www.gdeltproject.org/data.html","co":"Gdeltproject","f":"Free, keyless (DOC/GEO APIs); free account for GDELT Cloud","p":"n/a","b":"Global news events, conflict, tone, geopolitics monitoring","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Google Civic Information API","u":"https://developers.google.com/civic-information","co":"Google","f":"Free w/ key, up to 25k queries/day","p":"n/a","b":"US voter info, polling places, contests, election officials","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Harvard Dataverse API","u":"https://guides.dataverse.org/en/latest/api/","co":"Dataverse","f":"Free, keyless for public data (key for restricted)","p":"n/a","b":"Hosted poli-sci/IR research datasets, election returns","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Manifesto Project Database (MARPOR)","u":"https://manifesto-project.wzb.eu/information/documents/api","co":"Wzb","f":"Free w/ key (account registration); manifestoR R package","p":"n/a","b":"Party manifestos coded, 1000+ parties, 50+ countries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MIT Election Data + Science Lab (MEDSL)","u":"https://electionlab.mit.edu/data","co":"Mit","f":"Free download via Harvard Dataverse (no key)","p":"n/a","b":"US county/precinct election returns, presidential 1976+","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open States API v3 (Plural)","u":"https://docs.openstates.org/api-v3/","co":"Openstates","f":"Free w/ key; bulk CSV/JSON downloads also free","p":"n/a","b":"US state legislatures: bills, votes, legislators, committees","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenFEC API (Federal Election Commission)","u":"https://api.open.fec.gov/developers/","co":"Fec","f":"Free w/ key (DEMO_KEY also works, rate-limited)","p":"n/a","b":"US federal campaign finance, candidates, committees, filings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ParlGov Database","u":"https://www.parlgov.org/","co":"Parlgov","f":"Free download (no key); parties, elections, cabinets","p":"n/a","b":"Parties, elections, cabinets for EU/OECD democracies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Polity5 (Center for Systemic Peace) regime data","u":"https://www.systemicpeace.org/inscrdata.html","co":"Systemicpeace","f":"Free download (Excel/SPSS, no key)","p":"n/a","b":"Polity regime authority scores, 1800+ (added in verify)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Military Expenditure Database","u":"https://www.sipri.org/databases/milex","co":"Sipri","f":"Free download (Excel, no key/API)","p":"n/a","b":"National military spending time series 1949+","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCDP (Uppsala Conflict Data Program) API","u":"https://ucdp.uu.se/apidocs/","co":"Uu","f":"Free, keyless (token optional for live systems)","p":"n/a","b":"Organized violence, armed conflict events, fatalities 1946+","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UK Parliament APIs (developer.parliament.uk)","u":"https://developer.parliament.uk/","co":"Parliament","f":"Free, keyless (Members, Bills, Divisions, Questions)","p":"n/a","b":"UK MPs, bills, Commons/Lords votes, committees","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UN Comtrade Database API","u":"https://comtradedeveloper.un.org/","co":"United Nations","f":"Free w/ key: 100k records/call, 500 calls/day","p":"Premium subscription for higher limits","b":"Bilateral international trade flows, 200+ countries 1962+ (added in verify)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UN Treaty Collection","u":"https://treaties.un.org/","co":"United Nations","f":"Free, keyless web database (no documented public API)","p":"n/a","b":"Multilateral treaty status, ratifications, UN Treaty Series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UNODA Treaties Database","u":"https://treaties.unoda.org/","co":"Unoda","f":"Free, keyless web database (disarmament treaties)","p":"n/a","b":"Arms control / disarmament treaty status & signatories","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"V-Dem (Varieties of Democracy) Dataset","u":"https://www.v-dem.net/data/the-v-dem-dataset/","co":"V dem","f":"Free download; vdemdata R package (no API/key)","p":"n/a","b":"Democracy indices, 600+ indicators, 202 countries 1789+","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"World Bank Worldwide Governance Indicators (WGI)","u":"https://www.worldbank.org/en/publication/worldwide-governance-indicators","co":"World Bank","f":"Free, keyless (via World Bank DataBank/API)","p":"n/a","b":"Governance: rule of law, corruption, stability, 214 economies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Preprint servers","count":25,"entries":[{"n":"arXiv API (Query + OAI-PMH)","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless","p":"n/a","b":"Physics, math, CS, quant preprints search and metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"arXiv Bulk Data Access","u":"https://info.arxiv.org/help/bulk_data.html","co":"arXiv","f":"Free metadata; full-text PDFs via AWS S3 requester-pays","p":"AWS S3 requester-pays transfer fees","b":"Bulk download of full arXiv corpus + metadata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"bioRxiv API","u":"https://api.biorxiv.org/","co":"bioRxiv","f":"Free, keyless","p":"n/a","b":"Biology preprint metadata, content + published-version detail","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ChemRxiv Public API (Cambridge Open Engage)","u":"https://chemrxiv.org/engage/chemrxiv/public-api/docs","co":"Chemrxiv","f":"Free, keyless","p":"n/a","b":"Chemistry preprints search, items and categories","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key (rate-limited)","p":"Custom paid plans for higher throughput","b":"Aggregated OA full text from repositories incl. preprints","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API (posted-content)","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless; polite pool w/ email","p":"Crossref Metadata Plus paid tier for higher SLA","b":"Preprint DOIs, metadata, preprint-to-published links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless","p":"n/a","b":"Preprint DOIs/metadata for DataCite-minting servers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOAPR (Directory of Open Access Preprint Repositories)","u":"https://doapr.coar-repositories.org/","co":"Coar repositories","f":"Free directory (browse; no formal REST API)","p":"n/a","b":"Discovering preprint servers and their access methods","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EarthArXiv API (via OSF)","u":"https://github.com/eartharxiv/API","co":"Eartharxiv","f":"Free, keyless (OSF backend)","p":"n/a","b":"Geoscience preprint metadata and downloads","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Europe PMC RESTful API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Cross-server preprint + life-science full text search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HAL API (Archives Ouvertes)","u":"https://api.archives-ouvertes.fr/docs","co":"Archives ouvertes","f":"Free, keyless","p":"n/a","b":"French multidisciplinary open archive + preprints","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"medRxiv API","u":"https://api.medrxiv.org/","co":"medRxiv","f":"Free, keyless","p":"n/a","b":"Health sciences preprint metadata and published links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NCBI E-utilities (PubMed/PMC)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25497/","co":"NCBI (NIH)","f":"Free; 3 req/s keyless, 10 req/s w/ free key","p":"n/a","b":"PubMed/PMC incl. indexed preprint citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless; 100k req/day (polite pool w/ email)","p":"OpenAlex Premium for higher limits/faster updates","b":"Type=preprint works across all servers, dedup","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations API","u":"https://opencitations.net/index/api/v2","co":"Opencitations","f":"Free, keyless","p":"n/a","b":"Open citation links incl. preprint-to-article citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OSF API v2 (OSF Preprints)","u":"https://developer.osf.io/","co":"Osf","f":"Free; keyless reads ~100 req/min, more w/ token","p":"n/a","b":"OSF-hosted preprint providers metadata and files","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Preprints.org API (MDPI)","u":"https://www.preprints.org/apiclient/new","co":"Preprints","f":"Free w/ registered API client","p":"n/a","b":"Multidisciplinary MDPI preprint metadata access","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PREreview API","u":"https://content.prereview.org/api/","co":"Prereview","f":"Free, keyless","p":"n/a","b":"Community preprint reviews and rapid feedback metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Research Square JSON API","u":"https://www.researchsquare.com/request-api","co":"Researchsquare","f":"Free on request/approval (Crossref/Europe PMC also expose it)","p":"n/a","b":"Research Square preprint metadata (DOI 10.21203)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sciety (preprint evaluations)","u":"https://sciety.org/","co":"Sciety","f":"Free; data via public docmaps/feeds","p":"n/a","b":"Aggregated preprint reviews/evaluations across groups","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free, keyless (shared low rate limit); free key for higher limits","p":"n/a","b":"Papers + arXiv preprints, citations, embeddings","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"TechRxiv / Authorea","u":"https://www.techrxiv.org/","co":"Techrxiv","f":"Free metadata via Crossref/OpenAlex; no documented public API","p":"n/a","b":"Engineering/CS preprints (IEEE-affiliated)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free, keyless (email param required)","p":"Data feed/snapshot for bulk uses","b":"Locating OA full-text incl. preprint versions by DOI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Zenodo REST API","u":"https://developers.zenodo.org/","co":"Zenodo (CERN)","f":"Free; read open, write/deposit needs free token","p":"n/a","b":"CERN-hosted preprints, datasets, software records","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"SSRN (Elsevier preprint server)","u":"https://www.elsevier.com/products/ssrn-preprint-services","co":"Elsevier","f":"none (no public API; metadata via Crossref/Europe PMC)","p":"Scopus/Elsevier API subscription","b":"Social science preprints; metadata via Crossref","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Prompt/agent memory & state stores","count":23,"entries":[{"n":"Cloudflare Agents (Durable Objects state)","u":"https://developers.cloudflare.com/agents/concepts/conversation-state-and-memory/","co":"Cloudflare","f":"Workers/Durable Objects free tier; OSS agents SDK; SQLite-backed state per agent","p":"Workers Paid $5/mo (then DO usage-based)","b":"Per-agent stateful memory via Durable Objects + embedded SQLite","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cognee","u":"https://github.com/topoteretes/cognee","co":"Topoteretes","f":"Open-source (Apache-2.0), self-host free; free cloud tier (developer)","p":"Cloud Developer $35/mo; Team $200/mo (usage credits)","b":"Graph + vector memory via extract-cognify-load pipeline","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GPTCache (Zilliz)","u":"https://github.com/zilliztech/GPTCache","co":"Zilliztech","f":"Open-source (MIT), fully free; self-hosted","p":"n/a","b":"Semantic caching of LLM responses to cut cost","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Graphlit","u":"https://www.graphlit.com/","co":"Graphlit","f":"Free tier: 100 credits/mo, no credit card","p":"Usage-based at $0.10/credit (Starter/Professional flat plans)","b":"Multimodal graph memory with cited retrieval","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Helicone","u":"https://www.helicone.ai/pricing","co":"Helicone","f":"Free tier: 10K requests/mo (7-day retention); OSS self-host (Apache-2.0) free","p":"$79/mo (Pro)","b":"LLM gateway with caching and observability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LangGraph (persistence / checkpointers)","u":"https://docs.langchain.com/oss/python/langgraph/persistence","co":"LangChain","f":"OSS checkpointers free (SQLite/Postgres/Redis); free dev plan on platform","p":"Usage-based (LangGraph Platform Plus/Enterprise)","b":"Durable agent state checkpointing and threads","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"LangMem SDK (LangChain)","u":"https://langchain-ai.github.io/langmem/","co":"LangChain","f":"Open-source SDK, free; backend-agnostic stores","p":"n/a (runs on LangGraph Platform if hosted)","b":"Semantic/episodic/procedural memory for any agent","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Letta (formerly MemGPT)","u":"https://docs.letta.com/","co":"Letta","f":"Free cloud tier (3 agents, 5K credits/mo, BYOK); OSS self-host fully free","p":"$20/mo Pro (unlimited agents + $20 API credits)","b":"Stateful agents with self-editing memory blocks","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mem0","u":"https://mem0.ai/pricing","co":"Mem0","f":"Free Hobby tier: 10K memories, 1K retrieval calls/mo; OSS self-host free","p":"$19/mo Starter (50K memories, 5K retrievals)","b":"Managed long-term memory layer for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Memary","u":"https://github.com/kingjulio8238/Memary","co":"Kingjulio8238","f":"Open-source (MIT), self-host free","p":"n/a","b":"Knowledge-graph long-term memory for autonomous agents","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Membase MCP (Unibase)","u":"https://github.com/unibaseio/membase-mcp","co":"Unibaseio","f":"Open-source MCP gateway, free; decentralized DA storage (testnet)","p":"n/a (on-chain / Unibase DA network usage)","b":"Decentralized verifiable multi-session agent memory","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Memobase","u":"https://www.memobase.io/","co":"Memobase","f":"Open-source core (memodb-io), self-host free; free cloud tier","p":"Usage-based cloud (custom)","b":"User-profile-based long-term memory for chatbots","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Microsoft Agent Framework (pluggable stores)","u":"https://github.com/microsoft/agent-framework","co":"Microsoft","f":"Open-source SDK (MIT), free; pluggable persistent thread/chat-history stores","p":"n/a","b":"Pluggable chat-history/thread persistence layers (.NET & Python)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenAI Agents SDK Sessions","u":"https://openai.github.io/openai-agents-python/sessions/","co":"OpenAI","f":"Open-source SDK, free; SQLite/Redis/SQLAlchemy/MongoDB backends","p":"n/a (LLM tokens billed separately)","b":"Built-in conversation session persistence for agents","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pinecone Assistant","u":"https://docs.pinecone.io/guides/assistant/pricing-and-limits","co":"Pinecone","f":"Starter free: 1GB files, ~500K chat input + 300K output tokens/mo","p":"$20/mo Builder plan (then $5 per 1M context tokens on Standard)","b":"Managed retrieval-backed assistant memory","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Redis Agent Memory Server","u":"https://github.com/redis/agent-memory-server","co":"Redis","f":"Open-source (Apache-2.0), free; REST + MCP + Python client","p":"n/a (runs on self-hosted/Cloud Redis)","b":"Working + long-term agent memory on Redis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Redis LangCache","u":"https://redis.io/docs/latest/develop/ai/langcache/","co":"Redis","f":"Free during public preview ($0); free Redis Cloud tier available","p":"Consumption-based (GA pricing TBD)","b":"Managed semantic cache to reuse LLM answers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Supermemory","u":"https://supermemory.ai/docs","co":"Supermemory","f":"Free developer tier; OSS plugins/integrations","p":"Usage-based (custom)","b":"Single-API memory, managed RAG and user profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Upstash Redis","u":"https://upstash.com/docs/redis/tutorials/agent_memory","co":"Upstash","f":"Free tier (serverless Redis); pay-as-you-go beyond","p":"Pay-as-you-go (per-command pricing) / Fixed plans","b":"Serverless KV store for agent session/working memory","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vercel AI SDK (chatbot message persistence)","u":"https://sdk.vercel.ai/docs/ai-sdk-ui/storing-messages","co":"Vercel","f":"Open-source (MIT) SDK, free; pluggable storage (Redis/Postgres/Turso)","p":"n/a","b":"Chat message persistence in JS/TS apps","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Zep","u":"https://www.getzep.com/","co":"Getzep","f":"Free tier (~1,000 credits/mo for prototyping); Graphiti OSS framework free","p":"Usage/seat-based (Flex/Cloud paid plans)","b":"Temporal knowledge-graph memory for agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AWS Bedrock AgentCore Memory","u":"https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/memory.html","co":"AWS","f":"none (AWS usage-based; new-account credits may apply)","p":"Usage-based (per memory event/storage; AWS pricing)","b":"Fully managed short- + long-term memory for agents","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"},{"n":"OpenAI Assistants / Threads API","u":"https://platform.openai.com/docs/assistants/overview","co":"OpenAI","f":"none (pay-per-token; vector storage billed)","p":"Tokens + $0.10/GB/day vector storage","b":"Server-side persistent threads/tool state (deprecating -> Responses API)","s":"Available","fr":0,"kl":0,"kr":1,"cf":"h"}]},{"category":"Psychology & Cognitive science","count":28,"entries":[{"n":"Allen Brain Atlas API","u":"https://brain-map.org/support/documentation","co":"Brain map","f":"Free, keyless (RMA queries, /api/v2/data)","p":"n/a","b":"Brain gene expression, atlases, microarray/ISH data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CDC BRFSS / data.cdc.gov (Socrata)","u":"https://dev.socrata.com/foundry/data.cdc.gov/","co":"Socrata","f":"Free, keyless (app token boosts limits)","p":"n/a","b":"US behavioral risk & mental-health prevalence statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"childes-db / childesr API","u":"https://childes-db.stanford.edu/","co":"Stanford","f":"Free, keyless (R childesr / Python childespy / web)","p":"n/a","b":"Child language acquisition transcripts and tokens","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Cognitive Atlas API","u":"https://www.cognitiveatlas.org/api","co":"Cognitiveatlas","f":"Free, keyless (GET-only REST)","p":"n/a","b":"Ontology of cognitive concepts, tasks, disorders","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ConceptNet API","u":"https://github.com/commonsense/conceptnet5/wiki/API","co":"Commonsense","f":"Free, keyless (rate-limited ~3600/hr)","p":"n/a","b":"Commonsense semantic relations between words/concepts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Datamuse API","u":"https://www.datamuse.com/api/","co":"Datamuse","f":"Free, keyless (up to 100k req/day)","p":"n/a","b":"Word-finding, semantic/sound/spelling relations, psycholinguistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"English Lexicon Project (ELP)","u":"https://elexicon.wustl.edu/","co":"Wustl","f":"Free, keyless (web search + downloads)","p":"n/a","b":"Lexical decision/naming reaction-time norms for 40k words","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GBIF / iNaturalist","u":"https://gbif.org/","co":"GBIF","f":"Free, keyless","p":"n/a","b":"Biodiversity (already in catalog, context only)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Glasgow Norms","u":"https://link.springer.com/article/10.3758/s13428-018-1099-3","co":"Springer","f":"Free, keyless (supplementary dataset download)","p":"n/a","b":"Norms for 5500 words across 9 psycholinguistic dimensions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ICPSR / openICPSR","u":"https://www.openicpsr.org/","co":"Openicpsr","f":"Free w/ account login for most downloads","p":"n/a","b":"Archived social-science & psychology research datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MRC Psycholinguistic Database","u":"https://websites.psychology.uwa.edu.au/school/mrcdatabase/uwa_mrc.htm","co":"Uwa","f":"Free, keyless (web query + download)","p":"n/a","b":"Word norms: imageability, concreteness, frequency, AoA","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NeuroQuery","u":"https://neuroquery.org/","co":"Neuroquery","f":"Free, keyless (web + Python)","p":"n/a","b":"Predicting brain activation maps from neuroscience terms","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Neurosynth / NiMARE","u":"https://neurosynth.org/","co":"Neurosynth","f":"Free, keyless (data dumps + Python)","p":"n/a","b":"Automated fMRI meta-analysis and term-based decoding","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NeuroVault REST API","u":"https://neurovault.org/api-docs","co":"Neurovault","f":"Free, keyless reads","p":"n/a","b":"Sharing/querying unthresholded brain statistical maps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open-Source Psychometrics Project","u":"https://openpsychometrics.org/_rawdata/","co":"Openpsychometrics","f":"Free, keyless (raw CSV downloads, no API)","p":"n/a","b":"Raw personality/psychometric test response datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"openFDA","u":"https://open.fda.gov/","co":"openFDA","f":"Free, keyless (key raises limits)","p":"n/a","b":"Drug/adverse-event data incl psychiatric meds (already in catalog)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenNeuro API","u":"https://openneuro.org/","co":"Openneuro","f":"Free, keyless (GraphQL API, CLI, DataLad; CC0)","p":"n/a","b":"Open MRI/EEG/MEG/iEEG/PET brain datasets (BIDS)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OSF (Open Science Framework) APIv2","u":"https://developer.osf.io/","co":"Osf","f":"Free; public reads keyless, writes need OAuth2/token","p":"n/a","b":"Psych project metadata, preregistrations, file storage","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Pavlovia (PsychoPy/jsPsych hosting)","u":"https://pavlovia.org/","co":"Pavlovia","f":"Free piloting/local runs; data export via GitLab","p":"100 credits/EUR100 (per-participant run) or GBP1800/yr site license","b":"Hosting online behavioral experiments, data collection","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Project Implicit (IAT public datasets)","u":"https://osf.io/y9hiq/","co":"Osf","f":"Free, keyless (annual IAT datasets via OSF)","p":"n/a","b":"Implicit Association Test response data at scale","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PsyArXiv (OSF Preprints)","u":"https://share.osf.io/","co":"Osf","f":"Free; OSF/SHARE API keyless public reads","p":"n/a","b":"Psychology preprints metadata and full-text discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SAMHSA / SAMHDA","u":"https://www.datafiles.samhsa.gov/","co":"Samhsa","f":"Free, keyless (public-use data files + online analysis)","p":"n/a","b":"US mental-health & substance-use survey microdata (NSDUH)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Small World of Words (SWOW)","u":"https://smallworldofwords.org/en/project/research","co":"Smallworldofwords","f":"Free, keyless dataset downloads (no live API)","p":"n/a","b":"Large-scale free word-association norms, many languages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TalkBank","u":"https://talkbank.org/","co":"Talkbank","f":"Free, keyless (downloads + browser)","p":"n/a","b":"Multilingual spoken-language corpora across communication subfields","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"VADER / AFINN sentiment lexicons (NLTK/PyPI)","u":"https://github.com/cjhutto/vaderSentiment","co":"Cjhutto","f":"Free, keyless (open-source lexicon libraries)","p":"n/a","b":"Affective/sentiment lexicons for psych text analysis","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WHO Global Health Observatory (GHO) OData API","u":"https://www.who.int/data/gho/info/gho-odata-api","co":"WHO","f":"Free, keyless (OData)","p":"n/a","b":"Global mental-health indicators and workforce stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wordbank (wordbankr)","u":"https://wordbank.stanford.edu/","co":"Stanford","f":"Free, keyless (R wordbankr API + web)","p":"n/a","b":"Developmental vocabulary CDI norms across 40+ languages","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WordNet (Princeton / NLTK)","u":"https://wordnet.princeton.edu/","co":"Princeton","f":"Free, keyless (downloadable DB / NLTK)","p":"n/a","b":"Psycholinguistic lexical-semantic network of English","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Public health & Epidemiology","count":26,"entries":[{"n":"CDC Environmental Public Health Tracking Network API","u":"https://ephtracking.cdc.gov/","co":"U.S. CDC","f":"Free, keyless","p":"n/a","b":"Environmental health, asthma, lead, heat, water indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CDC Open Data (data.cdc.gov / Socrata SODA)","u":"https://dev.socrata.com/foundry/data.cdc.gov","co":"Socrata","f":"Free, keyless (rate-limited); higher limits w/ free app token","p":"n/a","b":"Hundreds of CDC datasets: NNDSS, vaccinations, mortality, STDs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CDC PLACES (Local Data for Better Health)","u":"https://www.cdc.gov/places/","co":"U.S. CDC","f":"Free, keyless (via Socrata SODA)","p":"n/a","b":"Local/county/census-tract chronic disease prevalence estimates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CDC WONDER API","u":"https://wonder.cdc.gov/wonder/help/wonder-api.html","co":"U.S. CDC","f":"Free, keyless (XML POST, national data only)","p":"n/a","b":"Mortality, natality, cancer, notifiable disease national queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ClinicalTrials.gov API v2","u":"https://clinicaltrials.gov/data-api/api","co":"ClinicalTrials.gov","f":"Free, keyless","p":"n/a","b":"Global clinical trial registry: studies, interventions, conditions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Delphi Epidata API (CMU, incl. FluView/COVIDcast)","u":"https://cmu-delphi.github.io/delphi-epidata/","co":"Cmu delphi","f":"Free; anonymous access, free API key for higher limits","p":"n/a","b":"US influenza/COVID surveillance signals and nowcasts","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"disease.sh (Open Disease Data)","u":"https://disease.sh/","co":"Disease","f":"Free, keyless","p":"n/a","b":"COVID-19 and influenza stats by country/region, JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ECDC Surveillance Atlas / downloadable datasets","u":"https://atlas.ecdc.europa.eu/public/","co":"European Union","f":"Free, keyless (interactive atlas + CSV downloads; no formal REST API)","p":"n/a","b":"EU/EEA infectious disease surveillance and AMR data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GBD Results Tool (IHME, Global Burden of Disease)","u":"https://vizhub.healthdata.org/gbd-results/","co":"Healthdata","f":"Free w/ account (web tool + bulk CSV download)","p":"n/a","b":"Global burden estimates: deaths, DALYs, risk factors by country","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"HealthData.gov (HHS open data, Socrata)","u":"https://healthdata.gov/","co":"Data.gov","f":"Free, keyless (Socrata SODA API)","p":"n/a","b":"US HHS health datasets: hospital capacity, COVID, programs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HealthMap","u":"https://healthmap.org/","co":"Healthmap","f":"Free, keyless (public maps/feeds; no formal documented API)","p":"n/a","b":"Real-time global outbreak monitoring from news/ProMED feeds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MedlinePlus Connect / Health Topics API","u":"https://medlineplus.gov/about/developers/webservices/","co":"Medlineplus","f":"Free, keyless","p":"n/a","b":"Consumer health topic content keyed to conditions/codes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Nextstrain / nextstrain.org pathogen builds","u":"https://docs.nextstrain.org/en/latest/reference/data-formats.html","co":"Nextstrain","f":"Free, keyless (public datasets/JSON via data.nextstrain.org)","p":"n/a","b":"Real-time pathogen phylogenetics and genomic epidemiology","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NLM Clinical Table Search Service","u":"https://clinicaltables.nlm.nih.gov/","co":"NLM (NIH)","f":"Free, keyless","p":"n/a","b":"ICD-10/ICD-11, conditions, diseases code autocomplete/search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NLM RxNorm / RxNav API","u":"https://lhncbc.nlm.nih.gov/RxNav/APIs/RxNormAPIs.html","co":"NLM (NIH)","f":"Free, keyless","p":"n/a","b":"Normalized drug names and clinical drug terminology","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"openFDA Drug Adverse Events (FAERS)","u":"https://open.fda.gov/apis/drug/event/","co":"openFDA","f":"Free, keyless (240/min); free key for higher limits","p":"n/a","b":"Pharmacovigilance, drug adverse event surveillance","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Our World in Data API","u":"https://docs.owid.io/projects/etl/api/","co":"Owid","f":"Free, keyless","p":"n/a","b":"Global COVID, vaccination, mortality and health chart data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ProMED (ISID) API","u":"https://docs.promedmail.org/api","co":"Promedmail","f":"Free w/ API key (Bearer token; rate-limited tiers); web/email alerts free keyless","p":"n/a","b":"Expert-curated emerging infectious disease outbreak alerts","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"RKI SurvStat@RKI 2.0 web service","u":"https://tools.rki.de/SurvStat/SurvStatWebService.svc","co":"Rki","f":"Free, keyless (SOAP/WCF web service; WSDL at ?wsdl)","p":"n/a","b":"German notifiable infectious disease surveillance time series","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UKHSA / OHID Fingertips Public Health API","u":"https://fingertips.phe.org.uk/api","co":"Phe","f":"Free, keyless (JSON/CSV)","p":"n/a","b":"England public health profiles, indicators, health protection","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UNAIDS AIDSinfo","u":"https://aidsinfo.unaids.org/","co":"Unaids","f":"Free, keyless (web tool + bulk data export)","p":"n/a","b":"Global HIV/AIDS epidemiology, treatment coverage by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"VAERS (Vaccine Adverse Event Reporting System) via CDC WONDER","u":"https://wonder.cdc.gov/vaers.html","co":"U.S. CDC","f":"Free, keyless (WONDER query + bulk CSV)","p":"n/a","b":"US vaccine adverse event surveillance reports","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO Data360 (World Bank-hosted WHO GHO mirror)","u":"https://data360.worldbank.org/en/api","co":"World Bank","f":"Free, keyless (Data360 API)","p":"n/a","b":"WHO GHO indicators via World Bank Data360 API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO Global Health Observatory (GHO) OData API","u":"https://www.who.int/data/gho/info/gho-odata-api","co":"WHO","f":"Free, keyless","p":"n/a","b":"Global health indicators by country: mortality, disease, risk factors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO Global Malaria Programme data (GHO themes)","u":"https://www.who.int/data/gho/data/themes/malaria","co":"WHO","f":"Free, keyless (via GHO OData)","p":"n/a","b":"Malaria cases, deaths, intervention coverage by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHO ICD-11 API","u":"https://icd.who.int/icdapi","co":"WHO","f":"Free w/ registration (OAuth2 client credentials)","p":"n/a","b":"Disease classification, coding, multilingual ICD-11 lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"}]},{"category":"Public transit & mobility (GTFS)","count":24,"entries":[{"n":"511.org SF Bay Area Open Data","u":"https://511.org/open-data/transit","co":"511","f":"Free w/ token (default 60 req/hour)","p":"n/a","b":"Bay Area regional transit GTFS, GTFS-RT & SIRI feeds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BART API (Bay Area Rapid Transit)","u":"https://api.bart.gov/docs/overview/index.aspx","co":"Bart","f":"Free; shared public demo key (no registration needed)","p":"n/a","b":"BART real-time departures, routes, advisories, fares","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Deutsche Bahn DB API Marketplace (Timetables)","u":"https://developers.deutschebahn.com/db-api-marketplace/apis/product/timetables","co":"Deutschebahn","f":"Free 'Nutzungsplan Free' w/ key (Client ID/Secret), rate-limited","p":"n/a","b":"German rail timetables, stations, station facilities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Entur API (Norway national)","u":"https://developer.entur.org/","co":"Entur","f":"Free, keyless (requires ET-Client-Name header)","p":"n/a","b":"Norway national journey planning, NeTEx/SIRI, GraphQL","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GraphHopper","u":"https://docs.graphhopper.com/","co":"Graphhopper","f":"Free dev plan w/ key (non-commercial, limited credits/min)","p":"Standard subscription (~15k credits/day) and up","b":"Routing, matrix, route optimization, isochrones","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"HERE Public Transit API","u":"https://www.here.com/docs/bundle/public-transit-api-developer-guide/page/README.html","co":"HERE","f":"Free w/ key, ~5000 transactions/mo","p":"$2.50 per 1000 transactions above free tier","b":"Global transit routing, next departures, station search","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mapbox Directions / Navigation API","u":"https://docs.mapbox.com/api/navigation/directions/","co":"Mapbox","f":"Free w/ key, 100k requests/mo","p":"$2.00 per 1000 requests (100k-500k tier)","b":"Driving/walking/cycling directions, matrix, isochrones","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mobility Database (MobilityData)","u":"https://mobilitydatabase.org/","co":"Mobilitydatabase","f":"Free w/ token, public API","p":"n/a","b":"Catalog of 6000+ GTFS/GTFS-RT/GBFS feeds in 99+ countries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MobilityData GBFS systems.csv catalog","u":"https://github.com/MobilityData/gbfs/blob/master/systems.csv","co":"MobilityData","f":"Free, keyless (public CSV + live feeds)","p":"n/a","b":"Global catalog of ~1500 live bikeshare/scooter GBFS feeds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MTA (NY) Real-Time Data Feeds","u":"https://api.mta.info/","co":"Mta","f":"Free, keyless GTFS-RT feeds (subway/rail)","p":"n/a","b":"NYC subway/LIRR/Metro-North GTFS-Realtime trip updates & alerts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Navitia.io (Hove/Kisio)","u":"https://doc.navitia.io/","co":"Navitia","f":"Free w/ key for open coverage regions + sandbox token","p":"Paid for higher volume / private data","b":"Multimodal journeys, schedules, isochrones over GTFS","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenRouteService","u":"https://openrouteservice.org/dev/#/api-docs","co":"Openrouteservice","f":"Free w/ key, ~2000 directions req/day (40/min)","p":"Paid plans for higher quotas","b":"Directions, isochrones, matrix on OSM data, many profiles","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenTransportData Swiss","u":"https://opentransportdata.swiss/en/","co":"Opentransportdata","f":"Free w/ token (via API Manager); GTFS/GTFS-RT/SIRI","p":"n/a","b":"Switzerland national transit datasets and real-time feeds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenTripPlanner (OTP)","u":"https://docs.opentripplanner.org/en/latest/apis/Apis/","co":"Opentripplanner","f":"Free, open source (self-host); GTFS+GBFS multimodal","p":"n/a","b":"Multimodal transit+bike+walk trip planning via GraphQL over GTFS","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OSRM (Open Source Routing Machine)","u":"https://project-osrm.org/docs/v5.24.0/api/","co":"Project osrm","f":"Free keyless demo server (~1 req/s fair use); self-host OSS","p":"n/a","b":"Fast car/bike/foot routing, distance matrix, map matching","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TfL Unified API (Transport for London)","u":"https://api.tfl.gov.uk/","co":"UK Government","f":"Free w/ key (app_key), generous limits","p":"n/a","b":"London tube/bus/bike status, arrivals, journey planning","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"TomTom Routing API","u":"https://developer.tomtom.com/routing-api/documentation/tomtom-maps/product-information/introduction","co":"Tomtom","f":"Free w/ key, 2500 non-tile requests/day (Freemium)","p":"Pay-as-you-grow above free","b":"Traffic-aware vehicle routing, ETA, matrix routing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transitland (Interline)","u":"https://www.transit.land/documentation/rest-api/","co":"Transit","f":"Free w/ API key, rate-limited free tier (REST + GraphQL)","p":"Pro tier (higher quotas) / custom","b":"Aggregated global GTFS/GTFS-RT feed registry, stops, routes, schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transitous / MOTIS","u":"https://transitous.org/api/","co":"Transitous","f":"Free, keyless community service (best-effort; send User-Agent)","p":"n/a","b":"Provider-neutral global public-transit routing & isochrones over open GTFS","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Transport for NSW Open Data Hub","u":"https://opendata.transport.nsw.gov.au/","co":"Nsw","f":"Free w/ key (Bronze plan: 60k calls/day, 5 req/s)","p":"n/a","b":"Sydney/NSW GTFS & GTFS-RT for trains, buses, ferries, metro, light rail","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"transport.data.gouv.fr (France national access point)","u":"https://transport.data.gouv.fr/","co":"Gouv","f":"Free, keyless open data + API","p":"n/a","b":"France national GTFS/GBFS/SIRI/NeTEx mobility datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TransportAPI (UK)","u":"https://developer.transportapi.com/","co":"Transportapi","f":"Free 'Home use' plan w/ key, 30 hits/day","p":"Paid tiers for higher volume","b":"UK bus/tube/train live + timetable data and stop identifiers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Valhalla (routing engine)","u":"https://valhalla.github.io/valhalla/api/","co":"Valhalla","f":"Free OSS self-host; public FOSSGIS demo (valhalla.openstreetmap.de)","p":"n/a","b":"Tiled multimodal routing, isochrones, matrix, elevation, map matching","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WMATA API (DC Metro)","u":"https://developer.wmata.com/","co":"Wmata","f":"Free w/ key","p":"n/a","b":"DC Metrorail/bus predictions, GTFS, incidents, station data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Renewable energy & Carbon markets","count":23,"entries":[{"n":"Carbon Interface API","u":"https://docs.carboninterface.com/","co":"Carboninterface","f":"Free w/ key (no card)","p":"Paid usage tiers","b":"Scope-2 electricity & activity CO2 estimates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CarbonPlan OffsetsDB API","u":"https://github.com/carbonplan/offsets-db-api","co":"Carbonplan","f":"Free, open (FastAPI; hosted + CC data)","p":"n/a","b":"Harmonized carbon offset projects & credits across registries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Climate TRACE API (v4, beta)","u":"https://climatetrace.org/data","co":"Climatetrace","f":"Free, open (CC BY 4.0)","p":"n/a","b":"Asset-level global GHG emissions inventory","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Climatiq API","u":"https://www.climatiq.io/docs","co":"Climatiq","f":"Free developer tier w/ key","p":"Paid plans (quote)","b":"Emission factor database & CO2e calculations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cloverly API","u":"https://cloverly.com/api","co":"Cloverly","f":"Free sandbox/dev key","p":"Pay per credit purchased","b":"Programmatic carbon credit catalog & purchase/retirement","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EIA Open Data API v2","u":"https://www.eia.gov/opendata/","co":"U.S. EIA","f":"Free w/ key","p":"n/a","b":"US renewable generation & hourly grid by source","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Electricity Maps API","u":"https://www.electricitymaps.com/free-tier-api","co":"Electricitymaps","f":"Free tier: 1 zone, 50 req/hr, non-commercial","p":"Paid commercial plans (quote)","b":"Global grid carbon intensity, real-time & forecast","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ENTSO-E Transparency Platform API","u":"https://transparency.entsoe.eu/","co":"Entsoe","f":"Free w/ token (email request)","p":"n/a","b":"Pan-European generation, load & market data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPA eGRID","u":"https://www.epa.gov/egrid","co":"U.S. EPA","f":"Free bulk data, keyless (Power Profiler)","p":"n/a","b":"US power plant emission rates & grid resource mix","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Global Solar Atlas (World Bank / Solargis)","u":"https://globalsolaratlas.info/download","co":"Globalsolaratlas","f":"Free download/GeoTIFF, keyless","p":"n/a","b":"Worldwide solar resource & PV potential maps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Global Wind Atlas (DTU / World Bank)","u":"https://globalwindatlas.info/download/gis-files","co":"Globalwindatlas","f":"Free download/GeoTIFF, keyless","p":"n/a","b":"Worldwide wind speed & power density data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GridStatus.io API","u":"https://www.gridstatus.io/","co":"Gridstatus","f":"Free OSS Python lib; hosted free tier 250 calls/mo","p":"Paid hosted API plans","b":"US/Canada ISO fuel mix, load & LMP data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NREL NSRDB (National Solar Radiation Database) API","u":"https://developer.nrel.gov/docs/solar/nsrdb/","co":"NREL","f":"Free w/ key","p":"n/a","b":"Satellite-derived solar irradiance time-series (GHI/DNI/DHI)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NREL REopt API","u":"https://developer.nrel.gov/docs/energy-optimization/reopt/","co":"NREL","f":"Free w/ key (open source available)","p":"n/a","b":"Optimal renewable/storage techno-economic system sizing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NREL WIND Toolkit (HSDS)","u":"https://developer.nrel.gov/docs/wind/wind-toolkit/","co":"NREL","f":"Free w/ key","p":"n/a","b":"US wind resource time-series for 126k+ sites","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Energy Data Initiative (OEDI) / data.openei.org","u":"https://data.openei.org/","co":"Openei","f":"Free, keyless (S3 data lake + portal)","p":"n/a","b":"Bulk DOE/NREL renewable energy open datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenEI Utility Rate Database (URDB) API","u":"https://openei.org/services/doc/rest/util_rates/","co":"Openei","f":"Free, key optional","p":"n/a","b":"US utility electricity rate structures lookup","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Patch API (carbon credits)","u":"https://www.patch.io/","co":"Patch","f":"Free sandbox/dev key","p":"Pay per credit purchased","b":"Carbon credit procurement & offset embedding","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PVGIS (EU JRC Photovoltaic Geographical Information System)","u":"https://joint-research-centre.ec.europa.eu/photovoltaic-geographical-information-system-pvgis/getting-started-pvgis/api-non-interactive-service_en","co":"European Commission","f":"Free, keyless (30 req/sec/IP)","p":"n/a","b":"Global PV output & solar radiation estimates","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"PVWatts (NREL Developer Network)","u":"https://developer.nrel.gov/docs/solar/pvwatts/v8/","co":"NREL","f":"Free w/ key","p":"n/a","b":"US/global grid-tied PV energy production estimates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"renewables.ninja API","u":"https://www.renewables.ninja/documentation/api","co":"Renewables","f":"Free w/ key (CC BY-NC 4.0, non-commercial)","p":"n/a","b":"Hourly PV & wind power output simulation anywhere","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UK Carbon Intensity API (NESO / National Grid ESO)","u":"https://carbonintensity.org.uk/","co":"Carbonintensity","f":"Free, keyless","p":"n/a","b":"GB grid carbon intensity, forecast & regional","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WattTime API","u":"https://docs.watttime.org/","co":"Watttime","f":"Free for CAISO_NORTH (all signals, 2+yr history, forecasts)","p":"WattTime Pro subscription (quote)","b":"Marginal grid emissions (MOER), real-time & forecast","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Researcher & org identifiers","count":25,"entries":[{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key (registered access; rate-limited)","p":"Higher-volume/commercial plans on request","b":"Aggregated open-access papers, authors, repositories","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref Open Funder Registry API","u":"https://www.crossref.org/documentation/funder-registry/funder-data-via-the-api/","co":"Crossref","f":"Free, keyless (api.crossref.org/funders); CSV/RDF dumps","p":"n/a","b":"Funder IDs/DOIs; now transitioning to ROR","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (polite pool with mailto)","p":"Metadata Plus ~paid for SLA/higher limits","b":"Scholarly works, authors, funders, DOI metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless public API (CC0 metadata)","p":"n/a (DOI minting via membership)","b":"DOI metadata, datasets, ROR-funded resource search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOI / Crossref Funder ID resolver (doi.org content negotiation)","u":"https://www.doi.org/factsheets/DOIProxy.html","co":"Doi","f":"Free, keyless resolution & content negotiation","p":"n/a","b":"Resolve DOIs incl. Funder ID DOIs to metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Europe PMC RESTful API","u":"https://europepmc.org/RestfulWebService","co":"Europepmc","f":"Free, keyless","p":"n/a","b":"Life-science literature; ORCID-linked authors, grants, ROR","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GRID (Global Research Identifier Database)","u":"https://www.grid.ac/downloads","co":"Grid","f":"Free CC0 data dumps (JSON/CSV); releases ended Sep 2021","p":"n/a","b":"Legacy org IDs; superseded by ROR (mappings exist)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"IdRef / ABES web services","u":"https://abes.fr/api-et-web-services/","co":"Abes","f":"Free, keyless (idref2id / id2idref, idref2ror crosswalks; SolR search)","p":"n/a","b":"French researcher IDs; crosswalk to ORCID/ISNI/VIAF/ROR","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ISNI SRU Search API","u":"https://isni.org/page/technical-documentation/","co":"Isni","f":"Free public search (assigned records); SRU/RDF/JSON-LD","p":"Membership for assignment/AtomPub API","b":"International standard name IDs for people & orgs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"isni.fm (free ISNI lookup)","u":"https://isni.fm/","co":"Isni","f":"Free, keyless lookup by ISNI or name (no signup)","p":"n/a","b":"Quick ISNI resolve for musicians/creators/publishers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Lens.org Scholar & Patent API","u":"https://docs.api.lens.org/","co":"Lens.org","f":"Free Scholarly API tier (5,000 req/mo, up to 5M records) for academic/non-profit on approval","p":"Custom commercial/partner plans (negotiated)","b":"Linked scholarly works, patents, inventors/researchers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Library of Congress Linked Data (id.loc.gov) Authorities","u":"https://id.loc.gov/","co":"Loc","f":"Free, keyless (LCNAF name authorities, RDF/JSON-LD)","p":"n/a","b":"US name authority IDs; crosswalk to VIAF/ISNI","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"lobid-gnd (GND Authority File) API","u":"https://lobid.org/gnd/api","co":"Lobid","f":"Free, keyless JSON-LD API over German GND","p":"n/a","b":"German national authority IDs for persons/orgs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIH RePORTER API","u":"https://api.reporter.nih.gov/","co":"NIH RePORTER","f":"Free, keyless (V2 project/publication API); ExPORTER bulk","p":"n/a","b":"Funded projects, principal investigators, grant orgs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAIRE Graph API","u":"https://graph.openaire.eu/docs/apis/graph-api/","co":"OpenAIRE","f":"Free, keyless (rate-limited); register/token for higher limits","p":"n/a","b":"Researchers, orgs, projects, funders interlinked graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless (100k req/day); free polite-pool key","p":"Premium plan for higher/dedicated limits","b":"Authors, institutions (ROR-linked), works, funders graph","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ORCID Public API","u":"https://info.orcid.org/documentation/integration-guide/registering-a-public-api-client/","co":"ORCID","f":"Free w/ key (OAuth client ID/secret)","p":"n/a (Member API via paid membership)","b":"Researcher iDs, public profiles, works, affiliations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"PubMed / NCBI E-utilities API","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s); free API key raises to 10 req/s","p":"n/a","b":"Biomedical literature, author names, PMIDs, affiliations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"RAiD (Research Activity Identifier) API","u":"https://www.raid.org/","co":"Raid","f":"Free registry (ISO 23527); API via DataCite/ARDC, requires auth","p":"n/a","b":"Persistent IDs for research projects/activities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ROR (Research Organization Registry) API","u":"https://ror.readme.io/","co":"Readme","f":"Free, keyless (2000 req / 5 min per IP); CC0 data dump","p":"n/a","b":"Persistent IDs for research orgs; affiliation-string matching","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Scholia","u":"https://scholia.toolforge.org/","co":"Toolforge","f":"Free, keyless (built on Wikidata SPARQL)","p":"n/a","b":"On-the-fly scholarly profiles for researchers/orgs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free, keyless (shared limits); free key for higher limits","p":"n/a","b":"Author IDs, papers, citations across 200M+ works","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"VIAF (Virtual International Authority File) API","u":"https://www.oclc.org/developer/api/oclc-apis/viaf.en.html","co":"Oclc","f":"Free, keyless (search & cluster records)","p":"n/a","b":"Clustered name authority IDs linking 30+ agencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Wikidata REST/Action API (wbgetentities)","u":"https://www.wikidata.org/w/api.php","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Fetch entity statements: ORCID, ROR, ISNI, VIAF cross-IDs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Wikidata SPARQL Query Service","u":"https://query.wikidata.org/","co":"Wikimedia","f":"Free, keyless (descriptive User-Agent advised)","p":"n/a","b":"Scholarly graph: ORCID P496, author/org cross-IDs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Retail, CPG & Consumer goods","count":28,"entries":[{"n":"Amazon Creators API (formerly PA-API)","u":"https://affiliate-program.amazon.com/creatorsapi/docs/en-us/introduction","co":"Amazon","f":"Free w/ Associate approval; requires 10 qualified sales/30 days","p":"n/a","b":"Amazon product catalog data for affiliates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Azure Retail Prices API","u":"https://learn.microsoft.com/en-us/rest/api/cost-management/retail-prices/azure-retail-prices","co":"Microsoft","f":"Free, keyless (unauthenticated)","p":"n/a","b":"Cloud-service retail price list (niche reference)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Barcode Lookup API","u":"https://www.barcodelookup.com/api","co":"Barcodelookup","f":"Free test account only","p":"Paid monthly plans","b":"Large UPC/EAN/ISBN catalog with pricing, images","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Barcode Spider","u":"https://www.barcodespider.com/","co":"Barcodespider","f":"Free trial w/ key, limited daily lookups","p":"Paid plans (subscription)","b":"UPC/EAN/ISBN/ASIN product data, JSON/CSV","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Best Buy Developer API","u":"https://developer.bestbuy.com/apis","co":"Bestbuy","f":"Free w/ API key (free signup)","p":"n/a","b":"1M+ electronics products, pricing, availability, stores","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Brocade.io","u":"https://www.brocade.io/","co":"Brocade","f":"Free, keyless read; token for writes","p":"n/a","b":"Open GTIN/barcode product database, free read access","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Buycott UPC/Barcode API","u":"https://www.buycott.com/api","co":"Buycott","f":"Free tier available w/ key","p":"Paid plans (subscription)","b":"600M+ barcode lookup with brand ownership data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Datakick","u":"https://www.datakick.org/","co":"Datakick","f":"Free, keyless read; token for writes","p":"n/a","b":"Open community UPC/GTIN grocery product database","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EAN-Search.org","u":"https://www.ean-search.org/ean-database-api.html","co":"Ean search","f":"Free trial credits w/ key","p":"Paid plans (subscription)","b":"EAN/GTIN/UPC/ISBN lookup with multilingual product names","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"eBay Browse API (Buy)","u":"https://developer.ebay.com/api-docs/buy/browse/overview.html","co":"Ebay","f":"Free w/ key (sandbox open; prod needs approval)","p":"n/a","b":"Marketplace item search by keyword/GTIN/category","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Etsy Open API v3","u":"https://developers.etsy.com/documentation/","co":"Etsy","f":"Free w/ API key (app approval)","p":"n/a","b":"Handmade/vintage marketplace listings, shops, inventory","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Go-UPC","u":"https://go-upc.com/plans/api","co":"Go upc","f":"Free trial key, 150 requests/mo","p":"$19.95/mo (Developer)","b":"Global barcode database, 500M+ products lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Kroger Developer API (Products & Locations)","u":"https://developer.kroger.com/reference/","co":"Kroger","f":"Free public tier w/ OAuth registration","p":"n/a (partner approval for full product data)","b":"Grocery product, pricing, deals, store locations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nutritionix API","u":"https://www.nutritionix.com/business/api","co":"Nutritionix","f":"Free dev tier (limited daily calls)","p":"Enterprise (~$1,850/mo)","b":"Branded/UPC packaged-food & restaurant nutrition","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Beauty Facts API","u":"https://world.openbeautyfacts.org/data","co":"Openbeautyfacts","f":"Free, keyless (read); rate-limited","p":"n/a","b":"Open cosmetics/personal-care product & ingredient data by barcode","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Food Facts API","u":"https://openfoodfacts.github.io/openfoodfacts-server/api/","co":"Openfoodfacts","f":"Free, keyless (read); rate-limited","p":"n/a","b":"Open packaged-food product/UPC data, ingredients, nutrition","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Products Facts API","u":"https://world.openproductsfacts.org/data","co":"Openproductsfacts","f":"Free, keyless (read); rate-limited","p":"n/a","b":"Open general consumer-goods product data by barcode","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PriceAPI","u":"https://www.priceapi.com/","co":"Priceapi","f":"Free trial","p":"Paid plans (subscription)","b":"Price monitoring across Amazon, Google Shopping, eBay","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PricesAPI","u":"https://pricesapi.io/","co":"Pricesapi","f":"Free tier 1,000 calls/mo, no card","p":"Paid plans (subscription)","b":"Real-time multi-retailer price comparison & offers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SerpApi Google Shopping API","u":"https://serpapi.com/google-shopping-api","co":"Serpapi","f":"Free tier 100 searches/mo","p":"$75/mo (entry plan)","b":"Google Shopping product results & price comparison","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Shopify Storefront API","u":"https://shopify.dev/docs/api/storefront/latest","co":"Shopify","f":"Free w/ token (per-store)","p":"n/a","b":"Headless storefront product, variant, inventory data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Square Catalog & Inventory API","u":"https://developer.squareup.com/reference/square/inventory-api","co":"Squareup","f":"Free w/ OAuth token (per-seller)","p":"n/a","b":"Retail catalog items and real-time inventory counts","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Target RedSky API","u":"https://redsky.target.com/","co":"Target","f":"Free, undocumented public endpoints","p":"n/a","b":"Target product details, pricing, store availability","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"U.S. Census Monthly Retail Trade (MARTS/MRTS) API","u":"https://www.census.gov/retail/index.html","co":"U.S. Census Bureau","f":"Free w/ key (Census API)","p":"n/a","b":"Official U.S. retail & food-service sales indicators","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UPCdatabase.org","u":"https://upcdatabase.org/api","co":"Upcdatabase","f":"Free w/ key, token-based, limited","p":"Paid tiers (subscription)","b":"Community UPC/EAN barcode lookup with API token","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UPCitemdb","u":"https://devs.upcitemdb.com/","co":"Upcitemdb","f":"Free EXPLORER plan, 100 requests/day, no signup/key","p":"$99/mo (DEV plan)","b":"UPC/EAN/ASIN barcode-to-product lookup, bulk","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Verified by GS1 / GS1 GTIN Validation API","u":"https://www.gs1.org/services/verified-by-gs1","co":"Gs1","f":"Free web lookup; API via GS1 membership","p":"GS1 membership (region-dependent)","b":"Authoritative GTIN/GLN validation & brand attributes","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Walmart Marketplace / Affiliate API","u":"https://developer.walmart.com/","co":"Walmart","f":"Free for partners/sellers (application required)","p":"n/a","b":"Walmart product catalog, pricing for partners","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Robotics & Industrial automation","count":27,"entries":[{"n":"Adafruit IO","u":"https://io.adafruit.com/api/docs/","co":"Adafruit","f":"Free tier: 30 data pts/min, 5 feeds, HTTP+MQTT","p":"$10/mo (IO+)","b":"Maker IoT device data feeds & dashboards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Azure Industrial IoT (OPC Publisher / OPC UA)","u":"https://azure.github.io/Industrial-IoT/","co":"Azure","f":"Open-source modules free; Azure usage billed","p":"Azure pay-as-you-go","b":"OPC UA to cloud telemetry pipelines","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Boston Dynamics Spot SDK","u":"https://dev.bostondynamics.com/","co":"Bostondynamics","f":"Free open-source SDK (Python/gRPC); robot required","p":"n/a (hardware cost)","b":"Controlling Spot, reading sensors, payload integration","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"docs.ros.org (ROS 2 documentation/API)","u":"https://docs.ros.org/","co":"Ros","f":"Free, keyless docs + generated package APIs","p":"n/a","b":"ROS 2 core/package API reference & tutorials","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Formant Cloud Robotics API","u":"https://docs.formant.io/","co":"Formant","f":"Free tier: single user, unlimited robots/bandwidth; REST/SDK","p":"Paid plans (quote)","b":"Robot fleet telemetry, teleop & observability","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Foxglove (robotics data platform / API)","u":"https://docs.foxglove.dev/","co":"Foxglove","f":"Free-forever plan: 3 users, 10GB, 10 devices; REST API/SDK/webhooks","p":"Paid team plans (quote)","b":"Robotics log/telemetry visualization & data API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Hugging Face Hub API (LeRobot datasets)","u":"https://huggingface.co/docs/hub/api","co":"Hugging Face","f":"Free w/ token; large public robotics dataset hosting/streaming","p":"PRO ~$9/mo","b":"Robot-learning datasets, models, streaming","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Inductive Automation Ignition (Web Dev / OPC UA)","u":"https://docs.inductiveautomation.com/","co":"Inductiveautomation","f":"Free trial (unlimited time, reset every 2h)","p":"Paid license (quote)","b":"SCADA/HMI OPC UA server + web APIs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"InOrbit RobOps API","u":"https://developer.inorbit.ai/docs","co":"Inorbit","f":"Free tier (limited robots); REST + streaming, API key","p":"Paid plans (quote)","b":"Robot ops data, actions & ROS topic mapping","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Isaac Lab / Isaac Sim (NVIDIA)","u":"https://developer.nvidia.com/isaac/sim","co":"Nvidia","f":"Free SDK/sim (open-source Isaac Lab); GPU needed","p":"n/a (hardware/cloud costs)","b":"GPU robot simulation & RL environment API","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"KITTI Vision Benchmark Suite","u":"https://www.cvlibs.net/datasets/kitti/","co":"Cvlibs","f":"Free download w/ registration; non-commercial","p":"n/a","b":"LiDAR/stereo robot perception & odometry benchmark","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"MTConnect (agent REST API + standard)","u":"https://www.mtconnect.org/","co":"Mtconnect","f":"Free, open/royalty-free; XML-over-HTTP read-only API","p":"n/a","b":"Reading CNC/machine-tool shopfloor data over REST","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Nexar API (Octopart electronic components)","u":"https://nexar.com/api","co":"Nexar","f":"Free: lifetime 100-parts eval + 1000 parts/mo supply plan (GraphQL)","p":"Paid query plans (quote)","b":"Component sourcing, stock, pricing for robotics BOMs","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"nuScenes dataset (Motional)","u":"https://www.nuscenes.org/","co":"Nuscenes","f":"Free w/ account; non-commercial download + devkit","p":"n/a","b":"Autonomous-driving multimodal sensor robot data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Automation Software (OAS) REST API","u":"https://openautomationsoftware.com/products/developer-tools-apis/rest-api/","co":"Openautomationsoftware","f":"Free trial; REST over OPC/Modbus tags","p":"Paid license (quote)","b":"PLC/SCADA tag data over REST/MQTT","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open X-Embodiment (DeepMind)","u":"https://robotics-transformer-x.github.io/","co":"Robotics transformer x","f":"Free, keyless via TFDS / Google Cloud Storage","p":"n/a","b":"1M+ real robot trajectories, 22 embodiments","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"open62541 (OPC UA open-source stack)","u":"https://www.open62541.org/","co":"Open62541","f":"Free, open-source (MPLv2) OPC UA client/server SDK","p":"n/a","b":"Embedding OPC UA industrial comms in C/C++ apps","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Particle.io Device Cloud API","u":"https://docs.particle.io/reference/cloud-apis/api/","co":"Particle","f":"Free for prototyping (limited devices)","p":"~$2.99/device/mo","b":"Cellular/edge IoT device control & data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ROBOTIS DYNAMIXEL SDK","u":"https://emanual.robotis.com/docs/en/software/dynamixel/dynamixel_sdk/overview/","co":"Robotis","f":"Free, open-source SDK (C/Python/Java...)","p":"n/a","b":"Controlling Dynamixel servos / robot actuators","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ROS Index (index.ros.org)","u":"https://index.ros.org/","co":"Ros","f":"Free, keyless (web index + package metadata)","p":"n/a","b":"Searching ROS/ROS 2 packages, repos, dependencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"rosbridge (rosbridge_suite)","u":"https://github.com/RobotWebTools/rosbridge_suite","co":"RobotWebTools","f":"Free, open-source; JSON/WebSocket API to ROS","p":"n/a","b":"Web/non-ROS apps talking to ROS topics/services","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"roslibjs (RobotWebTools)","u":"https://github.com/RobotWebTools/roslibjs","co":"RobotWebTools","f":"Free, open-source JS client library for rosbridge","p":"n/a","b":"Browser/Node.js apps controlling ROS via WebSocket","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Siemens Insights Hub / MindSphere API","u":"https://developer.siemens.com/insights-hub/docs/apis/index.html","co":"Siemens","f":"Start-for-Free dev tenant; IoT TimeSeries REST APIs","p":"Subscription (quote)","b":"Industrial asset & time-series IIoT data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ThingsBoard","u":"https://thingsboard.io/docs/reference/rest-api/","co":"Thingsboard","f":"Free, open-source self-host; REST/MQTT/CoAP","p":"Cloud from ~$10/mo","b":"Open-source IIoT device mgmt & telemetry","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ThingSpeak (MathWorks) IoT API","u":"https://www.mathworks.com/help/thingspeak/","co":"Mathworks","f":"Free tier: ~3M msgs/yr, REST + MQTT","p":"~$95/yr (Standard)","b":"Sensor/industrial telemetry ingest & analytics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Universal Robots API (UR Cloud)","u":"https://remote.universal-robots.com/","co":"Universal robots","f":"Free dev portal; sign up for API keys","p":"n/a","b":"Cobot fleet/remote management integration","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wandelbots NOVA API","u":"https://docs.wandelbots.io/","co":"Wandelbots","f":"Free SDKs (Python/TS); platform eval, token auth","p":"Subscription (quote)","b":"Robot-agnostic motion/control over REST/SDK","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Scholarly books & metadata","count":27,"entries":[{"n":"arXiv API","u":"https://info.arxiv.org/help/api/index.html","co":"arXiv","f":"Free, keyless (Atom/OAI-PMH over 2M+ preprints)","p":"n/a","b":"Preprint metadata and full-text PDFs by subject","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BASE (Bielefeld Academic Search Engine) API","u":"https://www.base-search.net/about/en/about_develop.php","co":"Base search","f":"Free for non-commercial; IP whitelisting/key by application","p":"n/a","b":"OA scholarly docs, theses, repository records","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key (immediate registration); largest OA aggregator","p":"n/a","b":"300M+ OA research papers metadata and full text","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://www.crossref.org/documentation/retrieve-metadata/rest-api/","co":"Crossref","f":"Free, keyless (DOI metadata for books, chapters)","p":"Metadata Plus subscription for SLA/snapshots","b":"DOI metadata for books, chapters, references","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless public read (CC0 metadata, OAI-PMH)","p":"Membership for minting DOIs","b":"DOI metadata for books, datasets, software","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOAB (Directory of Open Access Books) REST/OAI API","u":"https://www.doabooks.org/en/article/api-search-doab","co":"Doabooks","f":"Free, keyless (DSpace REST + OAI-PMH; CC0 metadata)","p":"n/a","b":"Peer-reviewed open access academic books","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DOAJ API","u":"https://doaj.org/api/v4/docs","co":"DOAJ","f":"Free, keyless search; key only for authenticated ops","p":"n/a","b":"Open access journal and article metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Google Books API","u":"https://developers.google.com/books","co":"Google","f":"Free w/ key, 1k requests/day default","p":"n/a","b":"Mainstream book search, previews, volume metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Gutendex (Project Gutenberg)","u":"https://gutendex.com/","co":"Gutendex","f":"Free, keyless JSON API over Gutenberg catalog","p":"n/a","b":"Public-domain ebook metadata and download links","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HathiTrust Bibliographic API","u":"https://www.hathitrust.org/member-libraries/resources-for-librarians/data-resources/bibliographic-api/","co":"Hathitrust","f":"Free, keyless (bib/rights lookup by ISBN/OCLC/LCCN)","p":"n/a","b":"HathiTrust volume rights and bibliographic records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Internet Archive Metadata API","u":"https://archive.org/developers/metadata.html","co":"Archive","f":"Free, keyless (item metadata read; write needs S3 keys)","p":"n/a","b":"Digitized books, fulltext, archival item metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Internet Archive Scholar / Fatcat API","u":"https://fatcat.wiki/","co":"Fatcat","f":"Free, keyless read; CC0 metadata, bulk dumps","p":"n/a","b":"At-risk scholarly outputs, open catalog of works","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ISBNdb API","u":"https://isbndb.com/isbn-database","co":"Isbndb","f":"7-day trial only","p":"$14.99/mo (Basic plan)","b":"Commercial ISBN lookup, 19 data points/book","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Library of Congress SRU API","u":"https://www.loc.gov/apis/additional-apis/search-retrieval-via-url/","co":"Loc","f":"Free, keyless (SRU/CQL; MARCXML/MODS/Dublin Core)","p":"n/a","b":"Authoritative LC catalog and authority records","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OAPEN Library REST/OAI API","u":"https://www.oapen.org/resources/15635975-metadata","co":"Oapen","f":"Free, keyless (REST + OAI; ONIX/MARCXML/JSON feeds)","p":"n/a","b":"Open access scholarly book full text + metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Book Publishers Metadata (Thoth)","u":"https://www.openbookpublishers.com/open-software/open-metadata","co":"Openbookpublishers","f":"Free, keyless open metadata (Thoth GraphQL / OAI feeds, CC0)","p":"n/a","b":"Open access monograph metadata and full text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Library API","u":"https://openlibrary.org/developers/api","co":"Openlibrary","f":"Free, keyless (JSON, covers, ISBN lookup, bulk dumps)","p":"n/a","b":"Open book catalog, ISBN/cover lookup, editions","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAlex API","u":"https://docs.openalex.org/","co":"OpenAlex","f":"Free, keyless (250M+ works; email for polite pool)","p":"Premium plan for high-volume SLA","b":"Scholarly works incl. books, citations, authors","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenCitations API","u":"https://api.opencitations.net/","co":"Opencitations","f":"Free, keyless (Index + Meta; CC0; 180 req/min)","p":"n/a","b":"Open citation links and bibliographic metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ORCID Public API","u":"https://info.orcid.org/documentation/features/public-api/","co":"ORCID","f":"Free w/ registered client credentials (public records)","p":"Member API via institutional membership","b":"Researcher identifiers and linked work records","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"PubMed E-utilities (NCBI)","u":"https://www.ncbi.nlm.nih.gov/books/NBK25501/","co":"NCBI (NIH)","f":"Free, keyless (3 req/s; 10/s with free API key)","p":"n/a","b":"Biomedical literature search and citation metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Semantic Scholar Academic Graph API","u":"https://www.semanticscholar.org/product/api","co":"Semantic Scholar","f":"Free keyless (rate-limited); free key for higher limits","p":"n/a","b":"Papers/books metadata, citations, AI summaries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Springer Nature APIs","u":"https://dev.springernature.com/","co":"Springernature","f":"Free w/ key (Open Access + Metadata, non-commercial)","p":"Commercial licensing via Data Solutions","b":"Springer book chapters and OA full text","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Unpaywall API","u":"https://unpaywall.org/products/api","co":"Unpaywall","f":"Free, keyless (email param); 100k calls/day","p":"Data feed/snapshot subscription for bulk","b":"Finding open-access full text by DOI","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HathiTrust Data API","u":"https://old.www.hathitrust.org/data_api.html","co":"Hathitrust","f":"none (OAuth keyset issued to members)","p":"Member access only","b":"Page images, OCR text, METS for HT volumes","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"WorldCat Metadata API (OCLC)","u":"https://www.oclc.org/developer/api/oclc-apis/worldcat-metadata-api.en.html","co":"Oclc","f":"none (OCLC cataloging subscription)","p":"Via OCLC subscription","b":"Read/write WorldCat bib and holdings records","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"WorldCat Search API v2 (OCLC)","u":"https://www.oclc.org/developer/api/oclc-apis/worldcat-search-api.en.html","co":"Oclc","f":"none (institutional/WorldCat subscription required)","p":"Via OCLC institutional subscription","b":"Global library holdings and bibliographic search","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Semiconductors & Electronics","count":26,"entries":[{"n":"AllDatasheet.com","u":"https://www.alldatasheet.com/","co":"Alldatasheet","f":"Free datasheet search (no official public API)","p":"n/a","b":"Semiconductor/IC datasheet lookup by part number","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Datasheet Archive","u":"https://www.datasheetarchive.com/","co":"Datasheetarchive","f":"Free datasheet/CAD search (largest free archive)","p":"n/a","b":"Free electronic component datasheets and app notes","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DataSheets.com","u":"https://www.datasheets.com/","co":"Datasheets","f":"Free parametric component search and datasheet database","p":"n/a","b":"Free parametric IC/component search, datasheets, distributors","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Digi-Key API (DK API Solutions)","u":"https://developer.digikey.com/","co":"Digikey","f":"Free w/ key, OAuth2; sandbox available","p":"n/a","b":"Product search, pricing, availability, ordering automation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"element14 / Farnell / Newark Product Search API","u":"https://partner.element14.com/","co":"Element14","f":"Free w/ key (partner registration)","p":"n/a","b":"Avnet-group parts, real-time stock and pricing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Findchips","u":"https://www.findchips.com/","co":"Findchips","f":"Free web search engine; no public developer API","p":"n/a","b":"Distributor price/stock aggregation, trends, BOM (web only)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"JLCPCB Components / Parts API","u":"https://api.jlcpcb.com/","co":"Jlcpcb","f":"Free official API (application/approval required); community JSON endpoints exist","p":"n/a","b":"SMT/assembly parts catalog, stock, parametric data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"LCSC Open API","u":"https://www.lcsc.com/api-platform","co":"Lcsc","f":"Free w/ approved account; product search, stock, pricing","p":"n/a","b":"LCSC component catalog, real-time stock and pricing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mouser Electronics Search API","u":"https://www.mouser.com/api-hub/","co":"Mouser","f":"Free w/ key (registered Mouser account)","p":"n/a","b":"Component search, real-time price/stock, datasheets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nexar API (Octopart data)","u":"https://nexar.com/api","co":"Nexar","f":"Free Welcome/Eval plan (limited monthly calls / matched parts)","p":"Custom paid tiers (quote-based)","b":"GraphQL aggregated part search, pricing, CAD, datasheets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OEMsecrets API","u":"https://www.oemsecrets.com/api","co":"Oemsecrets","f":"Free w/ access request; tens of millions of parts, 100+ distributors","p":"n/a","b":"Cross-distributor price/stock comparison, datasheets, BOM","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Partstack","u":"https://partstack.com/data-solutions","co":"Partstack","f":"Free web search; API via request form","p":"Quote-based data solutions","b":"1.8B+ part catalog, distributor pricing, alternates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"RS Components / RS Online Tactical API","u":"https://us.rs-online.com/","co":"Rs online","f":"Free w/ App ID (request via RS / sales rep)","p":"n/a","b":"Multi-supplier product data, stock, pricing dashboards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SamacSys Component Search Engine (Supplyframe)","u":"https://componentsearchengine.com/","co":"Componentsearchengine","f":"Free account; all symbol/footprint/3D downloads free","p":"n/a","b":"Free ECAD models for 20+ CAD tools, datasheets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SIA Semiconductor Market Data","u":"https://www.semiconductors.org/data-resources/market-data/","co":"Semiconductors","f":"Free unit-sales dashboard and factbook","p":"Institutional license (multi-user)","b":"US/global chip sales trends, industry factbook","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"SnapMagic Search (SnapEDA) API","u":"https://www.snapeda.com/get-api/","co":"Snapeda","f":"Free tier available; Premium paid (email for access)","p":"Premium (quote-based)","b":"Schematic symbols, PCB footprints, 3D CAD models via HTTP","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sourcengine API (Sourceability)","u":"https://dev.sourcengine.com/","co":"Sourcengine","f":"Free w/ access request (B2B marketplace data); OpenAPI + llms.txt","p":"n/a","b":"Multi-supplier marketplace search, quote, order API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Texas Instruments API Portal (Store + Product Data)","u":"https://api-portal.ti.com/","co":"Ti","f":"Free w/ key (myTI approval); parametric, inventory/pricing, cross-ref","p":"n/a","b":"Direct TI inventory, pricing, cross-reference, ordering","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TrustedParts.com Inventory API","u":"https://www.trustedparts.com/docs/api/trustedparts-api/","co":"Trustedparts","f":"Free w/ key; up to 50 parts/request, JSON or XML","p":"n/a","b":"Authorized real-time stock, pricing, lifecycle risk, lead times","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ultra Librarian","u":"https://www.ultralibrarian.com/","co":"Ultralibrarian","f":"Free CAD library; millions of symbols/footprints/3D models","p":"n/a","b":"Verified ECAD models in 30+ formats, datasheets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"WikiChip","u":"https://en.wikichip.org/","co":"Wikichip","f":"Free wiki; MediaWiki API for chip/microarchitecture data","p":"n/a","b":"Processor microarchitecture, fab process, chip specs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WSTS (World Semiconductor Trade Statistics)","u":"https://www.wsts.org/","co":"Wsts","f":"Free Blue Book / historical billings Excel downloads, no login","p":"Subscription for full granular reports","b":"Global semiconductor billings, units, ASP by region","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"X-Refs Cross-Reference Search","u":"https://www.x-refs.com/","co":"X refs","f":"Free web tool (open beta); batch/ERP API access offered","p":"Quote-based","b":"AI electronic component cross-reference / alternates","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Accuris (IHS) Parts API","u":"https://accuristech.com/solutions/parts-api-integration/","co":"Accuristech","f":"none (commercial)","p":"Quote-based","b":"Parts lifecycle, PCN/EOL, compliance to PLM/ERP","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"SEMI World Fab Forecast","u":"https://www.semi.org/en/products-services/market-data/fab-forecast","co":"Semi","f":"none (subscription)","p":"Subscription (quote-based)","b":"Global fab capacity, equipment spend forecasts","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"SiliconExpert API","u":"https://www.siliconexpert.com/","co":"Siliconexpert","f":"none (commercial)","p":"Quote-based","b":"Parts lifecycle, EOL, compliance, cross-reference data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Sociology & Demography","count":24,"entries":[{"n":"CDC NCHS via data.cdc.gov (Socrata SODA API)","u":"https://data.cdc.gov/","co":"U.S. CDC","f":"Free, keyless (app token raises limits)","p":"n/a","b":"US vital/health statistics datasets, demographic breakdowns","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CDC WONDER API (natality, mortality, population)","u":"https://wonder.cdc.gov/wonder/help/wonder-api.html","co":"U.S. CDC","f":"Free, keyless (XML POST)","p":"n/a","b":"US births/deaths summary stats by demographics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Census Microdata API (PUMS / CPS microdata)","u":"https://www.census.gov/data/developers/data-sets/census-microdata-api.html","co":"U.S. Census Bureau","f":"Free w/ Census key (free)","p":"n/a","b":"Individual-record public-use microdata (PUMS, CPS)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"DHS Program API (Demographic and Health Surveys)","u":"https://api.dhsprogram.com/","co":"Dhsprogram","f":"Free; key (free) needed for higher limits/full access","p":"n/a","b":"Population/health/fertility indicators across 90+ countries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Eurostat Statistics API (population & demography)","u":"https://ec.europa.eu/eurostat/web/user-guides/data-browser/api-data-access/api-getting-started/api","co":"European Commission","f":"Free, keyless (JSON-stat)","p":"n/a","b":"European population, vital events, regional demography","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GESIS Search (search.gesis.org) — social science data catalogue","u":"https://search.gesis.org/","co":"Gesis","f":"Free, keyless web search; download w/ registration","p":"n/a","b":"ISSP, EVS, Eurobarometer, CSES study + variable search","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GSS Data Explorer (NORC General Social Survey)","u":"https://gssdataexplorer.norc.org/","co":"Norc","f":"Free w/ account; custom extracts download (no REST API)","p":"n/a","b":"US attitudes/social trends survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"IHME Global Burden of Disease / GHDx API","u":"https://ghdx.healthdata.org/","co":"Healthdata","f":"Free; GBD Results Tool + data catalog (registration for some)","p":"n/a","b":"Mortality, morbidity, demographic burden by age/sex/geo","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ILOSTAT SDMX API (labour & social statistics)","u":"https://ilostat.ilo.org/resources/sdmx-tools/","co":"Ilo","f":"Free, keyless (SDMX + bulk download)","p":"n/a","b":"Employment, wages, working-time, labour demographics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IOM Global Migration Data Portal API","u":"https://www.migrationdataportal.org/handbooks/global-migration-data-portal-api-documentation","co":"Migrationdataportal","f":"Free w/ API key (header api-key)","p":"n/a","b":"International migration, remittances, displacement indicators","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IPUMS API (USA, CPS, International, NHGIS extracts)","u":"https://developer.ipums.org/","co":"Ipums","f":"Free w/ account API key","p":"n/a","b":"Harmonized census/survey microdata extracts globally","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OECD Data Explorer / SDMX API","u":"https://www.oecd.org/en/data/insights/data-explainers/2024/09/api.html","co":"OECD","f":"Free, keyless (SDMX)","p":"n/a","b":"Comparative social spending, family, inequality indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Our World in Data Chart/Catalog API","u":"https://docs.owid.io/projects/etl/api/chart-api/","co":"Owid","f":"Free, keyless (CSV/JSON)","p":"n/a","b":"Curated population, urbanization, social-change datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Pew Research Center Datasets","u":"https://www.pewresearch.org/datasets/","co":"Pewresearch","f":"Free w/ account download (no public API)","p":"n/a","b":"US/global public-opinion survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"U.S. Census Bureau Data API (ACS, Decennial, PEP)","u":"https://www.census.gov/data/developers/data-sets.html","co":"U.S. Census Bureau","f":"Free w/ key (free; soft 500/day keyless)","p":"n/a","b":"US demographics, ACS/decennial/population estimates","s":"In use","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"UN DESA Population Division Data Portal API (WPP)","u":"https://population.un.org/dataportalapi/index.html","co":"United Nations","f":"Free, keyless REST (CSV/JSON)","p":"n/a","b":"Global population, fertility, mortality, migration projections","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UN SDG Indicators Database API (unstats)","u":"https://unstats.un.org/sdgs/dataportal/database","co":"United Nations","f":"Free, keyless (SDMX + REST)","p":"n/a","b":"Global SDG social/economic indicators by country","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UN SDG Metadata API (machine-readable indicator metadata)","u":"https://unstats.un.org/SDGMetadataAPI/swagger/index.html","co":"United Nations","f":"Free, keyless (OpenAPI)","p":"n/a","b":"SDG indicator definitions and metadata lookups","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UNdata API (UN Common Database, SDMX/SOAP)","u":"http://data.un.org/Host.aspx?Content=API","co":"United Nations","f":"Free, keyless (SDMX REST/SOAP)","p":"n/a","b":"Cross-UN population, migration, gender, social themes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UNESCO UIS Data API (education, science, culture)","u":"https://databrowser.uis.unesco.org/resources","co":"Unesco","f":"Free, keyless (100k records/request)","p":"n/a","b":"Comparable education/literacy/SDG4 demographic indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UNFPA Population Data Portal","u":"https://pdp.unfpa.org/","co":"Unfpa","f":"Free, keyless dashboards/data","p":"n/a","b":"Reproductive health, gender, population indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UNHCR Refugee Data Finder API","u":"https://api.unhcr.org/docs/refugee-statistics.html","co":"Unhcr","f":"Free, keyless REST/JSON","p":"n/a","b":"Refugee, asylum, IDP and displacement statistics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"World Bank Gender Data Portal / Indicators API","u":"https://genderdata.worldbank.org/en/about","co":"World Bank","f":"Free, keyless","p":"n/a","b":"Sex-disaggregated gender and demographic indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Values Survey (data download / online analysis)","u":"https://www.worldvaluessurvey.org/WVSContents.jsp?CMSID=Documentation","co":"Worldvaluessurvey","f":"Free download w/ registration (no public REST API)","p":"n/a","b":"Global values, beliefs, attitudes survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"}]},{"category":"Sports statistics & live scores","count":25,"entries":[{"n":"API-Football (via RapidAPI)","u":"https://rapidapi.com/api-sports/api/api-football","co":"Rapidapi","f":"Free w/ key, 100 req/day via RapidAPI (10 leagues, no live data)","p":"~$25/mo Pro","b":"Soccer fixtures, live scores, events, predictions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"API-SPORTS (API-FOOTBALL etc., direct)","u":"https://api-sports.io/","co":"Api sports","f":"Free w/ key, 100 req/day per API, forever; no card","p":"~$19/mo (Pro)","b":"Deep multi-sport leagues (football, NBA, NFL, F1, MMA...), live odds, lineups","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"balldontlie","u":"https://www.balldontlie.io/","co":"Balldontlie","f":"Free w/ key, basic endpoints, 5 req/min (NBA/NFL/MLB/EPL)","p":"$9.99/mo ALL-STAR (60 req/min); $39.99/mo paid_plus (600 req/min)","b":"Multi-sport (20+ leagues) stats and box scores","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CollegeFootballData.com","u":"https://collegefootballdata.com/","co":"Collegefootballdata","f":"Free w/ key (Bearer token), real data not sandbox","p":"Optional Patreon tiers for higher limits","b":"NCAA college football stats, betting lines, advanced metrics","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CricAPI / Cricket Data","u":"https://www.cricapi.com/","co":"Cricapi","f":"Free w/ key, 100 hits/day","p":"~$5.99/mo","b":"Cricket live scores, scorecards, schedules, fantasy","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ESPN hidden API","u":"https://github.com/pseudo-r/Public-ESPN-API","co":"Espn","f":"Free, keyless (undocumented public endpoints)","p":"n/a","b":"Cross-sport scoreboards, news, teams, rosters","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Football API by isportsAPI","u":"https://www.isportsapi.com/","co":"Isportsapi","f":"Free trial tier","p":"Paid plans (quote, modular Stats/Live/Odds products)","b":"Soccer & basketball live data and odds (2000+ leagues)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"football-data.org","u":"https://www.football-data.org/","co":"Football data","f":"Free w/ key, 10 req/min, 12 top competitions (delayed scores)","p":"Add-on based: livescores ~€12/mo, statistics/odds ~€15/mo each","b":"European soccer fixtures, standings, scorers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Highlightly","u":"https://highlightly.net/","co":"Highlightly","f":"Free Basic, 100 req/day, no card (multi-sport)","p":"Paid plans for higher volume (quote)","b":"Football/NFL/NBA scores, highlights, stats, odds across 950+ leagues","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Jolpica-F1 (Ergast successor)","u":"https://github.com/jolpica/jolpica-f1","co":"Jolpica","f":"Free, keyless; 200 req/hr unauthenticated","p":"n/a","b":"Formula 1 results, schedules, drivers, standings","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Live-Score API (livescore-api.com)","u":"https://live-score-api.com/","co":"Live score api","f":"Free 14-day trial; up to 2000 req/hr","p":"Standard/Advanced paid plans (quote)","b":"Real-time soccer live scores and fixtures (400+ competitions)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MLB Stats API","u":"https://statsapi.mlb.com/","co":"Mlb","f":"Free, keyless (public undocumented endpoints)","p":"n/a","b":"Official MLB live scores, box scores, player stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MySportsFeeds","u":"https://www.mysportsfeeds.com/","co":"Mysportsfeeds","f":"Free for non-commercial (students/hobbyists); 14-day trial","p":"Commercial plans (quote, ~$25+/mo)","b":"NFL/MLB/NBA/NHL feeds, XML/JSON/CSV","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NBA Stats (stats.nba.com)","u":"https://stats.nba.com/","co":"Nba","f":"Free, keyless (undocumented; needs browser-like headers)","p":"n/a","b":"Advanced official NBA player/team analytics","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"nflverse-data","u":"https://github.com/nflverse/nflverse-data","co":"Nflverse","f":"Free, keyless (open data releases, CSV/parquet)","p":"n/a","b":"Historical NFL play-by-play and player stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NHL API (api-web.nhle.com)","u":"https://github.com/Zmalski/NHL-API-Reference","co":"Nhle","f":"Free, keyless (public v1 endpoints)","p":"n/a","b":"NHL scores, schedule, standings, player stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenLigaDB","u":"https://www.openligadb.de/","co":"Openligadb","f":"Free, keyless, community-maintained","p":"n/a","b":"German Bundesliga & other league results/matchdays","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SportDB.dev","u":"https://sportdb.dev/","co":"Sportdb","f":"Free w/ key, 1000 requests; REST API + MCP server","p":"Paid plans for higher volume (quote)","b":"Football/basketball/tennis scores, standings, transfers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sportmonks","u":"https://www.sportmonks.com/football-api/free-plan/","co":"Sportmonks","f":"Free plan (Danish Superliga + Scottish Premiership), no expiry","p":"~€29/mo Starter (5 leagues)","b":"Soccer fixtures, live scores, stats, lineups, standings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Sportradar","u":"https://developer.sportradar.com/","co":"Sportradar","f":"Free 30-day trial keys (sandbox, real data)","p":"Enterprise (quote)","b":"Premium official live data across 80+ sports","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SportsDataIO","u":"https://sportsdata.io/","co":"Sportsdata","f":"Free trial (never expires; scrambled but realistic data)","p":"Paid plans (quote)","b":"NFL/NBA/MLB/NHL fantasy & betting-grade data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tank01 (RapidAPI sports)","u":"https://rapidapi.com/tank01/api/tank01-fantasy-stats","co":"Rapidapi","f":"Free Basic, 1000 hits/mo, no credit card","p":"$10/mo Pro (1000 req/day per league)","b":"NFL/NBA/MLB/NHL/WNBA stats, fantasy projections","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"The Odds API","u":"https://the-odds-api.com/","co":"The odds api","f":"Free w/ key, 500 credits/mo (credits, not flat requests)","p":"~$30/mo","b":"Scores plus betting odds across sports","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TheSportsDB","u":"https://www.thesportsdb.com/free_sports_api","co":"Thesportsdb","f":"Free w/ test key '123' (~30 req/min); higher tier on Patreon","p":"~$9/mo Patreon (private key, V2 livescores, 120 req/min)","b":"Multi-sport teams, events, scores, artwork, schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wikidata/Wikipedia (already cataloged)","u":"https://www.wikipedia.org/","co":"Wikimedia","f":"Free, keyless","p":"n/a","b":"Athlete/team reference data (context only)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Standards & specifications","count":25,"entries":[{"n":"APIs.guru OpenAPI Directory","u":"https://apis.guru/","co":"Apis","f":"Free, keyless (machine-readable OpenAPI definitions via REST/list.json)","p":"n/a","b":"Directory of public APIs as OpenAPI/Swagger specs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"AsyncAPI spec & schemas","u":"https://github.com/asyncapi/spec","co":"Asyncapi","f":"Free, keyless (spec docs + JSON Schema definitions)","p":"n/a","b":"Event-driven API specification and its machine-readable schemas","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"BIPM / Open Metrology (SI units & metadata)","u":"https://si-digital-framework.org/","co":"Si digital framework","f":"Free, keyless (SI Reference Point: units, constants as machine-readable RDF/JSON-LD)","p":"n/a","b":"Digital SI units, constants, and metrology vocabularies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DataCite REST API (DOI metadata for datasets/standards)","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless (read-only DOI metadata search in JSON:API)","p":"Membership for minting DOIs","b":"DOI metadata for research outputs, datasets, some standards","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DOI Content Negotiation (doi.org / Crossref transform)","u":"https://citation.doi.org/docs.html","co":"Doi","f":"Free, keyless (metadata via Accept header: BibTeX, RIS, RDF, JSON)","p":"n/a","b":"Resolving DOIs (incl. standards) to formatted citation metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ECMA International / TC39 (ECMAScript specs on GitHub)","u":"https://github.com/tc39/ecma262","co":"Tc39","f":"Free, keyless (specs, proposals, test262 via GitHub raw/API)","p":"n/a","b":"ECMAScript and ECMA standard documents and proposal status","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IANA Language Subtag Registry (BCP 47)","u":"https://www.iana.org/assignments/language-subtag-registry/","co":"Iana","f":"Free, keyless (canonical registry file of language/region/script subtags)","p":"n/a","b":"Authoritative BCP 47 language tags for i18n","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IANA Protocol Registries","u":"https://www.iana.org/protocols","co":"Iana","f":"Free, keyless (CSV/XML/JSON per registry: ports, media types, etc.)","p":"n/a","b":"Authoritative protocol parameter, port, media-type registries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"IEEE Xplore Metadata API","u":"https://developer.ieee.org/","co":"IEEE","f":"Free w/ key (registration required; rate-limited metadata access)","p":"Contact / institutional licensing","b":"Metadata for IEEE journals, conferences, and standards","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IETF BibXML Service (bib.ietf.org)","u":"https://bib.ietf.org/","co":"IETF","f":"Free, keyless (JSON/XML/Relaton search across RFC, I-D, W3C, 3GPP, IEEE, IANA, NIST)","p":"n/a","b":"Cross-SDO bibliographic citations for standards documents","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"IETF Datatracker API","u":"https://datatracker.ietf.org/api/","co":"IETF","f":"Free, keyless","p":"n/a","b":"RFCs, Internet-Drafts, working groups, document state in JSON/XML","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"ISO Online Browsing Platform (OBP)","u":"https://www.iso.org/obp/ui/","co":"ISO","f":"Free, keyless web platform (terms, abbreviations, codes; OBP-access tooling on GitHub)","p":"n/a","b":"ISO terms/definitions, country/currency codes, standard previews","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ISO Open Data","u":"https://www.iso.org/open-data.html","co":"ISO","f":"Free, keyless (deliverables, technical committees, ICS classifications in CSV/JSONLines/Parquet)","p":"n/a","b":"ISO standards catalogue metadata and committee structure","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"JSON Schema (official metaschemas)","u":"https://json-schema.org/specification","co":"Schema.org","f":"Free, keyless (dialect metaschemas + vocabularies as hosted JSON)","p":"n/a","b":"Canonical JSON Schema dialect metaschemas and vocab docs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"JSON Schema Store (SchemaStore.org)","u":"https://www.schemastore.org/","co":"Schemastore","f":"Free, keyless (catalog.json + hundreds of JSON schemas)","p":"n/a","b":"Registry of JSON schemas for config/file formats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NIST CPRT (Cybersecurity & Privacy Reference Tool)","u":"https://csrc.nist.gov/projects/cprt","co":"NIST","f":"Free, keyless (NIST framework/control reference data, common JSON schema; XLSX/CSV)","p":"n/a","b":"NIST CSF, 800-53, 800-171 controls and crosswalks in JSON","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NIST NVD Vulnerability APIs (SCAP/CPE/CVE)","u":"https://nvd.nist.gov/developers/vulnerabilities","co":"NIST","f":"Free, keyless (low rate); free key raises limits","p":"n/a","b":"Standards-based vulnerability data (CVE/CPE/CVSS, SCAP)","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAPI Initiative spec (GitHub)","u":"https://github.com/OAI/OpenAPI-Specification","co":"OAI","f":"Free, keyless (OpenAPI spec text + JSON Schema of the spec)","p":"n/a","b":"The OpenAPI specification document and its JSON Schemas","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RFC Editor (rfc-editor.org index/search)","u":"https://www.rfc-editor.org/retrieve/","co":"IETF","f":"Free, keyless (rfc-index.xml, per-RFC TXT/HTML/XML/JSON, BibXML refs)","p":"n/a","b":"Canonical published RFC text, metadata, bibliographic references","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"schema.org vocabulary","u":"https://schema.org/docs/developers.html","co":"Schema.org","f":"Free, keyless (full vocab as JSON-LD, RDF, OWL, CSV; jsonldcontext.json)","p":"n/a","b":"Structured-data type/property vocabulary for the web","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"SPDX License List Data","u":"https://github.com/spdx/license-list-data","co":"Spdx","f":"Free, keyless (per-license JSON at spdx.org/licenses/[id].json; full list JSON)","p":"n/a","b":"Standardized open-source license identifiers and texts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Unicode CLDR JSON (cldr-json)","u":"https://github.com/unicode-org/cldr-json","co":"Unicode org","f":"Free, keyless (locale data as JSON via GitHub/npm packages)","p":"n/a","b":"Internationalization locale data: dates, numbers, names","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"W3C API (api.w3.org)","u":"https://w3c.github.io/w3c-api/","co":"W3C","f":"Free, keyless (read-only JSON: specs, groups, drafts, events)","p":"n/a","b":"W3C technical reports, specs, working groups metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"W3C Technical Reports (TR) index","u":"https://www.w3.org/TR/","co":"W3C","f":"Free, keyless (TR list, filterable; also tr.rdf machine-readable feed)","p":"n/a","b":"Browsing/listing all W3C standards and notes","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WHATWG specifications (web standards)","u":"https://spec.whatwg.org/","co":"Whatwg","f":"Free, keyless (living standards: HTML, DOM, URL, Fetch via GitHub raw)","p":"n/a","b":"Living web platform standards documents and IDL","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Survey microdata & social science archives","count":26,"entries":[{"n":"Afrobarometer (Online Data Analysis + downloads)","u":"https://www.afrobarometer.org/data/","co":"Afrobarometer","f":"Free, no key; merged & round datasets (SPSS/Excel) plus a free online data analysis tool","p":"n/a","b":"African public attitudes survey microdata across rounds","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ANES (American National Election Studies) Data Center","u":"https://electionstudies.org/data-center/","co":"Electionstudies","f":"Free; all data online (some after free registration); Time Series Cumulative File 1948-2024","p":"n/a","b":"US election/voter survey microdata and cumulative time series","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ARDA (Association of Religion Data Archives)","u":"https://www.thearda.com/","co":"Thearda","f":"Free; 1,000+ data collections downloadable free; MARC metadata files; metadata API in development","p":"n/a","b":"US/international religion survey data and congregation/membership data","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CESSDA Data Catalogue REST API","u":"https://datacatalogue.cessda.eu/documentation/rest-api.html","co":"Cessda","f":"Free, keyless; OpenAPI REST search over DDI-Lifecycle metadata from 20+ European archives (endpoint api.tech.cessda.eu)","p":"n/a","b":"Discovering European social science datasets across national archives","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DHS Program API (Demographic and Health Surveys)","u":"https://api.dhsprogram.com/","co":"Dhsprogram","f":"Free, keyless; RESTful access to ~1,500 aggregated indicators across 90+ countries (countries, surveys, indicators, datasets, geometry endpoints)","p":"n/a","b":"Population/health/HIV/nutrition indicators across developing countries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"European Social Survey (ESS) Data Portal + API","u":"https://ess.sikt.no/","co":"Sikt","f":"Free after registration; round/country files (CSV/DTA/SAV), subset tool; beta REST API at api.ess.sikt.no/docs (user ID for usage stats, not auth)","p":"n/a","b":"Cross-national European attitudes/behavior survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Eurostat SDMX / Statistics REST API","u":"https://ec.europa.eu/eurostat/web/user-guides/data-browser/api-data-access/api-introduction","co":"European Commission","f":"Free, keyless; SDMX 2.1/3.0, JSON-stat, SDMX-CSV; full datasets, subsets, and catalogue API","p":"n/a","b":"EU official statistics and survey aggregates (microdata via NSI accreditation)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Generations & Gender Programme (GGP) Data","u":"https://www.ggp-i.org/data/","co":"Ggp i","f":"Free for non-commercial scientific use via GGP Data Portal; register + accept access policy","p":"n/a","b":"Cross-national panel data on family/fertility/life-course","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GESIS Search (social science data) OAI-PMH / metadata API","u":"https://search.gesis.org/","co":"Gesis","f":"Free; OAI-PMH harvesting (DataCite/OpenAIRE) plus DDI/Dublin Core metadata; direct dataset downloads after registration","p":"n/a","b":"German/European social science survey metadata and microdata discovery","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GSS Data Explorer (NORC, General Social Survey)","u":"https://gssdataexplorer.norc.org/","co":"Norc","f":"Free; search/extract/export full or custom GSS datasets (SAS/Stata/SPSS); keyless Quick Downloads, free account for extracts","p":"n/a","b":"US General Social Survey trends and custom microdata extracts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Harvard Dataverse Native + Search API","u":"https://guides.dataverse.org/en/latest/api/native-api.html","co":"Dataverse","f":"Free; Search API keyless for public content; native API + token for deposits/restricted; 75k+ datasets","p":"n/a","b":"Open social science research datasets and replication archives","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ICPSR (Inter-university Consortium for Political and Social Research)","u":"https://www.icpsr.umich.edu/","co":"Umich","f":"Free open-access subset; full archive needs member-institution login (R 'icpsrdata' automates downloads)","p":"Institutional membership (varies)","b":"World's largest social science data archive, thousands of studies","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"IPUMS Microdata Extract API","u":"https://developer.ipums.org/","co":"Ipums","f":"Free w/ API key; JSON extract requests for IPUMS USA, CPS, International, NHGIS, ATUS/AHTUS/MTUS, MEPS, NHIS, DHS","p":"n/a","b":"Harmonized census/survey microdata extracts programmatically","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Latinobarometro Online Analysis Platform","u":"https://www.latinobarometro.org/online-analysis","co":"Latinobarometro","f":"Free, no registration; browser cross-tabs/maps (JDSurvey), export to Excel/PDF/PNG; datasets downloadable","p":"n/a","b":"Latin American public opinion survey data and online analysis","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"LIS Cross-National Data Center (LISSY remote execution)","u":"https://www.lisdatacenter.org/our-data/lis-database/","co":"Lisdatacenter","f":"Free Key Figures, DART & Compare.It web tools; harmonized microdata (52 countries) via LISSY remote submission for registered researchers (no direct download)","p":"n/a (free for social science research)","b":"Harmonized cross-national income/wealth household microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NADA (National Data Archive) REST API / IHSN catalogs","u":"https://nada.ihsn.org/","co":"Ihsn","f":"Free, keyless; open-source NADA platform (used by 80+ national/IHSN catalogs) exposes a REST search/browse API","p":"n/a","b":"Programmatic search of national survey & census catalogs worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OECD Data Explorer SDMX API","u":"https://data-explorer.oecd.org/","co":"OECD","f":"Free, keyless; RESTful SDMX-JSON/XML/CSV; query builder in Data Explorer (replaced OECD.Stat July 2024)","p":"n/a","b":"OECD harmonized macro/social/economic indicators programmatically","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Pew Research Center Datasets","u":"https://www.pewresearch.org/datasets/","co":"Pewresearch","f":"Free; case-level microdata for secondary analysis after embargo; free account to download","p":"n/a","b":"US/global public opinion and social trends survey microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Roper Center iPoll (Cornell)","u":"https://ropercenter.cornell.edu/ipoll/","co":"Cornell","f":"Free question search (750k+ questions, 1935-present); full datasets/crosstabs require member-institution subscription or per-dataset purchase","p":"Institutional subscription / per-dataset purchase (varies)","b":"Historical US/international public opinion poll question archive","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"SDA Berkeley (Survey Documentation and Analysis)","u":"https://sda.berkeley.edu/","co":"Berkeley","f":"Free, keyless web analysis; online crosstabs and subset/codebook export (SAS/SPSS/Stata/DDI) for GSS, ANES, SCF, etc.","p":"n/a","b":"Online tabulation/subsetting of major US survey datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SHARE-ERIC (Survey of Health, Ageing and Retirement in Europe)","u":"https://share-eric.eu/data/data-access","co":"Share eric","f":"Free for scientific use worldwide after individual registration; panel data on 150k+ Europeans aged 50+ across 28 countries","p":"n/a","b":"Longitudinal European aging, health, economics, biomarkers microdata","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"UK Data Service (Discover catalogue)","u":"https://ukdataservice.ac.uk/","co":"Ukdataservice","f":"Free browse/metadata via Discover catalogue (no registration); download needs free registration; secure data via accredited routes","p":"n/a (free for research/academic use)","b":"UK major surveys and census microdata discovery and access","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Understanding Society (UK Household Longitudinal Study)","u":"https://www.understandingsociety.ac.uk/documentation/access-data/","co":"Understandingsociety","f":"Free via UK Data Service after free registration; tiered access (open/Special Licence/Secure Lab) for the UK panel incorporating BHPS","p":"n/a","b":"UK household panel microdata on income, health, employment over time","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"UNICEF MICS (Multiple Indicator Cluster Surveys)","u":"https://mics.unicef.org/","co":"Unicef","f":"Free; microdata by request/permission; MICS Tabulator online tool (MICS2-present); no formal API","p":"n/a","b":"Child/woman welfare survey microdata across low/middle-income countries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"World Bank Microdata Library (NADA REST API)","u":"https://microdata.worldbank.org/index.php/catalog","co":"World Bank","f":"Free, keyless catalog/metadata search via NADA REST API; ~6,900 studies, many openly downloadable","p":"n/a","b":"Census/survey microdata from developing countries with DDI metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"World Values Survey (WVS) data & online analysis","u":"https://www.worldvaluessurvey.org/WVSContents.jsp?CMSID=Documentation","co":"Worldvaluessurvey","f":"Free; download wave/country files (SPSS/Stata/SAS/R/Excel) and online analysis; registration, no API key","p":"n/a","b":"Global values/attitudes survey microdata across waves","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"Telecom & Connectivity","count":27,"entries":[{"n":"Abstract API Phone Validation / HLR Lookup","u":"https://www.abstractapi.com/tools/hlr-lookup","co":"Abstractapi","f":"Free w/ key (limited monthly quota)","p":"paid plans from ~$9/mo","b":"Phone validation, carrier, HLR live network status","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"beaconDB","u":"https://beacondb.net/","co":"Beacondb","f":"Free, keyless (community aGPS, public-domain dumps)","p":"n/a","b":"WiFi/cell/Bluetooth geolocation, MLS successor","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Cloudflare Radar / Speed Test API","u":"https://radar.cloudflare.com/speedtest","co":"Cloudflare","f":"Free w/ key (Radar API); keyless browser speed test","p":"n/a","b":"Network quality measurement and internet trends data","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"FCC Area & Census Block API (geo.fcc.gov)","u":"https://geo.fcc.gov/api/census/","co":"FCC","f":"Free, keyless","p":"n/a","b":"Lat/long to FIPS census block, county, population","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FCC Contours API (geo.fcc.gov)","u":"https://geo.fcc.gov/api/contours/","co":"FCC","f":"Free, keyless","p":"n/a","b":"AM/FM/TV broadcast service-area coverage contours","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FCC ECFS Public API (Electronic Comment Filing System)","u":"https://www.fcc.gov/ecfs/help/public_api","co":"FCC","f":"Free w/ key (data.gov api.data.gov key)","p":"n/a","b":"Search FCC regulatory filings/dockets programmatically","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FCC License View API","u":"https://www.fcc.gov/reports-research/developers/license-view-api","co":"FCC","f":"Free, keyless","p":"n/a","b":"High-level FCC license/callsign lookup across services","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FCC National Broadband Map / Broadband Data Collection (BDC) Public Data API","u":"https://www.fcc.gov/BroadbandData","co":"FCC","f":"Free, keyless (public bulk + REST API)","p":"n/a","b":"US fixed/mobile broadband availability by location","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FCC Spectrum Dashboard API","u":"https://www.fcc.gov/reports-research/developers/spectrum-dashboard-api","co":"FCC","f":"Free, keyless","p":"n/a","b":"Spectrum ownership overview 225 MHz to 3700 MHz","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FCC Universal Licensing System (ULS) data","u":"https://www.fcc.gov/licensing-databases/search-fcc-databases","co":"FCC","f":"Free, keyless (daily bulk pipe-delimited downloads)","p":"n/a","b":"Full wireless spectrum license records, daily updated","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HLR-Lookups.com","u":"https://www.hlr-lookups.com/","co":"Hlr lookups","f":"Free w/ key, ~100 trial lookups","p":"pay-as-you-go per lookup","b":"SS7 HLR/MNP lookups, ported-number detection, high volume","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IPinfo Lite API","u":"https://ipinfo.io/lite","co":"Ipinfo","f":"Free w/ key, unlimited country+ASN","p":"Core plan from ~$99/mo (carrier/MCC-MNC)","b":"IP to ASN/org; carrier data on paid tiers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"IPQualityScore Free Carrier / HLR Lookup","u":"https://www.ipqualityscore.com/free-carrier-lookup","co":"Ipqualityscore","f":"Free w/ key (limited monthly lookups)","p":"paid plans usage-based","b":"Carrier/HLR status, active line, fraud scoring","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ITU DataHub (World Telecommunication/ICT Indicators)","u":"https://datahub.itu.int/","co":"ITU","f":"Free (open data portal, bulk export)","p":"n/a","b":"Global telecom/broadband/ICT subscription statistics","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"M-Lab NDT (Measurement Lab Network Diagnostic Test)","u":"https://www.measurementlab.net/develop/","co":"Measurementlab","f":"Free, keyless (open CC0 data + test infra)","p":"n/a","b":"Open network speed/diagnostic tests and global data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MCC-MNC Lookup (mcc-mnc-lookup.com)","u":"https://mcc-mnc-lookup.com/","co":"Mcc mnc lookup","f":"Free (REST API + CSV/JSON downloads)","p":"n/a","b":"Mobile country/network codes to operator mapping","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Neutrino API HLR Lookup","u":"https://www.neutrinoapi.com/api/hlr-lookup/","co":"Neutrinoapi","f":"Free w/ key (limited daily on free plan)","p":"paid plans from ~$10/mo","b":"HLR validity/carrier lookup plus broader API toolkit","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"numlookupapi","u":"https://numlookupapi.com/","co":"Numlookupapi","f":"Free w/ key, ~100/mo","p":"paid plans from ~$19/mo","b":"Phone number validation, carrier and line-type lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"numverify (apilayer)","u":"https://numverify.com/","co":"Numverify","f":"Free w/ key, 100/mo","p":"$14.99/mo (5k requests)","b":"Phone validation with carrier/line type, 232 countries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ofcom Broadband & Mobile Coverage APIs (UK)","u":"https://api.ofcom.org.uk/","co":"Ofcom","f":"Free w/ registration (Azure APIM developer portal)","p":"n/a","b":"UK fixed broadband speed and mobile coverage by postcode","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Ookla Open Data (Speedtest Global Performance Tiles)","u":"https://github.com/teamookla/ookla-open-data","co":"Teamookla","f":"Free, keyless (S3 bulk Parquet/Shapefile)","p":"n/a","b":"Global fixed/mobile speed+latency by map tile","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenCelliD (Unwired Labs)","u":"https://www.opencellid.org/","co":"Opencellid","f":"Free w/ key (contributors), CC-BY-SA bulk downloads","p":"n/a","b":"Largest open cell-tower geolocation database","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"RIPE Atlas API","u":"https://atlas.ripe.net/docs/apis/rest-api-reference/","co":"Ripe","f":"Free w/ key (credits earned by hosting probes)","p":"n/a","b":"Global active internet measurements (ping/traceroute/DNS)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Telnyx Number Lookup API","u":"https://developers.telnyx.com/docs/identity/number-lookup/quickstart","co":"Telnyx","f":"Free trial credit w/ account","p":"~$0.006 per carrier/portability lookup","b":"Phone validation, carrier, portability and caller name","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Twilio Lookup API","u":"https://www.twilio.com/docs/lookup","co":"Twilio","f":"Free basic validation/formatting tier","p":"~$0.008 per carrier/line-type lookup","b":"Phone validation, carrier, line type, fraud signals","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Veriphone","u":"https://veriphone.io/","co":"Veriphone","f":"Free w/ key, 1,000 credits","p":"from ~$0.0002/validation","b":"Fast phone validation, carrier and line-type detection","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"WiGLE (Wireless Geographic Logging Engine)","u":"https://wigle.net/","co":"Wigle","f":"Free w/ key (rate scales with contributions)","p":"n/a","b":"Crowd-sourced WiFi/cell/Bluetooth network geolocation","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Theses & dissertations","count":22,"entries":[{"n":"BASE — Bielefeld Academic Search Engine","u":"https://www.base-search.net/about/en/about_develop.php","co":"Base search","f":"Free web interface; HTTP API requires IP-whitelisting + key registration","p":"n/a","b":"300M+ docs incl. theses across 11k+ providers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CORE API","u":"https://core.ac.uk/services/api","co":"CORE","f":"Free w/ key; aggregates OA papers/theses from repositories","p":"n/a (contact for higher quota)","b":"Full-text OA aggregation incl. repository theses","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Crossref REST API","u":"https://api.crossref.org/","co":"Crossref","f":"Free, keyless (polite pool w/ email); CC0 metadata","p":"Plus n/a for basic; Metadata Plus paid for SLA","b":"Filter type=dissertation across registered DOIs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DART-Europe E-theses Portal","u":"https://www.dart-europe.org/","co":"Dart europe","f":"Free, keyless (aggregates via OAI-PMH, Dublin Core)","p":"n/a","b":"1M+ European doctoral theses, 500+ universities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DataCite REST API","u":"https://support.datacite.org/docs/api","co":"DataCite","f":"Free, keyless; CC0 metadata, JSON","p":"n/a","b":"Querying thesis DOIs/metadata (incl. EThOS records)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"DiVA Portal (Sweden/Scandinavia) OAI-PMH","u":"https://www.diva-portal.org/","co":"Diva portal","f":"Free, keyless OAI-PMH (oai_dc, MODS); JSON/CSV exports","p":"n/a","b":"Swedish university theses & student papers, 50 institutions","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DNB DissOnline (German National Library)","u":"https://www.dnb.de/EN/Professionell/Services/Dissonline/dissonline_node.html","co":"Dnb","f":"Free; OAI-PMH harvesting + DNB SRU API","p":"n/a","b":"Largest European online dissertation collection, 400k+","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DNB SRU API (Deutsche Nationalbibliothek)","u":"https://www.dnb.de/EN/Professionell/Metadatendienste/Datenbezug/SRU/sru_node.html","co":"Dnb","f":"Free, keyless SRU (MARC21-xml, RDF, Dublin Core)","p":"n/a","b":"Programmatic German dissertation catalog queries","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EBSCO Open Dissertations","u":"https://opendissertations.org/","co":"Opendissertations","f":"Free web access; metadata harvested via OAI-PMH","p":"n/a","b":"1.4M+ free ETDs (former NDLTD/H.W.Wilson merge)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EThOS — British Library e-theses (DataCite/OAI metadata)","u":"https://www.bl.uk/collection/ethos","co":"Bl","f":"Free metadata via DataCite/OAI-PMH; bulk CSV (interim metadata-only service relaunching early 2026)","p":"n/a (full text via institutional repos)","b":"UK doctoral thesis metadata, 600k+ records","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"HAL Theses API (CCSD/CNRS)","u":"https://api.archives-ouvertes.fr/docs/search","co":"Archives ouvertes","f":"Free, keyless Solr REST API (JSON/XML/CSV)","p":"n/a","b":"French open archive theses & HDR full text","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NDLTD Global ETD Search","u":"https://ndltd.org/thesis-resources/global-etd-search/","co":"Ndltd","f":"Currently OFFLINE/rebuilding; NDLTD recommends OATD instead","p":"n/a","b":"International ETD discovery aggregator (in transition)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OATD — Open Access Theses and Dissertations","u":"https://oatd.org/","co":"Oatd","f":"Free, keyless (web search; metadata harvested via OAI-PMH)","p":"n/a","b":"Searching 6.6M+ open-access graduate theses worldwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenAIRE Graph / EXPLORE API","u":"https://graph.openaire.eu/docs/apis/home/","co":"OpenAIRE","f":"Free, keyless public API (token only to raise rate limit)","p":"n/a","b":"EU research graph incl. theses & dissertations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenAlex API","u":"https://docs.openalex.org/api-entities/works","co":"OpenAlex","f":"Free, keyless (polite pool w/ email, 100k req/day)","p":"Premium n/a (data dumps free)","b":"Filtering works by type=dissertation, millions of items","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenDOAR (Directory of Open Access Repositories)","u":"https://v2.sherpa.ac.uk/opendoar/","co":"Sherpa","f":"Free w/ key (JISC SHERPA API)","p":"n/a","b":"Directory of repositories hosting ETDs (find OAI endpoints)","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenThesis.org","u":"http://www.openthesis.org/","co":"Openthesis","f":"Free web search/upload; no documented public API","p":"n/a","b":"Free repository of uploaded theses/dissertations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"PQDT Open (ProQuest)","u":"https://pqdtopen.proquest.com/","co":"Proquest","f":"Free; OAI Data Provider for harvesting OA dissertations","p":"n/a (PQDT Global is subscription)","b":"Free full-text OA ProQuest dissertations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"RCAAP — Repositório Científico de Acesso Aberto de Portugal","u":"https://www.rcaap.pt/","co":"Rcaap","f":"Free, keyless OAI-PMH aggregation across Portuguese repos","p":"n/a","b":"Portuguese/Lusophone theses & dissertations discovery","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Semantic Scholar Academic Graph API","u":"https://api.semanticscholar.org/api-docs/","co":"Semantic Scholar","f":"Free, keyless (shared pool, ~100 req/5min); key for higher limits","p":"n/a","b":"Scholarly graph incl. some theses, citations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Theses.fr API (ABES)","u":"https://www.data.gouv.fr/dataservices/api-interroger-les-donnees-de-theses-fr","co":"Theses","f":"Free, keyless REST API (JSON); bulk export CSV/XML/BibTeX, Etalab license","p":"n/a","b":"French doctoral theses since 1985, rich linked metadata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Trove API (National Library of Australia)","u":"https://trove.nla.gov.au/about/create-something/using-api","co":"Nla","f":"Free w/ key (registration required)","p":"n/a","b":"Australian theses + library catalog metadata","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Tourism, Travel-tech & Recreation","count":29,"entries":[{"n":"AeroDataBox API","u":"https://aerodatabox.com/","co":"Aerodatabox","f":"Free plan via API.market; flight status, airports, aircraft data","p":"from ~$5/mo (RapidAPI from $0.99)","b":"Affordable flight status, schedules, airport & aircraft info","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AirportDB","u":"https://airportdb.io/","co":"Airportdb","f":"Free, keyless (~60k airports JSON: runways, frequencies, navaids)","p":"n/a","b":"Detailed airport lookups by ICAO code (JSON)","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Amadeus for Developers (Self-Service)","u":"https://developers.amadeus.com/self-service","co":"Amadeus","f":"Free monthly test quota (flights, hotels, transfers)","p":"Pay-as-you-go per call in production","b":"Flight & hotel search/booking, travel inspiration","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Aviationstack","u":"https://aviationstack.com/","co":"Aviationstack","f":"Free w/ key, 100 req/mo (real-time flight status)","p":"from $49.99/mo","b":"Real-time & historical flight tracking, schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Booking.com Demand API (affiliate partner)","u":"https://developers.booking.com/","co":"Booking","f":"Free w/ approved affiliate/partner account (accommodations search & booking)","p":"n/a (booking commission model)","b":"Hotel/accommodation availability, pricing & booking integration","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FlightLabs / GoFlightLabs","u":"https://www.goflightlabs.com/","co":"Goflightlabs","f":"Free trial w/ key (flight status, schedules, airports, airlines)","p":"from ~$49/mo","b":"Real-time flight data, schedules, future flight prediction","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Foursquare Places API","u":"https://docs.foursquare.com/data-products/docs/places-api","co":"Foursquare","f":"Free dev account w/ $200/mo usage credits + 500 free Pro calls (from Jun 1, 2026)","p":"Pay-as-you-go (Pro $15/1k, Premium from ~$18.75/1k calls)","b":"100M+ global verified POIs, search & autocomplete","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Geoapify Places API","u":"https://www.geoapify.com/places-api/","co":"Geoapify","f":"Free w/ key, ~3,000 req/day (POI search by category, no card)","p":"from ~$59/mo","b":"Categorized POIs: attractions, lodging, restaurants","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GeoNames","u":"https://www.geonames.org/export/web-services.html","co":"Geonames","f":"Free w/ username, 25M+ place names, CC-BY; daily credit limits","p":"Commercial premium credits available","b":"Global gazetteer, place names, nearby toponyms for travel","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GetYourGuide Partner API","u":"https://code.getyourguide.com/partner-api-spec/","co":"Getyourguide","f":"Free w/ partner token (access tiers have traffic/booking requirements)","p":"n/a (affiliate commission)","b":"Activities/experiences inventory & booking integration","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mobility Database (MobilityData)","u":"https://mobilitydatabase.org/","co":"Mobilitydatabase","f":"Free, catalog of 6000+ GTFS/GTFS-RT/GBFS feeds across 99+ countries","p":"n/a","b":"Discovering transit & bikeshare feeds worldwide","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"National Park Service (NPS) Data API","u":"https://www.nps.gov/subjects/developer/api-documentation.htm","co":"Nps","f":"Free w/ key, authoritative NPS parks/visitor data, hourly rate limits","p":"n/a","b":"US national parks info, alerts, events, visitor centers, hours","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Nominatim (OpenStreetMap)","u":"https://nominatim.org/","co":"Nominatim","f":"Free, keyless public endpoint (fair-use; 1 req/sec); self-host option","p":"n/a","b":"Geocoding/reverse-geocoding place names for travel apps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenFlights Database","u":"https://openflights.org/data.php","co":"Openflights","f":"Free, keyless data dumps (airports, airlines, routes; 10k+ nodes)","p":"n/a","b":"Airport/airline/route reference data for travel apps","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenSky Network API","u":"https://openskynetwork.github.io/opensky-api/","co":"Openskynetwork","f":"Free; 400 req/day anonymous, 4000/day registered (ADS-B live air traffic)","p":"n/a (free for non-commercial/research)","b":"Live & historical flight tracking, aircraft positions","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenTripMap API","u":"https://dev.opentripmap.org/product","co":"Opentripmap","f":"Free w/ key, limited daily requests (tourist POIs/attractions)","p":"from ~$19/mo","b":"Tourist attractions & sightseeing POI data with descriptions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenWeatherMap (One Call / Current)","u":"https://openweathermap.org/api","co":"Openweathermap","f":"Free w/ key, 1,000 calls/day (current, forecast, geocoding)","p":"Pay-as-you-go / from ~$40/mo","b":"Destination weather/forecast for trip planning apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OurAirports (open data)","u":"https://ourairports.com/data/","co":"Ourairports","f":"Free, keyless, public domain CSV dumps (~40k airports/heliports)","p":"n/a","b":"Global airport/airstrip/heliport reference dataset","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Overpass API (OpenStreetMap)","u":"https://wiki.openstreetmap.org/wiki/Overpass_API","co":"OpenStreetMap","f":"Free, keyless public endpoints (fair-use); self-host option","p":"n/a","b":"Querying OSM POIs: attractions, hotels, restaurants by tag/area","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Protected Planet API (WDPA/WDPCA, UNEP-WCMC & IUCN)","u":"https://api.protectedplanet.net/documentation","co":"Protectedplanet","f":"Free w/ token, global protected areas (parks/reserves), 312k+ PAs","p":"n/a","b":"Worldwide national parks & protected-area boundaries/data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Recreation.gov RIDB API (Recreation Information Database)","u":"https://ridb.recreation.gov/docs","co":"Recreation","f":"Free w/ key, federal recreation data from 12 agencies (campsites, tours, permits, facilities)","p":"n/a","b":"US federal campgrounds, permits, recreation sites & facilities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transitland (Interline)","u":"https://www.transitland.org/documentation/","co":"Transitland","f":"Free w/ key, aggregated global GTFS + GTFS-Realtime as JSON/GeoJSON","p":"n/a","b":"Worldwide transit feeds, routes, stops, realtime for tourists","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transport for London (TfL) Unified API","u":"https://api.tfl.gov.uk/","co":"UK Government","f":"Free w/ registration, 500 req/min plan (Tube, bus, journey planner)","p":"n/a","b":"London transit, journey planning, arrivals for tourists","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Travelpayouts / Aviasales Data API","u":"https://travelpayouts.github.io/slate/","co":"Travelpayouts","f":"Free w/ affiliate token (cached flight prices, popular destinations)","p":"n/a (affiliate/commission model)","b":"Cheap-fare price trends, flight price calendars","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Tripadvisor Content API","u":"https://developer-tripadvisor.com/content-api/","co":"Developer tripadvisor","f":"Free w/ key, first 5,000 calls/mo (card required for overage)","p":"Pay-as-you-go per call after free calls","b":"Hotel/restaurant/attraction details, ratings, reviews","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USGS National Digital Trails / Trails Dataset","u":"https://www.usgs.gov/national-digital-trails/data","co":"USGS","f":"Free, keyless GIS files & ArcGIS REST service endpoints","p":"n/a","b":"US nationwide public-domain hiking/recreation trail geodata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Viator Partner / Affiliate API","u":"https://docs.viator.com/partner-api/","co":"Viator","f":"Free affiliate account = Basic API access (300k+ tours & activities)","p":"n/a (booking commission)","b":"Tours, activities & experiences booking/listings","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Wikivoyage (Wikimedia)","u":"https://api.wikimedia.org/wiki/Use_cases/Travel","co":"Wikimedia","f":"Free, keyless MediaWiki API; structured data via Wikimedia Enterprise","p":"Enterprise paid tier for bulk/structured feeds","b":"Open crowd-sourced travel guides & destination content","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Yelp Fusion (Places) API","u":"https://docs.developer.yelp.com/docs/places-intro","co":"Yelp","f":"30-day trial, 5,000 calls (eval only) — no permanent free tier","p":"from $7.99 per 1,000 calls","b":"Local businesses, restaurants, reviews for travelers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"Transportation, Rail, Trucking & Freight","count":31,"entries":[{"n":"511.org Open Data (SF Bay Area)","u":"https://511.org/open-data","co":"511","f":"Free w/ token","p":"n/a","b":"Bay Area transit, traffic events, parking feeds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Amtraker API","u":"https://api.amtraker.com/","co":"Amtraker","f":"Free, keyless community API","p":"n/a","b":"Live Amtrak/Brightline/VIA train positions, ETAs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Aviationstack","u":"https://aviationstack.com/","co":"Aviationstack","f":"Free w/ key, 100 req/mo","p":"~$50/mo entry plan","b":"Real-time and historical flight/airport data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"BTS Open Data Platform (USDOT)","u":"https://data.bts.gov/","co":"Bts","f":"Free, keyless (Socrata)","p":"n/a","b":"US transportation statistics, freight, NTAD geodata","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Deutsche Bahn transport.rest (v6.db)","u":"https://v6.db.transport.rest/","co":"Transport","f":"Free, keyless; 100 req/min limit","p":"n/a","b":"German rail/regional departures, journeys, delays","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FlightAware AeroAPI","u":"https://www.flightaware.com/commercial/aeroapi/","co":"Flightaware","f":"Free personal tier (limited monthly credit)","p":"Usage-based pricing after free credit","b":"Flight tracking, status, positions, schedules","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FMCSA QCMobile API","u":"https://mobile.fmcsa.dot.gov/QCDevsite/docs/qcApi","co":"U.S. DOT","f":"Free w/ webkey","p":"n/a","b":"US motor carrier safety, authority, insurance lookup","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Freightos Terminal / FBX API","u":"https://developer.freightos.com/apis","co":"Freightos","f":"Free estimate API + free Terminal account; some FBX metrics free","p":"Paid for data exports / granular rate data","b":"Ocean/air/trucking freight rate benchmarks & FBX index","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GBFS (General Bikeshare Feed Spec)","u":"https://gbfs.org/","co":"Gbfs","f":"Free, keyless (public feeds)","p":"n/a","b":"Real-time bike/scooter/shared-mobility availability","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HERE Location Services","u":"https://www.here.com/developer/rest-apis","co":"HERE","f":"Freemium, up to 250k transactions/mo","p":"~$2.50 per 1k after free tier","b":"Truck routing, transit, traffic, matrix","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Mapbox Navigation APIs","u":"https://docs.mapbox.com/api/navigation/","co":"Mapbox","f":"Free tier (e.g. 100k matrix elements/mo)","p":"~$2 per 1k requests after free tier","b":"Directions, matrix, ETAs w/ live traffic","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"MBTA V3 API (Boston)","u":"https://www.mbta.com/developers/v3-api","co":"Mbta","f":"Free w/ key, 1000 req/min","p":"n/a","b":"Boston transit GTFS + GTFS-RT JSON:API predictions","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Mobility Database (MobilityData)","u":"https://mobilitydatabase.org/","co":"Mobilitydatabase","f":"Free w/ key, open catalog","p":"n/a","b":"Catalog of 6000+ GTFS/GTFS-RT/GBFS feeds worldwide","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MTA (New York) Real-Time Feeds","u":"https://api.mta.info/","co":"Mta","f":"Free, keyless (key no longer required)","p":"n/a","b":"NYC subway/LIRR/Metro-North GTFS-RT real-time data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Network Rail Open Data Feeds","u":"https://datafeeds.networkrail.co.uk/ntrod/","co":"Networkrail","f":"Free w/ registration","p":"n/a","b":"UK train movements (TRUST), schedules, TD feeds","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NREL Alternative Fuel Stations API","u":"https://developer.nrel.gov/docs/transportation/alt-fuel-stations-v1/","co":"NREL","f":"Free w/ key, 1000 req/hr","p":"n/a","b":"US EV charging + alt-fuel station locations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open Charge Map API","u":"https://openchargemap.org/site/develop/api","co":"Openchargemap","f":"Free w/ key, open registry","p":"n/a","b":"Global crowd-sourced EV charging station registry","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenRouteService","u":"https://openrouteservice.org/","co":"Openrouteservice","f":"Free w/ key, ~2000 req/day","p":"n/a","b":"Routing, isochrones, matrix incl. heavy-vehicle","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenSky Network API","u":"https://openskynetwork.github.io/opensky-api/","co":"Openskynetwork","f":"Free w/ account (anonymous limited)","p":"n/a","b":"Live aircraft/flight positions (ADS-B) crowdsourced","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Overpass API (OpenStreetMap)","u":"https://overpass-api.de/","co":"Overpass api","f":"Free, keyless (public instances)","p":"n/a","b":"Query OSM roads, rail lines, stations, infrastructure","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Project OSRM","u":"https://project-osrm.org/","co":"Project osrm","f":"Free, keyless demo server / self-host","p":"n/a","b":"Open-source road routing engine, self-hostable","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ShipsGo Container Tracking API","u":"https://shipsgo.com/ocean/container-tracking-api","co":"Shipsgo","f":"Free trial w/ 3 tracking credits","p":"Pay-as-you-go credits / subscription","b":"Ocean container tracking across 160+ carriers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"TomTom Traffic APIs","u":"https://developer.tomtom.com/traffic-api/documentation/tomtom-maps/v1/product-information/introduction","co":"Tomtom","f":"Free dev tier ~2500 req/day","p":"Pay-as-you-go after free tier","b":"Real-time traffic incidents and flow data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transitland (Interline)","u":"https://www.transit.land/documentation","co":"Transit","f":"Free w/ API key, generous limits","p":"n/a","b":"Global GTFS + GTFS-Realtime feed aggregator/registry","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Transport for London Unified API","u":"https://api-portal.tfl.gov.uk/","co":"UK Government","f":"Free w/ app_id + app_key","p":"n/a","b":"London tube/bus/rail status, journeys, arrivals","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"UK National Rail Darwin Data Feeds","u":"https://www.nationalrail.co.uk/developers/darwin-data-feeds/","co":"Nationalrail","f":"Free push/SOAP feeds w/ registration","p":"n/a","b":"UK live train departures, delays, cancellations","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"USDOT Open Data Portal","u":"https://data.transportation.gov/","co":"Transportation","f":"Free, keyless (Socrata)","p":"n/a","b":"DOT trucking, transit, safety datasets via API","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WMATA Developer API","u":"https://developer.wmata.com/","co":"Wmata","f":"Free w/ key, 10 req/sec default","p":"n/a","b":"DC Metro rail/bus arrivals, alerts, elevator status","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DAT RateView / iQ","u":"https://www.dat.com/rateview","co":"Dat","f":"none","p":"Paid subscription","b":"US truckload spot & contract freight rate data","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"SpotHero Developer Platform","u":"https://spothero.com/developers","co":"Spothero","f":"none (partner access)","p":"Partnership/quote","b":"Off-street parking search and reservations","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Vizion API","u":"https://www.vizionapi.com/","co":"Vizionapi","f":"none (demo/quote)","p":"Subscription / quote","b":"Real-time container + rail shipment visibility","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"US defense spending, procurement & contracts","count":49,"entries":[{"n":"Army Financial Management & Comptroller (ASAFM) Budget Materials","u":"https://www.asafm.army.mil/Budget-Materials/","co":"Army","f":"Free, keyless. Army-specific budget justification books, P-1/R-1/O-1 exhibits.","p":"N/A","b":"Service-level (Army) procurement/RDT&E line-item budget detail; pattern repeats for Navy (FMB) and Air Force (SAF/FM).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Atlantic Council NATO Defense Spending Tracker","u":"https://www.atlanticcouncil.org/commentary/trackers-and-data-visualizations/nato-defense-spending-tracker/","co":"Atlanticcouncil","f":"Free, keyless interactive tracker/visualization of NATO member defense spending vs the 2% (and new 5%) GDP commitments. No API; web/data viz.","p":"N/A","b":"Quick analyst-friendly view of allied burden-sharing trends to contextualize U.S. defense spending.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"CSIS Defense-Industrial Initiatives Group (DIIG) Lookup Tables","u":"https://github.com/CSISdefense/Lookup-Tables","co":"CSISdefense","f":"Free, open data (CSV/XLS). Reference crosswalks (PSC, NAICS, contracting offices, vendor parents, system/equipment codes) used in CSIS defense procurement…","p":"N/A","b":"Normalizing/aggregating defense contract data (parent-company rollups, office/PSC mapping) for analysis.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Deltek GovWin IQ","u":"https://iq.govwin.com/neo/marketAnalysis/index","co":"Govwin","f":"Free trial offered; no free API tier. Pre-RFP intelligence, opportunity/task-order search, labor-rate analysis, budget forecasts, relationship/people mapping.","p":"Paid subscription (enterprise; typically several thousand USD/month depending on…","b":"Enterprise defense capture/BD: pre-solicitation pipeline, teaming, program-manager/contracting-officer mapping.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DLA Internet Bid Board System (DIBBS)","u":"https://www.dibbs.bsm.dla.mil/","co":"Dla","f":"Free, keyless search of RFQs/RFPs/IFBs/awards; thousands of solicitations weekly, many not posted elsewhere. Web search/scrape (bidding requires separate…","p":"N/A","b":"DLA supply-item solicitations and awards (commodities/spare parts) not in SAM.gov - net-new defense procurement channel.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD Comptroller (OUSD-C) Budget Materials / Green Book","u":"https://comptroller.defense.gov/Budget-Materials/","co":"Defense","f":"Free, keyless PDFs/Excel. National Defense Budget Estimates ('Green Book') with BA/TOA/Outlays current+constant dollar history; Program Acquisition Costs by…","p":"N/A","b":"Authoritative DoD budget request and historical defense budget figures (the source for top-line defense budget analysis).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD SBIR/STTR Innovation Portal (dodsbirsttr.mil)","u":"https://www.dodsbirsttr.mil/","co":"Dodsbirsttr","f":"Public submission/solicitation portal exposing public download endpoints (e.g. /submissions/api/public/download/solicitationDocuments). Keyless for public…","p":"N/A","b":"DoD-specific SBIR/STTR solicitations, topics (DARPA, Army, DHA, etc.), and release documents.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD Selected Acquisition Reports (SARs)","u":"https://www.esd.whs.mil/FOID/Reading-Room/Selected_Acquisition_Reports/","co":"Whs","f":"Free, keyless PDFs. Annual SARs for ACAT I Major Defense Acquisition Programs: cost/schedule/performance and unit-cost breaches. DAMIR is the internal…","p":"N/A","b":"Program-level cost/schedule/performance baselines for major weapons programs (F-35, etc.).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD Selected Acquisition Reports (SARs) / DAMIR","u":"https://www.esd.whs.mil/FOID/Reading-Room/Selected_Acquisition_Reports/","co":"Whs","f":"Free, keyless PDFs. Annual SARs for ACAT I Major Defense Acquisition Programs: cost/schedule/performance and unit-cost breaches. DAMIR is the internal…","p":"N/A","b":"Program-level cost/schedule/performance baselines for major weapons programs (F-35, etc.).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD/DoW Daily Contract Announcements (contracts $7.5M+)","u":"https://www.war.gov/News/Contracts/","co":"War","f":"Free, keyless. Published every business day ~5 PM ET; all contract awards >=$7.5M across services. HTML (scrape). Now hosted on war.gov…","p":"N/A","b":"Same-day visibility into large DoD contract awards before they appear in SAM.gov/USAspending (which lag).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DSCA Major Arms Sales (Foreign Military Sales notifications)","u":"https://www.dsca.mil/Press-Media/Major-Arms-Sales","co":"Dsca","f":"Free, keyless. Web archive of FMS cases formally notified to Congress (per AECA 36(b) thresholds; archive of cases prior to Feb 26, 2026). No JSON API…","p":"N/A","b":"Government source of record for U.S. major arms sales / FMS congressional notifications by country and system.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DTIC R&E Gateway / DoD S&T Reports Search","u":"https://discover.dtic.mil/","co":"Dtic","f":"Free, keyless public search (~1M of ~4.7M records public): technical reports, budget exhibits, grant awards, IR&D. Search tools (R&E Gateway). No documented…","p":"N/A","b":"DoD-funded R&D/RDT&E reports, grant awards, and budget exhibits for technology/spending research.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Federal Register API (DSCA arms sales notifications)","u":"https://www.federalregister.gov/developers/documentation/api/v1","co":"Federal Register","f":"Free, keyless JSON API; filter documents by agency (e.g. Defense Security Cooperation Agency 'Arms Sales Notification' notices) and date.","p":"N/A","b":"Structured, queryable feed of officially published arms-sales notifications and other DoD/DSCA rulemakings.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"fpds Python library (ATOM feed wrapper)","u":"https://github.com/dherincx92/fpds","co":"Dherincx92","f":"Free, open-source Python wrapper + CLI for the FPDS ATOM feed (works while ATOM feed lives, retiring Jul 31 2026; migrate to SAM.gov Contract Awards API).","p":"N/A","b":"Quick programmatic pulls of historical FPDS contract actions in Python.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"FPDS-NG ATOM Feed (legacy, being retired)","u":"https://www.fpds.gov/wiki/index.php/ATOM_Feed_FAQ","co":"Fpds","f":"Free, keyless XML/ATOM feed of federal procurement awards. FPDS.gov public site decommissioned Feb 24, 2026; ATOM feed retiring Jul 31, 2026 in favor of the…","p":"N/A","b":"Legacy XML contract-action records; cite for migration context but plan transition to SAM.gov Contract Awards API.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GAO Reports & Testimonies (RSS/XML feeds + widget)","u":"https://www.gao.gov/reports-testimonies","co":"GAO","f":"Free, keyless RSS/XML feeds (GAO Reports, Reports-Brief, Legal Products incl. bid protests) and a reports widget. National Defense topic page filters defense…","p":"N/A","b":"Tracking new GAO defense audit/oversight reports and bid-protest decisions as they publish.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GAO Reports & Testimonies (RSS/XML feeds)","u":"https://www.gao.gov/about/stay-connected","co":"GAO","f":"Free, keyless RSS/XML feeds (GAO Reports, Reports-Brief, Legal Products incl. Comptroller General/bid-protest decisions). National Defense topic page filters…","p":"N/A","b":"Tracking new GAO defense audit/oversight reports and bid-protest decisions as they publish.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GovInfo API (GAO reports, budget, congressional docs)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Requires a free api.data.gov key (40-char). Serves the gaoreports collection (GAO Reports & Comptroller General Decisions, incl. bid-protest decisions)…","p":"N/A","b":"Programmatic access to GAO defense oversight reports and bid-protest/legal decisions plus congressional/budget documents.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GovInfo GAO Reports Collection (browse/bulk)","u":"https://www.govinfo.gov/app/collection/gaoreports","co":"GPO","f":"Free, keyless browse/download of the GAO Reports & Comptroller General Decisions collection; bulk XML via GPO Bulk Data / GovInfo. (Collection is a…","p":"N/A","b":"Bulk historical GAO defense report archive for text/NLP analysis.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GovInfo GAO Reports Collection (bulk browse/download)","u":"https://www.govinfo.gov/app/collection/gaoreports","co":"GPO","f":"Free, keyless browse/download of the GAO Reports & Comptroller General Decisions collection (collection:gaoreports). Searchable by report number, title…","p":"N/A","b":"Bulk historical GAO defense report archive for text/NLP analysis.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GovTribe (federal contract intelligence)","u":"https://govtribe.com/","co":"Govtribe","f":"No free API. Ingests SAM.gov + adds recompete history and contractor award histories. (Original docs.govtribe.com placeholder path was dead; URL corrected to…","p":"Subscription, roughly ~$100-$300/month federal-only; combined federal+SLED higher.…","b":"Mid-market defense BD intelligence: opportunity tracking, recompetes, competitor award histories.","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"GSA CALC+ (Contract-Awarded Labor Category) API","u":"https://open.gsa.gov/api/dx-calc-api/","co":"U.S. GSA","f":"Free and keyless (no credentials/authentication required). Awarded/ceiling labor rates from GSA professional-services schedules. Base…","p":"N/A","b":"Benchmarking labor rates/ceilings for services contracts (useful for defense services pricing).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"HigherGov (federal contracts & opportunities)","u":"https://www.highergov.com/contract/","co":"Highergov","f":"Limited free views on site; full API/exports are paid. Covers prime/sub/IDV awards searchable by many criteria; API key creation requires admin access on a…","p":"Paid subscription tiers (free trial available; API access on higher plans; pricing on…","b":"Commercial enrichment - cleaned, deduped, parent-mapped defense contract + opportunity data with an API on paid plans.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"makegov procurement-tools (Python)","u":"https://github.com/makegov/procurement-tools","co":"Makegov","f":"Free, open-source Python library (Apache 2.0, on PyPI) for federal contracting: UEI validation, USAspending URL helpers, FAR provision lookup, SAM entity…","p":"N/A","b":"Reusable client/utilities to glue together SAM, FPDS, and USAspending pulls. (Corrected from 'tandemgov' - canonical repo is…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"makegov tango-python SDK","u":"https://github.com/makegov/tango-python","co":"Makegov","f":"Free, open-source Python SDK for the Tango API covering federal contracts, IDVs, entities, opportunities, grants, and vehicles with typed responses (Tango…","p":"Tango API backend is a paid commercial service (SDK is free/open-source).","b":"Typed Python access to aggregated federal contract/entity/opportunity data via the Tango API for defense BD tooling.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"makegov/awesome-procurement-data (curated index)","u":"https://github.com/makegov/awesome-procurement-data","co":"Makegov","f":"Free, open (CC0-1.0). Curated list of US federal procurement data resources/APIs - USAspending, SAM.gov APIs, FPDS, CALC, and many tools/utilities.","p":"N/A","b":"Discovery hub for federal/defense procurement data sources and client libraries; good starting map for further scouting.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"makegov/procurement-tools (Python)","u":"https://github.com/makegov/procurement-tools","co":"Makegov","f":"Free, open-source (Apache-2.0) Python library + 'fargo' CLI on PyPI. UEI validation, USASpending award/entity lookups, SAM entity info (needs SAM_API_KEY)…","p":"N/A","b":"Reusable client/utilities to glue together SAM, FPDS, and USAspending pulls.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"NATO Defence Expenditure of NATO Countries (annual report)","u":"https://www.nato.int/en/what-we-do/introduction-to-nato/defence-expenditures-and-natos-5-commitment","co":"Nato","f":"Free, keyless PDF + Excel. Common-definition defence expenditure by member (2014-present series, longer historical back to 1963). No API.","p":"N/A","b":"Allied defense-spending burden-sharing (%GDP) comparisons alongside U.S. figures.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SAM.gov Assistance Listings Public API (CFDA)","u":"https://open.gsa.gov/api/assistance-listings-api/","co":"U.S. GSA","f":"Requires api.sam.gov key (corrected: NOT keyless). Active/inactive federal assistance listings (formerly CFDA). Role-based limits 10-1,000/day. Base…","p":"N/A","b":"Mapping defense-related federal financial assistance / grant programs.","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"SAM.gov Contract Awards API (FPDS successor)","u":"https://open.gsa.gov/api/contract-awards/","co":"U.S. GSA","f":"Requires api.sam.gov key. Role-based quotas: non-fed no-role 10/day; with role or non-fed system 1,000/day; federal system 10,000/day. Base…","p":"N/A (free with key; higher quotas require SAM.gov roles, not payment)","b":"The new authoritative source for federal contract award + IDV data, replacing the retired FPDS (FPDS.gov decommissioned Feb 24, 2026; ATOM feed…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Data Services - Contract Awards Data Dictionary / Variance Doc","u":"https://sam.gov/data-services/Data%20Dictionary/Contract%20Awards?privacy=Public","co":"SAM.gov","f":"Free. Public data dictionary (format, structure, FAR references per data element) plus the FPDS-to-SAM Contract Awards API variance document and bulk data…","p":"N/A","b":"Field-level reference and the mapping/variance doc between legacy FPDS and the SAM.gov Contract Awards API.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"SAM.gov Entity Management API","u":"https://open.gsa.gov/api/entity-api/","co":"U.S. GSA","f":"Requires api.sam.gov key. Public tier: name, UEI, registration, addresses, business types, PSC/NAICS, POCs. Role-based quotas (10 / 1,000 / 10,000 req/day).…","p":"N/A (FOUO/sensitive tiers gated by federal role, not payment)","b":"Identifying and enriching defense vendors/contractors (UEI, registration status, business size, socioeconomic flags).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Entity/Exclusions Extracts Download API","u":"https://open.gsa.gov/api/sam-entity-extracts-api/","co":"U.S. GSA","f":"Requires api.sam.gov key. Bulk file extracts of entity and exclusion records.","p":"N/A","b":"Bulk download of the full registered-vendor and exclusions universe for offline defense vendor analytics.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Exclusions API","u":"https://open.gsa.gov/api/exclusions-api/","co":"U.S. GSA","f":"Requires api.sam.gov key; same role-based daily quotas (10 / 1,000 / 10,000). Base: https://api.sam.gov/entity-information/v4/exclusions . Returns…","p":"N/A","b":"Screening defense vendors for debarment/suspension and compliance (responsibility determinations).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Get Opportunities Public API","u":"https://open.gsa.gov/api/get-opportunities-public-api/","co":"U.S. GSA","f":"Requires api.sam.gov key. Role-based daily limits; mandatory postedFrom/postedTo (MM/dd/yyyy, max 1-year span), max 1,000 records/request. Base…","p":"N/A","b":"Active/historical federal solicitations, RFPs, set-asides, NAICS, deadlines - the canonical free feed for defense contract opportunities.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Opportunity Management API","u":"https://open.gsa.gov/api/opportunities-api/","co":"U.S. GSA","f":"Requires api.sam.gov key + appropriate SAM.gov role. Companion to the public read API; supports retrieving/managing opportunity records and…","p":"N/A","b":"Programmatic access to fuller opportunity records (descriptions, attachments) beyond the public search feed for defense BD pipelines.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Product Service Codes (PSC) Public API","u":"https://open.gsa.gov/api/PSC-Public-API/","co":"U.S. GSA","f":"Requires api.sam.gov key (corrected: NOT keyless). Returns PSC code, name, full name, status, parent code, dates. Base…","p":"N/A","b":"Decoding/normalizing PSC codes that classify what defense contracts buy (services vs supplies vs R&D).","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"SBIR.gov API (Awards / Company / Solicitation)","u":"https://www.sbir.gov/api","co":"Sbir","f":"Free, no key required. Awards: https://api.www.sbir.gov/public/api/awards (filter agency=DOD), plus Company and Solicitation endpoints. JSON/XML, 100…","p":"N/A","b":"Government-wide SBIR/STTR awards filtered to DOD plus firm/solicitation lookups - net-new R&D small-business funding data.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Arms Industry Database (Top 100)","u":"https://www.sipri.org/databases/armsindustry","co":"Sipri","f":"Free, keyless. Top 100 arms-producing and military-services companies (revenue, country). Tabular download. No REST API.","p":"N/A","b":"Identifying/ranking the largest defense contractors globally, including U.S. primes.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Arms Transfers Database","u":"https://armstransfers.sipri.org/","co":"Sipri","f":"Free, keyless web tool. All international transfers of major conventional arms 1950-present (updated annually; latest Mar 2026). Screen + CSV export. No REST…","p":"N/A (open-access)","b":"Global supplier/recipient arms-transfer flows including U.S. exports - the most comprehensive public arms-transfer source.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Military Expenditure Database (MILEX)","u":"https://www.sipri.org/databases/milex","co":"Sipri","f":"Free, keyless. Military spending of countries 1949-2025, in local/constant USD, %GDP, per capita. Excel download; interactive at https://milex.sipri.org/. No…","p":"N/A","b":"Cross-country comparison of U.S. and allied/adversary defense budgets over time.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"State Dept Arms Sales: Congressional Notifications","u":"https://www.state.gov/arms-sales-congressional-notifications","co":"U.S. State Dept","f":"Free, keyless web list of arms-sales congressional notifications (DCS + policy context). No structured API. (DCS notifications also published quarterly in…","p":"N/A","b":"Complement to DSCA for Direct Commercial Sales and State-led arms transfer notifications.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Treasury Fiscal Data API - Monthly Treasury Statement (DoD outlays)","u":"https://fiscaldata.treasury.gov/datasets/monthly-treasury-statement/","co":"U.S. Treasury","f":"Free, keyless JSON/CSV/XML (no account/token). Base: https://api.fiscaldata.treasury.gov/services/api/fiscal_service/ . Outlays by department/agency incl.…","p":"N/A","b":"Actual monthly federal outlays for Defense (cash basis) - independent cross-check on DoD spending.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending - Department of Defense (DOD) Agency Spending Profile + agency endpoints","u":"https://www.usaspending.gov/agency/department-of-defense","co":"USAspending","f":"Free/keyless via the same api.usaspending.gov. DOD agency profile with sub-component breakdowns. NOTE: 90-day delay on DoD contract/subcontract award (File…","p":"N/A","b":"DoD-scoped budget authority, obligations, sub-agency (Army/Navy/AF/etc.) breakdowns, recipient and PSC/NAICS slices for defense.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending API","u":"https://api.usaspending.gov/","co":"USAspending","f":"Fully free and keyless. 200+ REST endpoints (v2). No registration. Covers federal awards, transactions, financial accounts, subawards, agency spending.","p":"N/A (government open data, no paid tier)","b":"Authoritative free programmatic access to all federal contract/grant award data; cross-cutting baseline for any defense spending analysis.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending Award Data Archive (pre-generated downloads)","u":"https://www.usaspending.gov/download_center/award_data_archive","co":"USAspending","f":"Free/keyless. Monthly/yearly pre-generated CSV archives of contracts and assistance by agency, including DoD.","p":"N/A","b":"Fast bulk historical defense contract files without API calls.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending Bulk Download / Custom Award Data Download API (v2)","u":"https://github.com/fedspendingtransparency/usaspending-api/blob/master/usaspending_api/api_contracts/contracts/v2/bulk_download/awards.md","co":"Fedspendingtransparency","f":"Free/keyless. POST /api/v2/bulk_download/awards/ generates CSV/TSV zipfiles of award data filtered by agency, award type, date range, etc.; also…","p":"N/A","b":"Large-scale extraction of DoD award datasets for offline analysis without paging millions of records.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USAspending Federal Account / Object Class endpoints (File B/C breakdowns)","u":"https://api.usaspending.gov/docs/endpoints","co":"USAspending","f":"Free/keyless. v2 endpoints for federal_account, object_class, program_activity, and DABS submission financial data (TAS-level). Lets you tie DoD obligations…","p":"N/A","b":"Linking DoD spending to specific Treasury appropriation/federal accounts and object classes (procurement vs O&M vs RDT&E) - net-new financial…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending Spending By Award API (v2 search)","u":"https://github.com/fedspendingtransparency/usaspending-api/blob/master/usaspending_api/api_contracts/contracts/v2/search/spending_by_award.md","co":"Fedspendingtransparency","f":"Free/keyless. POST /api/v2/search/spending_by_award/ for prime awards or subawards (set subawards=true). Filter by awarding agency=DoD, PSC, NAICS…","p":"N/A","b":"Granular querying of individual DoD prime/sub awards with rich filters; the workhorse endpoint for defense contract analytics.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"US federal government — APIs, open data & services","count":53,"entries":[{"n":"api.data.gov (shared API gateway + key signup)","u":"https://api.data.gov/","co":"Data.gov","f":"Free. Single API key (or DEMO_KEY) works across all participating agency APIs; default 1,000 req/hour/key. DEMO_KEY has much lower limits (~30/hr, 50/day)…","p":"None (free government service; rate limits raised on request)","b":"One key to unlock 450+ federal APIs across 25 agencies (Regulations.gov, GovInfo, Congress.gov, College Scorecard, NPS, FoodData Central, OpenFEC…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Bureau of Economic Analysis (BEA) API","u":"https://apps.bea.gov/API/docs/","co":"U.S. BEA","f":"Free 36-char key (apps.bea.gov/api/data). NIPA/GDP, Regional, International, Industry datasets + metadata.","p":"None","b":"GDP, personal income, regional and international economic accounts.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Bureau of Labor Statistics (BLS) Public Data API v2","u":"https://www.bls.gov/developers/api_signature_v2.htm","co":"U.S. BLS","f":"Free; v2 requires free registration (up to 50 series, 20 yrs, 500 queries/day). v1 keyless but lower limits. POST JSON.","p":"None","b":"Employment, unemployment, CPI/inflation, wages time series — core labor/economic indicators.","s":"Available","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"Census Bureau Data API (api.census.gov)","u":"https://www.census.gov/data/developers/data-sets.html","co":"U.S. Census Bureau","f":"Free key required for most usage (only a handful of demo queries work keyless). ACS 1/5-year, Decennial, Population Estimates, Economic, Trade, Planning DB…","p":"None","b":"Demographic, economic, and housing statistics down to block-group; the canonical U.S. statistical API.","s":"In use","fr":1,"kl":1,"kr":1,"cf":"h"},{"n":"CMS Open Payments API","u":"https://openpaymentsdata.cms.gov/about/api","co":"Cms","f":"Free, NO key. Both Socrata (/resource/{id}.json) and DKAN datastore (/api/1/datastore/query) endpoints. Industry payments to physicians/teaching hospitals…","p":"None","b":"Drug/device company payments to clinicians — conflict-of-interest transparency data.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"College Scorecard API (Dept. of Education)","u":"https://collegescorecard.ed.gov/data/api-documentation/","co":"U.S. Dept of Education","f":"Free with api.data.gov key (api.data.gov/ed/collegescorecard/v1/schools). Institution + field-of-study data: costs, earnings, graduation, admissions.","p":"None","b":"Higher-ed outcomes and cost data by school/program — rich, well-documented federal education API.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Congress.gov API v3 (Library of Congress)","u":"https://api.congress.gov/","co":"Library of Congress","f":"Free with api.data.gov key. Bills, amendments, members, committees, roll-call votes, summaries, text versions; XML/JSON.","p":"None","b":"Legislative data — bills, sponsors, votes, members; official LOC source replacing third-party Congress APIs.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Data.gov Catalog API (GSA)","u":"https://open.gsa.gov/api/datadotgov/","co":"U.S. GSA","f":"Free api.data.gov key (api.gsa.gov/technology/datagov/v3; X-Api-Key; DEMO_KEY 30/hr). Metadata-only catalog of federal datasets; package/resource search.…","p":"None","b":"Discovering datasets across all of government by keyword/org/tag; the master federal data index (metadata, not the data itself).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Data.gov Catalog API v4 (GSA, replaces CKAN)","u":"https://open.gsa.gov/api/datadotgov/","co":"U.S. GSA","f":"Free api.data.gov key (api.gsa.gov/technology/datagov/v4/; 1,000 req/hr personal key, DEMO_KEY much lower). Replaces the previous CKAN-based API. Metadata…","p":"None","b":"Discovering datasets across all of government by keyword/org/tag; the master federal data index (metadata, not the data itself).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Department of Labor Open Data Portal API v4","u":"https://dataportal.dol.gov/","co":"U.S. DOL","f":"Free key (get at dataportal.dol.gov/api-keys; up to 5 keys; base apiprod.dol.gov/v4). 200+ datasets (UI claims, OFCCP, OSHA, wage, Women's Bureau, etc.).…","p":"None","b":"Labor enforcement, unemployment-insurance claims, wage and workforce datasets via the modernized DOL API.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"DOT Open Data Portal (data.transportation.gov, Socrata/SODA)","u":"https://data.transportation.gov/","co":"Transportation","f":"Free; SODA app token recommended (not required) for higher throughput. NHTSA, FMCSA, PHMSA, FRA, FTA, MARAD, BTS datasets.","p":"None","b":"Transportation datasets (crashes, carriers, pipelines, transit) via standardized Socrata SODA API.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EIA Open Data API v2 (Energy Information Admin.)","u":"https://www.eia.gov/opendata/documentation.php","co":"U.S. EIA","f":"Free key. Electricity, petroleum, natural gas, coal, renewables; thousands of energy series with rich faceting.","p":"None","b":"U.S. energy production/consumption/prices time series — the authoritative energy data API.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Federal Real Property Profile (FRPP) Public Dataset","u":"https://www.gsa.gov/policy-regulations/policy/real-property-policy-division-overview/asset-management/federal-real-property-profile/federal-real-property-public-data-set","co":"U.S. GSA","f":"Free bulk dataset (CSV) via GSA + data.gov; FY2016–FY2024. Civilian executive-branch real property assets (buildings/land). No live REST API — annual file…","p":"None","b":"Government-wide inventory of federally owned/leased buildings and land (real estate analysis). Bulk file, not a live API.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Federal Register API v1 (federalregister.gov)","u":"https://www.federalregister.gov/developers/documentation/api/v1","co":"Federal Register","f":"Fully free, NO key. All FR contents since 1994: rules, proposed rules, notices, Executive Orders, Public Inspection docs; HTML/PDF/text links, full-text search.","p":"None","b":"Keyless access to the daily Federal Register and Executive Orders; agencies, documents, public-inspection feed.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FPDS ATOM Feed (legacy, sunsetting)","u":"https://sam.gov/fpds","co":"SAM.gov","f":"Free, no key (SOAP/XML ATOM). Full retirement scheduled July 31, 2026; superseded by SAM.gov Contract Awards API.","p":"None","b":"Legacy integrations still pulling FPDS contract data; migrate to SAM.gov Contract Awards API before July 31, 2026.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GovInfo API (GPO)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Free with api.data.gov key. Bills, BILLSTATUS, Federal Register, CFR, public laws, congressional reports, Statutes at Large; package/granule JSON + bulk…","p":"None","b":"Authoritative full-text federal documents (bills, laws, CFR, hearings) with rich metadata and related-document service.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Grants.gov Search2 REST API","u":"https://www.grants.gov/api/api-guide","co":"Grants.gov","f":"Free, NO key for public search (POST https://api.grants.gov/v1/api/search2; docs explicitly state auth not required for search2). Search funding…","p":"S2S applicant/grantor integration requires registration/certificates (still free)","b":"Keyless search of open federal grant/funding opportunities; complements USAspending (which is awarded grants).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GSA Analytics (analytics.usa.gov / DAP) API","u":"https://open.gsa.gov/api/dap/","co":"U.S. GSA","f":"Free api.data.gov key required (api.gsa.gov/analytics/dap; x-api-key header; DEMO_KEY for testing). Digital Analytics Program traffic data across…","p":"None","b":"Government-wide web traffic / device / browser analytics for .gov sites.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GSA CALC+ Quick Rate API (labor category rates)","u":"https://open.gsa.gov/api/dx-calc-api/","co":"U.S. GSA","f":"Free, NO key/auth (api.gsa.gov/acquisition/calc/v3/api/ceilingrates/; refreshed nightly). Contract-Awarded Labor Category hourly ceiling-rate data from GSA…","p":"None","b":"Benchmarking labor rates for government-contract pricing / services market research.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GSA IT Collect Public API","u":"https://open.gsa.gov/api/itcollect/","co":"U.S. GSA","f":"Free but API KEY REQUIRED (sign up via api.gsa.gov). Historical government-wide IT portfolio/investment data from itdashboard.gov. NOTE: agencies no longer…","p":"None","b":"Federal IT portfolio/investment data for gov-tech spend analysis (historical; reporting wound down).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GSA IT Collect Public API (IT Dashboard data)","u":"https://open.gsa.gov/api/itcollect/","co":"U.S. GSA","f":"Free api.data.gov key required. Historical government-wide IT Portfolio Management data (itdashboard.gov). Note: agencies are no longer required to report…","p":"None","b":"Federal IT portfolio/investment data for gov-tech spend analysis.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GSA Per Diem API","u":"https://open.gsa.gov/api/perdiem/","co":"U.S. GSA","f":"Free key (api.gsa.gov/travel/perdiem/v2; 1,000 req/hr). Lodging + M&IE rates by city/state/ZIP, CONUS standard, ZIP-to-DID, monthly/seasonal.","p":"None","b":"Official federal travel per-diem (lodging & meals) rates — useful for any travel/expense tooling.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GSA Site Scanning API","u":"https://open.gsa.gov/api/site-scanning-api/","co":"U.S. GSA","f":"Free key/DEMO_KEY (api.gsa.gov/technology/site-scanning/v1/websites). Daily scans + analysis of all federal .gov websites.","p":"None","b":"Comprehensive inventory and tech/compliance analysis of US federal government websites.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"ITA Consolidated Screening List (CSL) API (Commerce)","u":"https://api.trade.gov/console/","co":"Trade","f":"Free with api.data.gov key. Single endpoint combining 11+ federal denied/restricted party lists (OFAC SDN, BIS Entity List, State debarred, etc.) with fuzzy…","p":"None","b":"One-call export-compliance screening across all major US restricted-party lists.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"National Park Service API (developer.nps.gov)","u":"https://www.nps.gov/subjects/developer/api-documentation.htm","co":"Nps","f":"Free 40-char key (developer.nps.gov/api/v1). Parks, alerts, events, campgrounds, visitor centers, things-to-do, articles, multimedia.","p":"None","b":"Rich authoritative content for all national parks — great for travel/outdoor apps.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"National Weather Service API (api.weather.gov)","u":"https://www.weather.gov/documentation/services-web-api","co":"NWS (NOAA)","f":"Fully free, NO key (User-Agent header requested). Forecasts, observations, active alerts (CAP), aviation products; GeoJSON. OpenAPI at…","p":"None","b":"Keyless real-time weather forecasts and severe-weather alerts by lat/lon or zone; highest-value keyless federal API.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NHTSA Recalls, Complaints & Safety Ratings API","u":"https://www.nhtsa.gov/nhtsa-datasets-and-apis","co":"U.S. NHTSA","f":"Fully free, NO key (base api.nhtsa.gov). Recalls by campaign/make-model-year, ODI owner complaints, NCAP 5-Star Safety Ratings; JSON. Separate from vPIC.","p":"None","b":"Keyless vehicle safety data: recalls, consumer complaints, and crash-test safety ratings.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NHTSA vPIC API (VIN decode, DOT)","u":"https://vpic.nhtsa.dot.gov/api/","co":"U.S. DOT","f":"Fully free, NO key (automated rate-limiting). VIN decode (make/model/year + 100+ attrs), manufacturer and equipment data; XML (default)/CSV/JSON. NOTE…","p":"None","b":"Keyless VIN decoding and vehicle specification lookups.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NHTSA vPIC API (VIN decoding) — DOT","u":"https://vpic.nhtsa.dot.gov/api/","co":"U.S. DOT","f":"Fully free, NO key. VIN decode (make/model/year + 100+ attributes), manufacturer/make/model lookups, Canadian specs; JSON/XML/CSV.","p":"None","b":"Keyless VIN decoding and vehicle product specs. NOTE: recalls, complaints, and safety ratings are SEPARATE keyless APIs at api.nhtsa.gov (not on…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NOAA Climate Data Online (CDO) Web Services v2","u":"https://www.ncdc.noaa.gov/cdo-web/webservices/v2","co":"NOAA","f":"Free token (request at ncdc.noaa.gov/cdo-web/token; 5 req/sec, 10,000 req/day). Base ncei.noaa.gov/cdo-web/api/v2; daily/monthly summaries, normals, GHCN…","p":"None","b":"Historical climate/weather observations (temperature, precipitation, normals) by station — complements the real-time NWS API.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"OFAC Sanctions List Service (SDN + Consolidated)","u":"https://ofac.treasury.gov/sanctions-list-service","co":"U.S. Treasury","f":"Free, NO key. RESTful Sanctions List Service for syncing the SDN List and Consolidated Sanctions List; XML/CSV/JSON file delivery (bulk sync, not a built-in…","p":"None","b":"Automating sync of US sanctions / denied-party lists for compliance and entity screening.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenFEC API (Federal Election Commission)","u":"https://api.open.fec.gov/developers/","co":"Fec","f":"Free with api.data.gov key (DEMO_KEY allowed). Candidates, committees, filings, Schedule A/B itemized contributions/disbursements; nightly updates + bulk.","p":"None","b":"Campaign finance — who funds whom; deep itemized contribution/expenditure data.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Regulations.gov API v4 (eRulemaking)","u":"https://open.gsa.gov/api/regulationsgov/","co":"U.S. GSA","f":"Free with api.data.gov key (1,000 req/hr). Search/retrieve documents, dockets, comments; POST to submit public comments.","p":"None","b":"Reading and submitting public comments on federal rulemaking; dockets and supporting documents across agencies.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"resources.data.gov Catalog API","u":"https://resources.data.gov/catalog-api/","co":"Data.gov","f":"Free; an api.data.gov key is required for the current Catalog API (DEMO_KEY for exploration). Federal data inventory / data.json harvesting reference.…","p":"None","b":"Programmatic federal data inventory / data.json harvesting reference (largely the same service as the GSA Data.gov Catalog API).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"resources.data.gov Catalog API guidance","u":"https://resources.data.gov/catalog-api/","co":"Data.gov","f":"Free reference. CKAN/data.json catalog access guidance for the federal data inventory; current live catalog API is api.gsa.gov/technology/datagov/v4 (see…","p":"None","b":"Programmatic federal data inventory / data.json harvesting reference and policy guidance.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"SAM.gov Assistance Listings API (CFDA)","u":"https://open.gsa.gov/api/assistance-listings-api/","co":"U.S. GSA","f":"Free key. Federal assistance listings (formerly CFDA programs) and ALN metadata.","p":"None","b":"Catalog of Federal Domestic Assistance programs (ALN/CFDA) for grant program lookups.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Contract Awards API (FPDS successor)","u":"https://open.gsa.gov/api/contract-awards/","co":"U.S. GSA","f":"Free api.data.gov key. RESTful replacement for the FPDS ATOM feed; base api.sam.gov/contract-awards/v1/search. FPDS.gov public site decommissioned Feb 24…","p":"None","b":"Procurement contract-award records (FPDS data) via modern REST; use instead of the retiring FPDS ATOM feed.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Entity Management API","u":"https://open.gsa.gov/api/entity-api/","co":"U.S. GSA","f":"Free key (api.sam.gov v4). Entity registration details (UEI/CAGE), public entity data; non-public/FOUO requires roles/system account.","p":"None","b":"Look up federal contractor/grantee registrations (UEI, CAGE, business types) — core vendor due-diligence data.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Exclusions API (debarment)","u":"https://open.gsa.gov/api/exclusions-api/","co":"U.S. GSA","f":"Free key (api.sam.gov/entity-information/v4/exclusions). Search debarred/excluded parties by name, classification, exclusion type.","p":"None","b":"Screening for suspended/debarred entities and individuals barred from federal awards (compliance/sanctions screening).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Federal Hierarchy Public API","u":"https://open.gsa.gov/api/fh-public-api/","co":"U.S. GSA","f":"Free key. Federal organizational hierarchy (departments, sub-agencies, offices) with codes.","p":"None","b":"Resolving federal agency/office codes and org structure for joining procurement and spending data.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Get Opportunities Public API","u":"https://open.gsa.gov/api/get-opportunities-public-api/","co":"U.S. GSA","f":"Free public key (api.sam.gov/prod/opportunities/v2/search). Published contract opportunities (solicitations, notices) by date, type, agency.","p":"None (system accounts for bulk/non-public)","b":"Tracking active federal contracting opportunities / RFPs (the former FedBizOpps/FBO data).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Product & Service Codes (PSC) API","u":"https://open.gsa.gov/api/PSC-Public-API/","co":"U.S. GSA","f":"Free key. Product Service Codes used to classify what the government buys.","p":"None","b":"Decoding/validating PSC codes in contract data.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SAM.gov Subaward Reporting APIs (FSRS)","u":"https://open.gsa.gov/api/acquisition-subaward-reporting-api/","co":"U.S. GSA","f":"Free key. Acquisition and assistance subaward reporting data (sub-tier contracts/grants); bulk-upload variants available.","p":"None","b":"Following federal money to subcontractors/subgrantees (the FSRS subaward layer).","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Search.gov (SearchGov) Results & Clicks APIs","u":"https://open.gsa.gov/api/searchgov-results/","co":"U.S. GSA","f":"Free (account-based; affiliate handle + access_key auto-generated; ~1,000 req/hr). Hosted search results and click analytics for federal websites.","p":"None","b":"Adding government-grade site search to .gov properties and pulling search analytics.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Search.gov (SearchGov) Results API","u":"https://open.gsa.gov/api/searchgov-results/","co":"U.S. GSA","f":"Free but account-based: requires affiliate + access_key (from the Search.gov Admin Center). Endpoint api.gsa.gov/technology/searchgov/v2/results/i14y; 1,000…","p":"None","b":"Adding government-grade site search to .gov properties and pulling search analytics.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Treasury Fiscal Data API","u":"https://fiscaldata.treasury.gov/api-documentation/","co":"U.S. Treasury","f":"Fully free, NO key. Debt to the Penny, MSPD, interest rates, exchange rates, Treasury statements; JSON/XML/CSV; base api.fiscaldata.treasury.gov.","p":"None","b":"Keyless U.S. national debt, fiscal/financial datasets; daily debt outstanding, rates, statements.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USAspending.gov API v2","u":"https://api.usaspending.gov/","co":"USAspending","f":"Fully free, NO key. Awards (contracts, grants, loans, direct payments, IDVs), transactions, account-level data, agency/geographic breakdowns, bulk downloads.","p":"None","b":"Authoritative federal spending/award data — the deepest keyless source for contracts and grants by recipient, agency, place.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USDA ERS ARMS Data API (Economic Research Service)","u":"https://www.ers.usda.gov/developer/data-apis","co":"U.S. USDA","f":"Free key (register by email). Primary live API is the ARMS (Agricultural Resource Management Survey) farm finance API; other ERS datasets are mostly downloads.","p":"None","b":"Agricultural economics data (farm income/finance via ARMS) beyond NASS.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA ERS Data APIs (Economic Research Service)","u":"https://www.ers.usda.gov/developer/data-apis","co":"U.S. USDA","f":"Free key (register with name/email). ARMS farm finance API confirmed; other datasets vary. Food prices, international ag productivity referenced.","p":"None","b":"Agricultural economics datasets (ARMS farm income, food prices) beyond NASS.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA FoodData Central API","u":"https://fdc.nal.usda.gov/api-guide/","co":"U.S. USDA","f":"Free with api.data.gov key (api.nal.usda.gov/fdc/v1; 1,000 req/hr; DEMO_KEY 30/hr). Food search + nutrient details.","p":"None","b":"Nutrition/nutrient data for foods — the standard US food composition API.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USDA NASS Quick Stats API","u":"https://quickstats.nass.usda.gov/api","co":"U.S. USDA","f":"Free key. Agricultural statistics from surveys and the Census of Agriculture; JSON/XML/CSV; what/where/when params.","p":"None","b":"Crop/livestock production, prices, acreage at national/state/county level.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"USGS Earthquake Catalog API (FDSN / GeoJSON feeds)","u":"https://earthquake.usgs.gov/fdsnws/event/1/","co":"USGS","f":"Fully free, NO key. FDSN event query (earthquake.usgs.gov/fdsnws/event/1/query) with GeoJSON/CSV/XML/KML/QuakeML; plus pre-built real-time GeoJSON feeds…","p":"None","b":"Keyless real-time and historical earthquake data by location/time/magnitude — the authoritative seismic feed.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USPS APIs Developer Portal (v3)","u":"https://developers.usps.com/apis","co":"Usps","f":"Free with account/OAuth (Addresses 3.0 validation/standardization, ZIP/city-state lookup, tracking, prices, labels). Legacy Web Tools retired — migrate to…","p":"Some shipping/label services require a business account/terms","b":"USPS address validation/standardization and package tracking via the modern API platform.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"}]},{"category":"US legislative, regulatory & judicial data","count":34,"entries":[{"n":"Caselaw Access Project (Harvard) — bulk data","u":"https://case.law/","co":"Case","f":"Free, keyless bulk download. ~6.7M cases / 360 years of U.S. case law from Harvard Law digitization. NOTE: the api.case.law REST API and native search were…","p":"None (free)","b":"Bulk corpus of historical U.S. case law for NLP/research. For a live API use CourtListener (which ingested all CAP cases); CAP itself is now…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Congress.gov API","u":"https://api.congress.gov/","co":"Library of Congress","f":"Free with API key (api.data.gov). 5,000 requests/hour. JSON/XML. Bills, amendments, members, committees, nominations, treaties, Congressional Record, CRS…","p":"None (free government API)","b":"The authoritative, official source for U.S. federal legislative data: bills, laws, members, committees, nominations, treaties, and CRS reports. The…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"CourtListener Financial Disclosures API","u":"https://www.courtlistener.com/help/api/rest/financial-disclosures/","co":"Courtlistener","f":"Free with CourtListener token. Tens of thousands of judicial financial-disclosure records with ~2M individual investments for current/former federal judges…","p":"Membership/commercial agreements for higher limits.","b":"Federal judges' financial disclosures and conflict-of-interest analysis (basis of the WSJ judicial-conflicts investigation). Niche but unique…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CourtListener RECAP APIs (PACER data)","u":"https://www.courtlistener.com/help/api/rest/recap/","co":"Courtlistener","f":"Free with token (same CourtListener limits). ~500 million PACER items: dockets, docket entries, documents, parties, attorneys, from the crowdsourced RECAP…","p":"Membership/commercial agreements lift limits; recap-fetch pulls live from PACER (PACER…","b":"Free access to federal PACER court dockets and filings via the crowdsourced RECAP Archive, avoiding most PACER fees for already-archived documents.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CourtListener REST API v4 (Free Law Project)","u":"https://www.courtlistener.com/help/api/rest/v4/","co":"Courtlistener","f":"Free with token (now v4.4): 5 req/min, 50/hour, 125/day (anonymous lower). Case law (all CAP cases ingested), judges, oral-argument audio, citations…","p":"Free Law Project membership (donation/membership tiers) and commercial agreements lift…","b":"The single richest free legal-data API: federal + state case law, judges, oral arguments, citation graph, and PACER/RECAP integration. Best free…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"CRS Reports — Congress.gov & EveryCRSReport","u":"https://www.everycrsreport.com/","co":"Everycrsreport","f":"EveryCRSReport: free, keyless bulk/JSON listing of 23,000+ CRS reports + PDFs/HTML. Official: crsreports.congress.gov and the Congress.gov API expose CRS…","p":"None (free)","b":"Nonpartisan Congressional Research Service analytical reports. EveryCRSReport is the easiest keyless bulk source; Congress.gov API is the official…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"eCFR API (Electronic Code of Federal Regulations)","u":"https://www.ecfr.gov/developers/documentation/api/v1","co":"Ecfr","f":"Free, NO key required. JSON/XML. Versioner (point-in-time CFR content + structure), Admin (agencies, corrections), Search service with historical full-text.…","p":"None (free, keyless)","b":"Programmatic, point-in-time access to the full Code of Federal Regulations with structure, version history, and search. Best for current/historical…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"FARA eFile API (DOJ Foreign Agents Registration)","u":"https://efile.fara.gov/api","co":"Fara","f":"Free, keyless (rate-limited). JSON access to FARA filings: registrations (primary registrants), short-forms (individual foreign agents), and foreign…","p":"None (free government data)","b":"Foreign-agent / foreign-influence disclosures filed with DOJ. Unique dataset for tracking foreign lobbying, distinct from domestic LDA lobbying data.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Federal Register API","u":"https://www.federalregister.gov/developers/documentation/api/v1","co":"Federal Register","f":"Free, NO key required. JSON/CSV. Rules, proposed rules, notices, presidential documents (1994-present), agencies, public-inspection docs. Keyless, generous…","p":"None (free, keyless)","b":"Keyless, real-time access to the daily Federal Register: proposed/final rules, notices, executive orders, and agency metadata. Easiest keyless…","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FollowTheMoney.org API (state campaign finance)","u":"https://www.followthemoney.org/our-data/apis","co":"Followthemoney","f":"Free with a myFollowTheMoney account (key from the account export icons). State-level campaign-finance contributions/independent expenditures across all 50…","p":"None for standard API use (free with account); custom data services on request.","b":"Comprehensive state-level campaign-finance data (contributions to state candidates/committees/ballot measures) unified across 50 states — the state…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"GAO Reports (via GovInfo collection)","u":"https://www.govinfo.gov/app/collection/gaoreports","co":"GPO","f":"Free via GovInfo API (api.data.gov key) — GAO has no standalone public REST API. GAO Reports & Comptroller General decisions collection (GAOREPORTS)…","p":"None (free government data)","b":"Government Accountability Office oversight reports and Comptroller General decisions; access programmatically through the GovInfo GAOREPORTS…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GovInfo API (GPO)","u":"https://api.govinfo.gov/docs/","co":"GPO","f":"Free with api.data.gov key (DEMO_KEY for testing). Collections, Packages, Search, Related-Documents services. Covers all three branches: Federal Register…","p":"None (free government API)","b":"Deep full-text + authenticated PDF/XML access to official publications across all three branches of government. Best for keyed bulk document…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"GovInfo Bill Status (BILLSTATUS) Bulk XML","u":"https://github.com/usgpo/bill-status","co":"Usgpo","f":"Free, keyless. BILLSTATUS XML from govinfo.gov/bulkdata/BILLSTATUS, updated every ~4 hours for the current Congress, covering 113th Congress (2013) forward.…","p":"None (free, public domain)","b":"Frequently-refreshed, machine-readable status/metadata for every federal bill (sponsors, actions, subjects, related bills) — the canonical bulk…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GovInfo Bulk Data Repository (GPO)","u":"https://www.govinfo.gov/bulkdata/","co":"GPO","f":"Free, NO key required. XML/JSON listings (append /xml or /json to any bulkdata path). Bill Status, Bills, CFR, Federal Register, US Courts opinions…","p":"None (free, keyless)","b":"Keyless bulk retrieval of official GPO/Congress documents as XML/JSON ZIP archives — the no-auth complement to the keyed GovInfo API for pipeline…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"GovTrack.us (bulk data / scraping)","u":"https://www.govtrack.us/about-our-data","co":"Govtrack","f":"Website free; NOTE: GovTrack's public API and bulk data were DISCONTINUED in summer 2017. Now points users to Congress.gov API / unitedstates/congress.…","p":"None","b":"Historical legislative analysis and member scorecards via the website; for programmatic access use Congress.gov API instead since GovTrack's API is…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GovTrack.us (website + historical analysis; API retired)","u":"https://www.govtrack.us/about-our-data","co":"Govtrack","f":"Website free. NOTE: GovTrack's public API and bulk data were DISCONTINUED in 2017 (it now points users to the Congress.gov API / unitedstates/congress).…","p":"None","b":"Historical legislative analysis and member scorecards via the website; for programmatic access use the Congress.gov API instead, since GovTrack's…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"House Clerk / Senate Roll-Call Vote XML feeds","u":"https://clerk.house.gov/Votes","co":"House","f":"Free, keyless XML. Per-vote roll-call XML at clerk.house.gov/evs/{year}/roll{NNN}.xml and senate.gov vote menus, with member-level positions; documented…","p":"None (free government data)","b":"Authoritative member-level roll-call vote XML straight from the chambers (faster than API for fresh votes). Best primary source for vote tallies…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LegiScan API","u":"https://legiscan.com/legiscan","co":"Legiscan","f":"Free Public Pull tier with API key (free LegiScan account): 30,000 queries/month. JSON. Bill detail/history, full texts, roll calls, sponsors across 50…","p":"Paid Pull subscription (100k-250k queries/mo) and Push API subscription (real-time…","b":"Mature (20+ yr) 50-state + Congress bill tracking with full texts and roll calls; the Push tier is best for real-time legislative monitoring at scale.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Open States API v3 (Plural Policy)","u":"https://docs.openstates.org/api-v3/","co":"Openstates","f":"Free with API key (X-API-KEY header or ?apikey). Bills/resolutions, votes, legislators & officials, committees, events across 50 states + DC + PR (+ limited…","p":"Plural Policy offers commercial/enterprise tiers for higher limits and premium features.","b":"Standardized state-legislature data (bills, votes, legislators) across all 50 states + DC + PR. The go-to open API for state legislative tracking.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenFEC API (Federal Election Commission)","u":"https://api.open.fec.gov/developers/","co":"Fec","f":"Free with api.data.gov key (DEMO_KEY for testing). RESTful, nightly updates. Candidates, committees, filings, Schedule A (receipts), Schedule B…","p":"None (free government API)","b":"The authoritative source for federal campaign-finance data: candidate/committee filings, contributions, and disbursements. The definitive…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"OpenSecrets API (campaign finance & lobbying)","u":"https://www.opensecrets.org/open-data/api","co":"Opensecrets","f":"Free with API key (registration required). JSON/XML. Candidate summaries, contributor profiles, industry/PAC data, lobbying, member personal finances. Bulk…","p":"Bulk data / custom data agreements for heavy commercial use.","b":"Curated, analysis-ready money-in-politics data (industry classifications, donor profiles, member finances) layered on top of raw FEC filings.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Oyez API (Supreme Court oral arguments)","u":"https://api.oyez.org/cases","co":"Oyez","f":"Free, keyless unofficial JSON API at api.oyez.org/cases and api.oyez.org/cases/{term}/{docket}. Transcript-synced oral-argument audio, speaker IDs, case…","p":"None (free; unofficial/undocumented)","b":"Supreme Court oral-argument audio + synchronized transcripts and plain-English case summaries. Unique multimedia SCOTUS source; treat as…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"PACER Case Locator (PCL) API","u":"https://pacer.uscourts.gov/help/pacer/pacer-case-locator-pcl-api-user-guide","co":"Uscourts","f":"No practical free tier. Requires a PACER account + auth token. REST, JSON/XML search of the national federal case index.","p":"PACER usage fees ($0.10/page, capped at $3.00/document; quarterly bills $30 or under…","b":"The official federal judiciary index for locating cases/parties across all U.S. district, bankruptcy, and appellate courts. Authoritative but…","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"ProPublica Congress API (retired)","u":"https://projects.propublica.org/api-docs/congress-api/","co":"Propublica","f":"RETIRED — new API keys are NOT issued; docs are historical reference only. Formerly covered members, votes, bills, nominations, statements (originated at NYT…","p":"None (discontinued)","b":"Historical reference for data schemas; for live data migrate to Congress.gov API. Listed for context since many older integrations referenced it.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"ProPublica Nonprofit Explorer API v2","u":"https://projects.propublica.org/nonprofits/api","co":"Propublica","f":"Free, keyless. JSON. Form 990/990-EZ/990-PF filings since 2013, organization profiles by EIN, full-text search, links to 990 PDFs and structured financial…","p":"None (free, with Data Terms of Use)","b":"IRS Form 990 nonprofit financials — useful for tracking 501(c)(4) dark-money groups, trade associations, and PACs' parent orgs alongside…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"RegInfo.gov (OIRA Unified Agenda & reg review)","u":"https://www.reginfo.gov/public/","co":"Reginfo","f":"Free, keyless. Agenda XML Reports and EO XML Reports bulk downloads (no formal REST API). Unified Agenda of Regulatory & Deregulatory Actions, Regulatory…","p":"None (free government data)","b":"Upstream regulatory pipeline: pending rules under OMB/OIRA review and agencies' forward-looking Unified Agenda — earlier signal than the Federal…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Regulations.gov API v4","u":"https://open.gsa.gov/api/regulationsgov/","co":"U.S. GSA","f":"Free with api.data.gov key (DEMO_KEY for testing). Read-only GET for /documents, /comments, /dockets covering full federal rulemaking dockets + public…","p":"None (free government API)","b":"Federal rulemaking dockets, supporting documents, and the full corpus of public comments. The source for comment-period analysis and docket tracking.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Senate LDA Lobbying Disclosure API (migrating to LDA.gov)","u":"https://lda.senate.gov/api/redoc/v1/","co":"Senate","f":"Free; register for API key (anonymous allowed at lower limits). REST/JSON. LD-1 registrations, LD-2 quarterly activity reports, LD-203 contributions. NOTE…","p":"None (free government API)","b":"Official federal lobbying disclosure filings (registrations, quarterly activity, contributions). The primary-source lobbying dataset, far richer…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Supreme Court of the U.S. (opinions / orders feeds)","u":"https://www.supremecourt.gov/opinions/opinions.aspx","co":"Supremecourt","f":"Free, keyless. No formal JSON API, but slip opinions, orders, argument calendars, transcripts, and merits-stage data published as PDFs + structured pages…","p":"None (free government site)","b":"Primary-source SCOTUS slip opinions, orders, and argument transcripts straight from the Court; pair with CourtListener/GovInfo for machine-readable…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"U.S. Code XML/bulk (Office of the Law Revision Counsel)","u":"https://uscode.house.gov/download/download.shtml","co":"House","f":"Free, keyless bulk download. Full United States Code in USLM XML, XHTML, PCC, and PDF; individual titles or the whole Code, updated continuously to the…","p":"None (free government data)","b":"Authoritative machine-readable U.S. statutory code (USLM XML) for parsing federal statutes and building citators. The primary source for codified…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"U.S. Courts Federal Judicial Caseload Statistics","u":"https://www.uscourts.gov/statistics-reports/caseload-statistics-data-tables","co":"Uscourts","f":"Free, keyless. Downloadable data tables (Excel/PDF; no REST API) on appellate/district/bankruptcy caseloads, federal probation & pretrial services, judicial…","p":"None (free government data)","b":"Official aggregate statistics on federal court workloads and caseloads. Best for judiciary-wide trend analysis (no per-case API; use PACER/RECAP…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"unitedstates/congress (data scrapers)","u":"https://github.com/unitedstates/congress","co":"Unitedstates","f":"Free, keyless, CC0. Python scrapers producing structured JSON/XML for bills, amendments, House/Senate votes, committee meetings, and presidential…","p":"None (public domain)","b":"Self-hosted, customizable bulk collection of congressional bills/votes/amendments/nominations when you need full control over the pipeline rather…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"unitedstates/congress-legislators (GitHub bulk)","u":"https://github.com/unitedstates/congress-legislators","co":"Unitedstates","f":"Free, keyless, CC0 public domain. YAML/JSON/CSV bulk files: every member of Congress 1789-present, committees (1973+), committee memberships, social media…","p":"None (public domain)","b":"The standard public-domain crosswalk of legislator identifiers and biographies (Bioguide, ICPSR, FEC, GovTrack, OpenSecrets, VoteSmart, Wikipedia…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Voteview (UCLA) — Roll Calls & DW-NOMINATE","u":"https://voteview.com/data","co":"Voteview","f":"Free, keyless. CSV/JSON bulk downloads + Rvoteview R package. Every congressional roll-call vote 1789-present (live-updated), member ideology (DW-NOMINATE…","p":"None (free academic resource)","b":"Historical and current roll-call votes plus DW-NOMINATE ideology scores back to 1789. The canonical dataset for congressional ideology/polarization…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"}]},{"category":"US military physical assets, force structure & space","count":53,"entries":[{"n":"ADS-B Exchange API (military flag)","u":"https://www.adsbexchange.com/version-2-api/","co":"Adsbexchange","f":"No free tier on the official live API. (adsbexchange.com/api-lite exists for self-feeders; historical bulk samples exist.)","p":"Paid via RapidAPI (adsbexchange-com1) from ~$10/mo (e.g. ~10k req), and Enterprise API…","b":"The premier unfiltered military aircraft tracking source — explicitly flags military/interesting/PIA/LADD aircraft (no filtering of mil flights).","s":"In use","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"BTS / NTAD Military Bases (USDOT ArcGIS MapServer)","u":"https://maps.bts.dot.gov/services/rest/services/NTAD/MilitaryBases/MapServer","co":"U.S. DOT","f":"Free, keyless ArcGIS MapServer (National Transportation Atlas Database, layer 0 = Military Bases). Bulk download as File…","p":"None.","b":"Transportation-context DoD installation/base point+boundary polygons from NTAD (per Base Structure Report). CORRECTION: keyless REST endpoint is…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"BTS / NTAD Military Bases (USDOT ArcGIS REST)","u":"https://maps.bts.dot.gov/services/rest/services/NTAD/MilitaryBases/MapServer/0","co":"U.S. DOT","f":"Free, keyless ArcGIS MapServer (National Transportation Atlas Database, Military Bases layer 0). Also bulk download (File GDB/Shapefile/GeoJSON/CSV/KML) and…","p":"None.","b":"Transportation-context military base polygons from the National Transportation Atlas Database.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CelesTrak GP (General Perturbations) Data API","u":"https://celestrak.org/NORAD/documentation/gp-data-formats.php","co":"CelesTrak","f":"Fully free, keyless. Base: https://celestrak.org/NORAD/elements/gp.php?CATNR=25544&FORMAT=TLE. Query by CATNR, INTDES, GROUP, NAME, SPECIAL. Formats…","p":"None; donation-supported nonprofit.","b":"Keyless current orbital element sets (TLEs/OMM) for all tracked satellites including military/USSF assets; the canonical free TLE source.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CelesTrak SATCAT (Satellite Catalog) API","u":"https://celestrak.org/satcat/satcat-format.php","co":"CelesTrak","f":"Free, keyless. Query endpoint https://celestrak.org/satcat/records.php?{QUERY}=VALUE with filters PAYLOADS, ONORBIT, ACTIVE, MAX; query types…","p":"None.","b":"Metadata catalog of all cataloged space objects (payloads, debris, rocket bodies) with ownership/country, complementing raw TLEs. VERIFIED…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CelesTrak SATCAT (Satellite Catalog) Query API","u":"https://celestrak.org/satcat/satcat-format.php","co":"CelesTrak","f":"Free, keyless. Endpoint https://celestrak.org/satcat/records.php?{CATNR|INTDES|GROUP|NAME|SPECIAL}=value with optional flags PAYLOADS, ONORBIT, ACTIVE, MAX…","p":"None.","b":"Metadata catalog of all cataloged space objects (payloads, debris, rocket bodies) with ownership/country, complementing raw TLEs.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"CelesTrak SOCRATES Plus (Conjunction Reports)","u":"https://celestrak.org/SOCRATES/","co":"CelesTrak","f":"Free, keyless. Conjunction-screening reports run 3x/day of active payloads vs full catalog: TCA, minimum range, max probability, relative speed for the…","p":"None.","b":"Open satellite close-approach / collision-risk data for orbital safety analysis of space assets.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Cirium Laminar Data Hub - NOTAM Data API","u":"https://developer.laminardata.aero/documentation/notamdata/v2","co":"Laminardata","f":"Free trial available with a Laminar Hub account/user key (sign up at developer.laminardata.aero). Otherwise subscription.","p":"Commercial subscription (Cirium/LNRS). REST + streaming NOTAM data in AIXM 5.1 Digital…","b":"Enterprise REST/streaming decoded NOTAM feeds (incl. military/special-use airspace) with industry-standard AIXM/GeoJSON; a strong commercial…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"DCAS - Defense Casualty Analysis System (DMDC)","u":"https://dcas.dmdc.osd.mil/dcas/","co":"Osd","f":"Free public query tool + downloadable conflict/casualty datasets (Korea, Vietnam, Gulf, GWOT/OEF/OIF/OND/OIR/OFS); recent-operation figures updated daily…","p":"None.","b":"Authoritative US military casualty statistics by conflict, branch, cause and demographics.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DMDC Statistics & Reports (military personnel / force counts)","u":"https://dwp.dmdc.osd.mil/dwp/app/dod-data-reports/stats-reports","co":"Osd","f":"Free public reports (HTML/PDF/Excel) plus downloadZ file endpoints: active-duty & reserve strength by service/grade/location, demographics. Some reports…","p":"None.","b":"Authoritative US military personnel/manpower and force-strength statistics by service, grade and installation.","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DoD Comptroller Budget Materials / Green Book (force structure & defense budget)","u":"https://comptroller.defense.gov/Budget-Materials/","co":"Defense","f":"Free, keyless PDFs/Excel: National Defense Budget Estimates (Green Book) historical tables, Defense Budget Overview (incl. requested combat force structure)…","p":"None.","b":"Authoritative DoD budget, historical defense spending tables, and force-structure planning figures.","s":"In use","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"DoD RPID / Base Structure Report (real-property footprint)","u":"https://www.acq.osd.mil/eie/imr/rpid/library.html","co":"Osd","f":"Historical Base Structure Reports (real-property inventory: site counts, acreage, building/structure inventory by service and country) are free PDFs via DTIC…","p":"None.","b":"Aggregate DoD real-property/installation footprint (counts, acreage, replacement value) by service and location — historical baselines openly…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"DTN / Boeing NOTAMs API","u":"https://devportal.dtn.com/catalog/Aviation/dtn-notams-api/documentation","co":"Dtn","f":"No free tier; commercial aviation data API (API spec + Postman collection downloadable from the DTN dev portal).","p":"Commercial (contact DTN/Boeing for pricing). Boeing-side NOTAMs API also at…","b":"Enterprise-grade, decoded/structured NOTAM feeds when FAA raw feeds are insufficient (commercial aviation ops).","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"DTN NOTAMs API / Boeing (Jeppesen) NOTAMs API","u":"https://developer.boeing.com/apis/notams-3/","co":"Boeing","f":"No free tier; commercial aviation data APIs.","p":"Two distinct commercial products: (1) DTN NOTAMs API at…","b":"Enterprise-grade decoded/structured NOTAM feeds when FAA raw feeds are insufficient. CLARIFICATION: DTN and Boeing/Jeppesen are separate vendors…","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"FAA 28-Day NASR Subscription (airports incl. military/joint-use airfields)","u":"https://www.faa.gov/air_traffic/flight_info/aeronav/aero_data/NASR_Subscription/","co":"FAA","f":"Free, keyless bulk download every 28 days. Airport, NAVAID, ASOS/AWOS, frequency, airway data in CSV and AIXM 5.0/5.1, with README + legacy TXT-to-CSV…","p":"None.","b":"Authoritative US airfield dataset including military and joint civil-military airports with facility attributes.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"FAA Federal NOTAM System API (FAA API Portal)","u":"https://api.faa.gov/s/","co":"FAA","f":"Free with registration/API key on the FAA API portal (api.faa.gov redirects to portal.apic4e.faa.gov). NOTAM API returns active Notices to Air Missions incl.…","p":"None.","b":"Authoritative real-time NOTAMs incl. military operating areas, restricted/special-use airspace and launch/space-operation notices. CORRECTION: cite…","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FAA Federal NOTAM System API (FAA API Portal, api.faa.gov)","u":"https://api.faa.gov/s/","co":"FAA","f":"Free with registration/API key on the FAA API portal (api.faa.gov). NOTAM API returns active Notices to Air Missions incl. military airspace/special-use…","p":"None.","b":"Authoritative real-time NOTAMs incl. military operating areas, restricted/special-use airspace and launch/space-operation notices.","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"FAA SWIM Federal NOTAM System (FNS) feed + fns-client reference impl","u":"https://github.com/faa-swim/fns-client","co":"Faa swim","f":"Free. The FAA System-Wide Information Management (SWIM) Federal NOTAM System provides a JMS publish/subscribe NOTAM stream plus an FNS Initial Load (FIL) via…","p":"None (FAA SWIM is free; requires SWIM subscription/onboarding).","b":"Authoritative real-time machine NOTAM stream (incl. military/special-use airspace and space ops) for systems needing the raw FAA source rather than…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FPDS-NG Atom Feed (legacy federal procurement)","u":"https://www.fpds.gov/wiki/index.php/ATOM_Feed_FAQ","co":"Fpds","f":"Free, keyless Atom/XML feed of federal contract actions incl. DoD (File D1). BEING RETIRED: public FPDS website/ezSearch decommissioned Feb 24, 2026; the…","p":"None.","b":"Bulk/legacy programmatic pull of detailed federal (incl. defense) contract transactions during the transition window; use SAM.gov API for new work.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GCAT - General Catalog of Artificial Space Objects (Jonathan McDowell)","u":"https://planet4589.org/space/gcat/web/cat/cats.html","co":"Planet4589","f":"Free, keyless bulk download (TSV/tar.gz), e.g. planet4589.org/space/gcat/tsv/derived/currentcat.tsv and the full cats.tar.gz. Includes satcat, auxcat…","p":"None.","b":"Most comprehensive open historical catalog of space objects with rich provenance, launch and organization metadata beyond SATCAT.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GeoNames Gazetteer bulk dump","u":"http://download.geonames.org/export/dump/","co":"Geonames","f":"Free, keyless bulk download (per-country and allCountries TSV) under CC BY. featureCodes_en.txt documents military codes (S.INSM, S.AIRB, S.NVB, etc.).","p":"None for the open dump.","b":"Offline/bulk global place dataset including military facility features for self-hosted geocoding.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GeoNames Web Services API (military feature codes)","u":"https://www.geonames.org/export/web-services.html","co":"Geonames","f":"Free with username registration (no paid key). 40+ REST services (search, findNearby, get, reverse geocoding) supporting feature codes incl. S.INSM (military…","p":"Premium commercial subscription (SLA) with higher limits (e.g. 160km radius / 2500…","b":"Global gazetteer lookup of military installations, airbases and naval bases by name/coordinates with feature-code filtering.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Heavens-Above (satellite pass predictions)","u":"https://www.heavens-above.com/","co":"Heavens above","f":"Free, keyless website for satellite/ISS/Tiangong/Starlink pass predictions and orbit data by observer location. No official public REST API (HTML, scrapable).","p":"None (donation-supported).","b":"Human-readable satellite visibility/pass predictions; complements TLE APIs for observation planning. VERIFIED: free, website-only, no official API.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HIFLD / MIRTA - Military Installations, Ranges & Training Areas (ArcGIS FeatureServer)","u":"https://services7.arcgis.com/n1YM8pTrFmm7L4hs/arcgis/rest/services/mirta/FeatureServer","co":"Arcgis","f":"Free, keyless ArcGIS FeatureServer. Two layers: (0) DoD Sites - Point, (1) DoD Sites - Boundary. Query output JSON, max 1000 records/page. Publicly…","p":"None.","b":"Authoritative DoD installation/range/training-area locations and boundaries for mapping US military physical footprint. VERIFIED: 2 layers, JSON…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"HIFLD / MIRTA - Military Installations, Ranges & Training Areas (GeoServices REST)","u":"https://services.arcgis.com/xOi1kZaI0eWDREZv/arcgis/rest/services/NTAD_Military_Bases/FeatureServer","co":"Data.gov","f":"Free, keyless ArcGIS FeatureServer: https://services7.arcgis.com/n1YM8pTrFmm7L4hs/arcgis/rest/services/mirta/FeatureServer (Layer 0 DoD Sites - Point, Layer…","p":"None.","b":"Authoritative DoD installation/range/training-area locations and boundaries for mapping the US military physical footprint.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"IISS Military Balance+ (force structure / inventories)","u":"https://www.iiss.org/the-military-balance-plus/","co":"Iiss","f":"No free tier (limited member preview). Annual Military Balance report has troop numbers and major weapon-system holdings by country.","p":"Paid subscription/institutional license to Military Balance+ online database with data…","b":"Authoritative global force-structure and equipment-inventory dataset (orders of battle, holdings by country) — premium.","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"ITU Space Explorer / Space Network System (SNS) filings","u":"https://www.itu.int/hub/2022/09/itu-space-explorer-satellite-data-dashboards/","co":"ITU","f":"Free web dashboards (pilot: geostationary networks in non-planned bands) plus downloadable SNS database files via ITU. NO public REST API; some 'My Space…","p":"Some detailed coordination data via paid ITU products/third parties.","b":"Authoritative satellite radio-frequency/orbital-slot filings and operator/network registrations for spectrum-asset analysis (not a programmatic API).","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ITU SpaceExplorer / Space Network Systems (SNS) database","u":"https://www.itu.int/itu-r/space/apps/public/spaceexplorer/networks-explorer","co":"ITU","f":"Web dashboards (SpaceExplorer) over the SNS database (Appendix 4 GSO/non-GSO/Earth-station/radio-astronomy filings), updated bi-weekly. NOT fully keyless…","p":"Some detailed coordination data via paid ITU products/third parties.","b":"Authoritative satellite radio-frequency/orbital-slot filings and operator/network registrations for spectrum-asset analysis. CORRECTION: requires…","s":"Available","fr":1,"kl":1,"kr":1,"cf":"m"},{"n":"Janes (order of battle, equipment & defence intelligence)","u":"https://www.janes.com/","co":"Janes","f":"No free tier.","p":"Commercial subscription / data services & APIs (Janes World Armies, World Air Forces…","b":"Premium open-source-intelligence reference for detailed force structure / orders of battle, platform inventories and defence-industry data (a peer…","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"LeoLabs Data Platform API (independent space catalog)","u":"https://platform.leolabs.space/documentation/api","co":"Leolabs","f":"Trial subscription (account + API key, OAuth2 login) with restrictions; GET /catalog/objects, state vectors, conjunction data from LeoLabs' own radar network.","p":"Paid subscription for full access (contact LeoLabs). Independent commercial LEO…","b":"Independent (non-US-Gov) commercial space-domain-awareness catalog, state vectors and conjunctions for LEO objects.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MarineCadastre Vessel Traffic (US AIS bulk, NOAA/BOEM)","u":"https://hub.marinecadastre.gov/pages/vesseltraffic","co":"Marinecadastre","f":"Free, keyless bulk download of historical US AIS data (zone/month CSV) plus ArcGIS REST services.","p":"None.","b":"Free bulk historical US AIS vessel-traffic data (includes AIS-transmitting government/military-adjacent traffic) for analysis.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"MarineTraffic AIS API (naval vessel positions)","u":"https://servicedocs.marinetraffic.com/","co":"Marinetraffic","f":"No meaningful free tier; trial/credits only.","p":"Paid per-API-service (PS/VD/EV endpoints), credit-based pricing. Note: warships often…","b":"Live AIS ship positions/particulars; limited for stealthy warships but useful for AIS-transmitting naval/support vessels.","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"N2YO Satellite Tracking REST API","u":"https://www.n2yo.com/api/","co":"N2yo","f":"Free with API key. Base https://api.n2yo.com/rest/v1/satellite/. Endpoints: tle, positions, visualpasses, radiopasses, above. Per-type transaction caps (e.g.…","p":"No paid tier; free with hourly per-type transaction caps (contact support for higher…","b":"Easy keyed REST for real-time satellite positions, pass predictions (visual/radio) and TLE by NORAD ID for observer locations.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NASA NOTAM API (FAA SWIM redistribution, via NASA DIP catalog)","u":"https://ntrs.nasa.gov/citations/20250003355","co":"NASA","f":"Free RESTful service that redistributes public FAA SWIM NOTAMs with value-added geospatial/temporal/authority structuring. Published for public access in the…","p":"None.","b":"Structured, developer-friendly access to public FAA NOTAMs without parsing raw SWIM feeds.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"NASA NOTAM API (SWIM redistribution)","u":"https://ntrs.nasa.gov/citations/20250003355","co":"NASA","f":"Free RESTful service (NASA Digital Information Platform) redistributing public FAA SWIM NOTAMs with value-added geospatial/temporal/authority structuring.…","p":"None.","b":"Structured, developer-friendly access to public FAA NOTAMs without parsing raw SWIM feeds. NOTE: linked URL is NTRS documentation; the service…","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Naval Vessel Register (NVR)","u":"https://www.nvr.navy.mil/","co":"Navy","f":"Free, keyless website (NAVSEA NAVSHIPSO), updated weekly. Ship/service-craft inventory with class, fleet, homeport, builder, key dates, status…","p":"None.","b":"Authoritative official inventory of every US Navy ship and service craft through its lifecycle (the naval-asset registry of record).","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NGA Geographic Names Server (GNS) - foreign GEOINT toponyms","u":"https://geonames.nga.mil/gns/html/gns_services.html","co":"Nga","f":"Free, keyless. ArcGIS Server REST services (e.g. geonames.nga.mil/geon-ags/rest/services/) plus WMS/WFS and bulk downloadable country/area files at…","p":"None.","b":"Authoritative foreign-area geographic/feature names for GEOINT, including foreign military-related toponyms.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NGA Geographic Names Server (GNS) - GEOINT toponyms","u":"https://geonames.nga.mil/gns/html/gns_services.html","co":"Nga","f":"Free, keyless. ArcGIS Server REST/JSON services plus pre-positioned downloadable country files (tab-delimited) at the GNS Data page. Foreign geographic names…","p":"None.","b":"Authoritative foreign-area geographic/feature names for GEOINT, including foreign military-related toponyms. VERIFIED: free, keyless, REST + bulk…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"NOAA SWPC Data Service (space weather - affects space assets)","u":"https://www.swpc.noaa.gov/content/data-access","co":"NOAA","f":"Free, keyless JSON/text/image products (solar wind, planetary Kp index + forecast, geomagnetic, alerts, F10.7 flux, satellite environment) at…","p":"None.","b":"Real-time space-weather conditions affecting satellite operations, drag/decay and orbital asset survivability.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenSky Network REST API (aircraft state vectors)","u":"https://openskynetwork.github.io/opensky-api/rest.html","co":"Openskynetwork","f":"Free for research/non-commercial. OAuth2 client-credentials ONLY (Basic auth with username/password is no longer accepted). Endpoints: /states/all…","p":"No standard paid tier; commercial use / extended history requires separate arrangement…","b":"Free crowd-sourced live ADS-B aircraft positions; can filter military by ICAO hex ranges (no built-in military flag like ADSBx).","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SAM.gov Contract Awards API (FPDS successor)","u":"https://open.gsa.gov/api/contract-awards/","co":"U.S. GSA","f":"Free with SAM.gov API key (api.data.gov / SAM.gov account via Login.gov). RESTful replacement for the FPDS Atom feed; includes DoD…","p":"None.","b":"Authoritative federal contract-award detail (incl. DoD) at transaction level via modern REST, superseding the legacy FPDS Atom feed.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"SIPRI Arms Transfers Database","u":"https://www.sipri.org/databases/armstransfers","co":"Sipri","f":"Free, keyless web tool at armstransfers.sipri.org (publicly accessible). All major conventional arms transfers 1950 to most recent full year…","p":"None.","b":"Authoritative open dataset of international major-weapons transfers (incl. US exports/imports) for arms-flow analysis.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"SIPRI Military Expenditure Database","u":"https://www.sipri.org/databases/milex","co":"Sipri","f":"Free, keyless Excel download. Annual military spending by country since 1949 (local currency, constant USD, % GDP, per capita). No REST API.","p":"None.","b":"Cross-country comparable defense-spending time series for benchmarking US vs global military expenditure.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Slingshot Aerospace (Seradata / Portal SSA)","u":"https://www.slingshot.space/","co":"Slingshot","f":"No free tier. Commercial SSA/space-traffic platform combining a global sensor network + the Seradata satellite/launch/anomaly database.","p":"Commercial: APIs, SaaS, on-prem, or whole-catalog licensing (contact sales).","b":"Commercial space-domain awareness, satellite/launch reference data (Seradata), and space-traffic coordination for defense/civil/commercial.","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Slingshot Aerospace - Seradata API / Portal SSA","u":"https://www.slingshot.space/product-seradata","co":"Slingshot","f":"No free tier. Commercial SSA platform combining a global sensor network (Portal) + Seradata satellite/launch/anomaly database (50,000+ spacecraft records…","p":"Commercial: the Seradata API is live (account/subscription) for satellite, launch and…","b":"Commercial space-domain awareness plus deep satellite/launch reference data (Seradata) for defense/civil/commercial. UPGRADED: Seradata API…","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"Space-Track.org API (18th Space Defense Squadron / USSPACECOM)","u":"https://www.space-track.org/documentation","co":"Space-Track","f":"Free with mandatory account (username/password auth, not an API key). Authoritative GP/GP_History, SATCAT, Decay, Boxscore, CDM (conjunction), TIP classes…","p":"None; free but registration + acceptance of US Gov terms required.","b":"The authoritative US government source-of-truth catalog for orbital data, decay predictions, and conjunction messages on all tracked objects.","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"TheSpaceDevs Launch Library 2 API","u":"https://thespacedevs.com/llapi","co":"Thespacedevs","f":"Free, keyless (rate-limited). Production base https://ll.thespacedevs.com/2.2.0/ (and 2.3.0); dev mirror lldev.thespacedevs.com. Endpoints: /launch/…","p":"Optional paid tiers (Patreon-backed) raise rate limits / unlock extra fields; core data…","b":"Free programmatic spaceflight data — launches, launch sites, spacecraft and operators (incl. US gov/military launch providers) for tracking space…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TLE API (tle.ivanstanojevic.me / api.nasa.gov mirror)","u":"https://tle.ivanstanojevic.me/","co":"Ivanstanojevic","f":"Free, keyless on tle.ivanstanojevic.me. Endpoints GET /api/tle?search={name} and GET /api/tle/{noradId}. JSON, CORS-enabled, daily refresh sourced from…","p":"None.","b":"Lightweight keyless JSON TLE lookup/search by name or NORAD ID for quick app integration. NOTE: NASA-mirrored access uses a NASA API key; direct…","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"TLE API (tle.ivanstanojevic.me, also fronted via api.nasa.gov)","u":"https://tle.ivanstanojevic.me/","co":"Ivanstanojevic","f":"Free, keyless. Endpoints GET /api/tle?search={name} and GET /api/tle/{noradId}. JSON (Hydra/JSON-LD), CORS-enabled, daily refresh sourced from CelesTrak.…","p":"None.","b":"Lightweight keyless JSON TLE lookup/search by name or NORAD ID for quick app integration.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"UCS Satellite Database","u":"https://www.ucs.org/resources/satellite-database","co":"Ucs","f":"Free bulk download (Excel + tab-delimited). ~7,560 operational satellites with 28 data fields: owner/operator/country, purpose, mass, power, orbit…","p":"None.","b":"Curated operator/purpose/ownership metadata for operational satellites (incl. military) for attribution analysis, not real-time tracking; note the…","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"USACE / HIFLD DoD Sites Boundary FeatureServer","u":"https://geospatial-usace.opendata.arcgis.com/datasets/fc0f38c5a19a46dbacd92f2fb823ef8c_1/about","co":"Arcgis","f":"Free, keyless ArcGIS REST (DoD Sites - Boundary, layer 1) via USACE GeoSpatial open data; also on HIFLD Open Data with GeoServices/WMS/WFS APIs and…","p":"None.","b":"Alternative authoritative GIS source for DoD site boundaries via USACE/HIFLD open data.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USAspending API - DoD/Defense awards","u":"https://api.usaspending.gov/","co":"USAspending","f":"Free, keyless REST. Filter by toptier agency (DoD), PSC/NAICS, recipient; endpoints e.g. /api/v2/search/spending_by_award/. Note ~90-day display delay for…","p":"None.","b":"Open federal procurement/award data for DoD contracts, recipients and place of performance (defense industrial base spend).","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS GNIS - Geographic Names Information System (US domestic)","u":"https://www.usgs.gov/us-board-on-geographic-names/download-gnis-data","co":"USGS","f":"Free, keyless. ArcGIS MapServer at https://carto.nationalmap.gov/arcgis/rest/services/geonames/MapServer plus OGC WMS/WFS, the Domestic Names Search (max…","p":"None.","b":"Authoritative US-domestic gazetteer of place/feature names including military features (bases, named DoD features) for geocoding and attribution.","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"}]},{"category":"Utilities & Water","count":27,"entries":[{"n":"CAISO OASIS API","u":"https://www.caiso.com/systems-applications/portals-applications/open-access-same-time-information-system-oasis","co":"Caiso","f":"Free, keyless (public reports, XML/CSV)","p":"n/a","b":"California ISO real-time/day-ahead LMP prices, demand forecasts","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"EIA Open Data API","u":"https://www.eia.gov/opendata/","co":"U.S. EIA","f":"Free w/ key (registration required)","p":"n/a","b":"Hourly grid demand/generation, electricity, natural gas series","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"EIA-930 Hourly Electric Grid Monitor","u":"https://www.eia.gov/electricity/gridmonitor/about","co":"U.S. EIA","f":"Free via EIA API/bulk download (key for API)","p":"n/a","b":"Hourly balancing-authority demand, net generation, interchange","s":"Available","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Electricity Maps API","u":"https://www.electricitymaps.com/free-tier-api","co":"Electricitymaps","f":"Free tier w/ key (1 zone, 50 req/hr, non-commercial)","p":"Paid plans for full/commercial multi-zone access","b":"Worldwide real-time and forecast grid carbon intensity","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Elexon BMRS Insights API (UK)","u":"https://developer.data.elexon.co.uk/","co":"Elexon","f":"Free, no API key (Insights Solution APIs; IRIS push free w/ account)","p":"n/a","b":"GB wholesale electricity balancing, system prices, market data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"ENTSO-E Transparency Platform API","u":"https://transparency.entsoe.eu/","co":"Entsoe","f":"Free w/ token (email request to enable RESTful access)","p":"n/a","b":"EU electricity load, generation, transmission, balancing data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPA ECHO (Enforcement & Compliance) Web Services","u":"https://echo.epa.gov/tools/web-services","co":"U.S. EPA","f":"Free, keyless REST services","p":"n/a","b":"Drinking water system search, SDWA violations, facility compliance","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Envirofacts Data Service API","u":"https://www.epa.gov/enviro/envirofacts-data-service-api","co":"U.S. EPA","f":"Free, keyless RESTful API (JSON/CSV/XML/Parquet)","p":"n/a","b":"SDWIS drinking water, CWNS wastewater, EPA environmental datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA SDWIS Federal Reporting (Safe Drinking Water)","u":"https://www.epa.gov/ground-water-and-drinking-water/safe-drinking-water-information-system-sdwis-federal-reporting","co":"U.S. EPA","f":"Free (data via Envirofacts/ECHO APIs and downloads)","p":"n/a","b":"Public water system characteristics, violations, compliance","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"ERCOT Public API","u":"https://developer.ercot.com/","co":"Ercot","f":"Free w/ account (OpenAPI/REST)","p":"n/a","b":"Texas grid load, generation, market reports and prices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Green Button (Connect My Data / ESPI standard)","u":"https://www.greenbuttondata.org/","co":"Greenbuttondata","f":"Free standard; access via participating utility OAuth","p":"n/a","b":"Standardized smart-meter electricity/gas/water usage data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"gridstatus (open-source Python library)","u":"https://opensource.gridstatus.io/","co":"Gridstatus","f":"Free, open-source (scrapes public ISO data)","p":"n/a","b":"CAISO, ERCOT, PJM, MISO, NYISO, SPP, ISONE data extraction","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"GridStatus.io API","u":"https://www.gridstatus.io/products/api","co":"Gridstatus","f":"Free account, 250 API calls/mo (1M rows/mo)","p":"Paid plans for higher volume","b":"Unified US/Canada ISO/RTO supply, demand, LMP pricing","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NOAA Tides & Currents (CO-OPS) API","u":"https://api.tidesandcurrents.noaa.gov/api/prod/","co":"NOAA","f":"Free, keyless","p":"n/a","b":"Coastal/Great Lakes water levels, tides, currents observations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"NREL Developer Network APIs (PVWatts, solar, electricity)","u":"https://developer.nrel.gov/docs/","co":"NREL","f":"Free w/ key (rate-limited)","p":"n/a","b":"Solar production estimates, utility rates, energy datasets","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NWS / NOAA Advanced Hydrologic Prediction Service (AHPS)","u":"https://water.weather.gov/ahps/","co":"NWS (NOAA)","f":"Free, keyless (river forecasts, observed stages, flood data)","p":"n/a","b":"River stage forecasts, flood categories, hydrologic observations","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Octopus Energy API (UK)","u":"https://docs.octopus.energy/rest/guides/endpoints/","co":"Octopus","f":"Free, keyless public products/tariff endpoints; account key for own consumption","p":"n/a","b":"Half-hourly Agile electricity tariff prices, smart-meter usage","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Open Infrastructure Map (OSM-based)","u":"https://openinframap.org/","co":"Openinframap","f":"Free, open data (OSM ODbL; export GeoPackage/Shapefile)","p":"n/a","b":"Global power lines, substations, plants, water/gas infrastructure","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"OpenEI Utility Rate Database (URDB) API","u":"https://openei.org/services/doc/rest/util_rates/","co":"Openei","f":"Free w/ NREL key","p":"n/a","b":"US utility electricity rate structures for 3,700+ utilities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PG&E / OpenEEI EIA-861 utility sales & customers (bulk)","u":"https://www.eia.gov/electricity/data/eia861/","co":"U.S. EIA","f":"Free, keyless bulk download","p":"n/a","b":"Annual US utility retail sales, customers, revenue by utility","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UK Carbon Intensity API (NESO)","u":"https://carbonintensity.org.uk/","co":"Carbonintensity","f":"Free, keyless","p":"n/a","b":"GB grid carbon intensity forecast and regional generation mix","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USGS Water Data APIs (Water Data for the Nation)","u":"https://api.waterdata.usgs.gov/","co":"USGS","f":"Free, keyless (public, OGC API)","p":"n/a","b":"Real-time streamflow, gage height, groundwater levels nationwide","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"USGS Water Services (legacy NWIS / WaterServices)","u":"https://waterservices.usgs.gov/","co":"USGS","f":"Free, keyless (decommissions Q1 2027; migrate to api.waterdata.usgs.gov)","p":"n/a","b":"Historical and real-time water site data, daily values","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"UtilityAPI","u":"https://utilityapi.com/docs","co":"Utilityapi","f":"Free sandbox/demo account; production billed","p":"Paid (per-meter/usage based)","b":"Authorized utility bill and interval usage data across US utilities","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Water Quality Portal (USGS + EPA WQX)","u":"https://www.waterqualitydata.us/","co":"Waterqualitydata","f":"Free, keyless web services","p":"n/a","b":"Hundreds of millions of discrete water-quality records, 400+ agencies","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WattTime API","u":"https://docs.watttime.org/","co":"Watttime","f":"Free plan w/ key (limited; CAISO_NORTH marginal emissions)","p":"WattTime Pro subscription for all locations","b":"Marginal emissions (MOER), real-time/forecast carbon signals","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"PowerOutage.us API","u":"https://poweroutage.us/use-our-data","co":"Poweroutage","f":"none (enterprise/commercial)","p":"Paid (contact for pricing)","b":"Aggregated live US/Canada/UK utility outage data, GeoJSON","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Vector DBs & RAG infrastructure (open)","count":26,"entries":[{"n":"Annoy (Spotify)","u":"https://github.com/spotify/annoy","co":"Spotify","f":"Free, open-source library (Apache 2.0), keyless","p":"n/a","b":"Memory-mapped ANN for large static datasets","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Chroma (ChromaDB)","u":"https://docs.trychroma.com/","co":"Trychroma","f":"Open-source self-host (Apache 2.0); Chroma Cloud $5 free credits","p":"Usage-based (Chroma Cloud, pay-as-you-go)","b":"Open-source embedded/server vector store for RAG prototyping","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Cloudflare Vectorize","u":"https://developers.cloudflare.com/vectorize/","co":"Cloudflare","f":"Free with Workers free plan (30M queried + 5M stored vector dims/mo)","p":"$0.04/100M queried dims, $0.05/100M stored dims/mo","b":"Serverless edge vector DB integrated with Cloudflare Workers","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Elasticsearch (kNN / Elastic Cloud)","u":"https://www.elastic.co/docs/solutions/search/vector/knn","co":"Elastic","f":"Elastic Cloud 7-day free trial; self-managed basic tier free","p":"$0.09/VCU-hr search (serverless) + storage","b":"Mature kNN dense + hybrid search at enterprise scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FAISS (Facebook AI Similarity Search)","u":"https://github.com/facebookresearch/faiss","co":"Meta","f":"Free, open-source library (MIT), keyless","p":"n/a","b":"In-process ANN similarity search C++/Python library","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"hnswlib","u":"https://github.com/nmslib/hnswlib","co":"Nmslib","f":"Free, open-source header-only library (Apache 2.0), keyless","p":"n/a","b":"Fast HNSW graph ANN library, in-process","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"LanceDB","u":"https://docs.lancedb.com/","co":"Lancedb","f":"Free open-source embedded lib (Apache 2.0); Cloud usage-based beta","p":"Usage-based, no monthly minimum (LanceDB Cloud)","b":"Embedded multimodal vector DB on Lance columnar format","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Marqo","u":"https://docs.marqo.ai/","co":"Marqo","f":"Free open-source self-host (Apache 2.0); Cloud pay-per-resource","p":"Pay-per-resource (Marqo Cloud)","b":"End-to-end tensor/vector search with built-in embedding","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Milvus / Zilliz Cloud","u":"https://milvus.io/docs","co":"Milvus","f":"Free tier 5GB + 2.5M vCUs/mo, no card; open-source self-host (Apache 2.0)","p":"$4 per million vCUs (serverless)","b":"Scalable open-source ANN vector DB for production","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"MyScale (MyScaleDB)","u":"https://myscale.com/","co":"Myscale","f":"Free pod supporting 5M 768D vectors; open-source MyScaleDB (Apache 2.0)","p":"Usage/standard pods (paid)","b":"SQL + vector search on ClickHouse for RAG","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Neon (serverless Postgres + pgvector)","u":"https://neon.com/docs/extensions/pgvector","co":"Neon","f":"Free tier ~100 compute-hrs/mo, ~0.5GB/project, pgvector + HNSW","p":"$19/mo Launch plan","b":"Serverless Postgres with branching and pgvector","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NMSLIB","u":"https://github.com/nmslib/nmslib","co":"Nmslib","f":"Free, open-source library (Apache 2.0), keyless","p":"n/a","b":"Non-metric space similarity search library","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"OpenSearch (k-NN vector search)","u":"https://docs.opensearch.org/latest/vector-search/","co":"Opensearch","f":"Free, open-source (Apache 2.0), self-host; keyless local","p":"n/a (managed via AWS OpenSearch Service)","b":"Open-source k-NN vector + lexical search engine","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"pgvector (PostgreSQL extension)","u":"https://github.com/pgvector/pgvector","co":"Pgvector","f":"Free, open-source Postgres extension (self-host)","p":"n/a (depends on Postgres host)","b":"Vector search inside existing PostgreSQL with ACID","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Pinecone","u":"https://docs.pinecone.io/","co":"Pinecone","f":"Free Starter: 1 serverless index, ~100K vectors, 2GB","p":"Pay-as-you-go ($8/M reads, $2/M writes, $0.33/GB-mo)","b":"Managed serverless vector DB for production RAG/agents","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Qdrant Cloud","u":"https://qdrant.tech/documentation/","co":"Qdrant","f":"Free 1GB-RAM/4GB-disk cluster, no card; open-source self-host (Apache 2.0)","p":"~$0.078/GB-hour paid clusters","b":"High-performance Rust vector DB with filtering, quantization","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Redis (Query Engine / vector search)","u":"https://redis.io/docs/latest/develop/ai/search-and-query/vectors/","co":"Redis","f":"Free open-source (Redis 8); Redis Cloud free 30MB tier","p":"Redis Cloud paid plans (usage-based)","b":"In-memory HNSW/FLAT vector search with hybrid queries","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"sqlite-vec","u":"https://github.com/asg017/sqlite-vec","co":"Asg017","f":"Free, open-source SQLite extension (MIT/Apache-2.0), keyless","p":"n/a","b":"Zero-dependency embedded vector search in SQLite, runs anywhere","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Supabase Vector (pgvector)","u":"https://supabase.com/docs/guides/ai","co":"Supabase","f":"Free tier 500MB DB with pgvector + auto REST API","p":"$25/mo Pro plan","b":"Managed Postgres + pgvector with auto-generated API","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"txtai","u":"https://neuml.github.io/txtai/","co":"Neuml","f":"Free, open-source embeddings database (Apache 2.0); FastAPI server","p":"n/a","b":"All-in-one embeddings DB for semantic search + RAG","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Upstash Vector","u":"https://upstash.com/docs/vector","co":"Upstash","f":"Free tier up to 10K vectors, no card; serverless REST API","p":"$0.40 per 100K requests (pay-as-you-go)","b":"Serverless vector DB for edge/serverless via REST","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Vald","u":"https://vald.vdaas.org/docs/","co":"Vdaas","f":"Free, open-source distributed vector engine (Apache 2.0), self-host","p":"n/a","b":"Cloud-native distributed ANN search on Kubernetes","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"VectorChord / pgvecto.rs (TensorChord)","u":"https://github.com/tensorchord/VectorChord","co":"Tensorchord","f":"Free, open-source Postgres extension (Apache 2.0/AGPL), self-host","p":"n/a (managed cloud available)","b":"Scalable Rust-based vector search extension for PostgreSQL","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Vespa.ai","u":"https://docs.vespa.ai/","co":"Vespa","f":"Free open-source self-host (Apache 2.0); Vespa Cloud free trial credits","p":"Consumption-based (Vespa Cloud)","b":"Combined vector + lexical + ranking/inference at scale","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Weaviate Cloud","u":"https://docs.weaviate.io/","co":"Weaviate","f":"Free 14-day sandbox; open-source self-host (BSD-3)","p":"$45/mo Flex plan (Serverless tier retired Oct 2025)","b":"Hybrid vector + keyword search, GraphQL/REST/gRPC","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"turbopuffer","u":"https://turbopuffer.com/docs","co":"Turbopuffer","f":"none (no free tier)","p":"$64/mo Launch plan","b":"Object-storage-backed cheap serverless vector + FTS","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]},{"category":"Waste, Recycling & Circular economy","count":28,"entries":[{"n":"Basel Convention national reporting / data visualization tool","u":"https://www.basel.int/Countries/NationalReporting/DataVisualizationTool/tabid/3216/Default.aspx","co":"Basel","f":"Free public data (visualization tool, downloads)","p":"n/a","b":"Transboundary hazardous-waste movement reporting","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Call2Recycle / Battery Network locator","u":"https://locator.batterynetwork.org/","co":"Batterynetwork","f":"Free public locator (web/JSON backend)","p":"n/a","b":"Battery & cellphone recycling drop-off locations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"CalRecycle Data Central (California recycling/e-waste facilities)","u":"https://calrecycle.ca.gov/datacentral/","co":"Ca","f":"Free, open data (CKAN API via data.ca.gov)","p":"n/a","b":"CA recycling centers, e-waste, CRV beverage containers","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Earth911 Search API","u":"https://api.earth911.com/","co":"Earth911","f":"Free w/ key (partner/approval based)","p":"n/a (contact)","b":"Largest US recycling/drop-off locator by material","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"EPA Cleanups in My Community / SEMS (Superfund) data","u":"https://www.epa.gov/enviro/sems-overview","co":"U.S. EPA","f":"Free, keyless (via Envirofacts SEMS tables)","p":"n/a","b":"Superfund/contaminated/hazardous-waste cleanup sites","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA ECHO (Enforcement & Compliance History Online) REST Services","u":"https://echo.epa.gov/tools/web-services","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"Compliance/enforcement records for RCRA waste facilities","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Envirofacts Data Service API (RCRAInfo)","u":"https://www.epa.gov/enviro/envirofacts-data-service-api","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"US hazardous waste handlers, TSDFs, generators by location","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Facility Registry Service (FRS) API","u":"https://www.epa.gov/frs/frs-api","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"Geospatial lookup of regulated waste facilities/sites","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA Sustainable Materials Management (SMM) / Facts & Figures data","u":"https://www.epa.gov/facts-and-figures-about-materials-waste-and-recycling","co":"U.S. EPA","f":"Free, open data (downloads + state/local tables)","p":"n/a","b":"US MSW generation, recycling, composting national stats","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"EPA Toxics Release Inventory (TRI) REST API","u":"https://www.epa.gov/enviro/envirofacts-data-service-api","co":"U.S. EPA","f":"Free, keyless","p":"n/a","b":"Facility toxic chemical waste releases & disposal data","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"EPA WARM (Waste Reduction Model) data & tools","u":"https://www.epa.gov/warm","co":"U.S. EPA","f":"Free, open data (downloadable model/factors)","p":"n/a","b":"GHG/energy impacts of waste management & recycling pathways","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Eurostat / EEA Waste & Circular Economy Monitoring (data.europa.eu CKAN)","u":"https://data.europa.eu/api/hub/search/","co":"European Union","f":"Free, keyless (CKAN-style search API)","p":"n/a","b":"EU open datasets on waste streams & circular-economy KPIs","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Eurostat Statistics API (Waste & Circular Economy)","u":"https://ec.europa.eu/eurostat/web/user-guides/data-browser/api-data-access/api-introduction","co":"European Commission","f":"Free, keyless (JSON-stat)","p":"n/a","b":"EU waste generation, treatment, recycling-rate stats","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OECD Data API (Environment / Municipal Waste, SDMX)","u":"https://sdmx.oecd.org/public","co":"OECD","f":"Free, keyless (SDMX REST)","p":"n/a","b":"OECD municipal waste & materials indicators","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Open Repair Alliance / Open Repair Data Standard (ORDS)","u":"https://openrepair.org/open-data/","co":"Openrepair","f":"Free, open data (CSV download, CC licensed)","p":"n/a","b":"Repair-event data extending product life (circular economy)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"openFDA","u":"https://open.fda.gov/apis/","co":"openFDA","f":"Free, keyless (rate-limited; key raises limits)","p":"n/a","b":"Adjacent: regulated-product/recall data, not waste-specific","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OpenLitterMap (open data + emerging JSON API)","u":"https://openlittermap.com/","co":"Openlittermap","f":"Free, open data (CSV download per location; JSON API planned)","p":"n/a","b":"Geotagged global litter & plastic pollution observations","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"ReCollect Waste (iCal/place-service feeds)","u":"https://recollect.net/","co":"Recollect","f":"Free public iCal/JSON feeds per municipality","p":"n/a (municipal contracts)","b":"Curbside pickup schedules & reminders by address","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Recycle Coach city/zone API","u":"https://api-city.recyclecoach.com/city/search","co":"Recyclecoach","f":"Undocumented public endpoints (used by integrations)","p":"n/a (municipal contracts)","b":"Municipal collection schedules & what-goes-where","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Resource Recovery from E-waste dataset (EPA, data.gov)","u":"https://catalog.data.gov/dataset/resoure-recovery-from-e-waste","co":"Data.gov","f":"Free, open data (data.gov; DataDictionary + dataset download)","p":"n/a","b":"Recoverable materials/metals from electronic waste (pyrolysis study)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"ScrapMonster (scrap metal prices & directory)","u":"https://www.scrapmonster.com/scrap-prices","co":"Scrapmonster","f":"Free price viewing on web; bulk data via subscription (no documented public API)","p":"$49/mo premium membership","b":"Global scrap metal/recyclable commodity prices","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"The Recycling Partnership Recycle Check / National Recycling Database","u":"https://recyclingpartnership.org/recyclecheck/","co":"Recyclingpartnership","f":"Partner-based (QR / How2Recycle integration)","p":"n/a (contact)","b":"Local accept/reject recyclability by ZIP & packaging","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"UN Environment / SDG 12 (Material Footprint, DMC) via UNSD SDG API","u":"https://unstats.un.org/sdgapi/swagger/","co":"United Nations","f":"Free, keyless (REST)","p":"n/a","b":"Global circular-economy indicators: material footprint, e-waste","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"WasteDataFlow (UK Local Authority waste, data.gov.uk)","u":"https://www.data.gov.uk/dataset/0e0c12d8-24f6-461f-b4bc-f6d6a5bf2de5/waste-data-flow","co":"Data.gov","f":"Free, open data (downloads)","p":"n/a","b":"UK municipal waste collection & recycling rates","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"World Bank What a Waste Global Database (Data Catalog / Data360)","u":"https://datacatalog.worldbank.org/search/dataset/0039597/what-a-waste-global-database","co":"World Bank","f":"Free, open data (bulk download + Data360 API)","p":"n/a","b":"Global solid-waste generation/composition, 217 countries","s":"Available","fr":1,"kl":0,"kr":0,"cf":"h"},{"n":"Nexus (RecycleNexus) Pricing API","u":"https://www.nexusrecycle.com/tutorial-website-pricing.php","co":"Nexusrecycle","f":"none (for Nexus software customers)","p":"Bundled w/ Nexus scrapyard software","b":"Push live scrap commodity prices to a website","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"RecycleNation API (DEPRECATED)","u":"https://recyclenation.com/recycling-api/","co":"Recyclenation","f":"none (API/widget access discontinued)","p":"n/a","b":"Was a US recycling-location locator; now web-only","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"},{"n":"ScrapIndex.com (historical scrap commodity prices)","u":"https://www.scrapindex.com/historic.html","co":"Scrapindex","f":"none (price reports sold per grade/period)","p":"Paid historical price reports (per material/period)","b":"Historical scrap metal/plastic commodity price reports","s":"Available","fr":0,"kl":0,"kr":0,"cf":"m"}]},{"category":"Zoos, Aquariums & Wildlife parks","count":22,"entries":[{"n":"API-Ninjas Animals API","u":"https://api-ninjas.com/api/animals","co":"Api ninjas","f":"Free w/ key (limited monthly calls)","p":"~$9-49/mo paid tiers","b":"Animal taxonomy/characteristics for zoo exhibit apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"AZA (Association of Zoos & Aquariums) Accredited Institution List","u":"https://www.aza.org/inst-status","co":"Aza","f":"Free public accredited-institution list (web page); full directory needs login","p":"n/a","b":"Roster of AZA-accredited zoos & aquariums (US + intl)","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"BGCI GardenSearch","u":"https://www.bgci.org/resources/bgci-databases/gardensearch/","co":"Bgci","f":"Free web database of botanic gardens; no public API (bulk access on request)","p":"n/a","b":"Global registry of botanic gardens & similar institutions","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"BGCI PlantSearch","u":"https://www.bgci.org/resources/bgci-databases/plantsearch/","co":"Bgci","f":"Free web search of living plant collections; no public API (bulk access on request)","p":"n/a","b":"Plant taxa held in botanic-garden living collections","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"EAZA Conservation Database","u":"https://www.eazaconservation.org/","co":"Eazaconservation","f":"Free public conservation-project database & map (web); full access for members","p":"n/a","b":"European zoo/aquarium conservation projects & EEP context","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"Fish Database (fishdatabase.com) API","u":"https://www.fishdatabase.com/api","co":"Fishdatabase","f":"Free plan w/ key (rate-limited, 429 + Retry-After)","p":"Pro plans w/ metered overage billing (Authorize.net)","b":"600+ freshwater/saltwater species for aquarium apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"FishBase API (rOpenSci / Apiary)","u":"https://ropensci.github.io/fishbaseapidocs/","co":"Ropensci","f":"Free, keyless REST read-only","p":"n/a","b":"Aquarium/exhibit fish species biology & taxonomy","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"GBIF Occurrence API (living-specimen records)","u":"https://techdocs.gbif.org/en/openapi/v1/occurrence","co":"GBIF","f":"Free, keyless (read/search); registration only for bulk downloads","p":"n/a","b":"Zoo/botanic-garden living-specimen occurrence records by species","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"iNaturalist API (captive/cultivated observations)","u":"https://www.inaturalist.org/pages/api+reference","co":"iNaturalist","f":"Free; keyless read, OAuth token for writes","p":"n/a","b":"Filter captive/cultivated animal & plant observations","s":"In use","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"IUCN Red List API (v4)","u":"https://api.iucnredlist.org/","co":"IUCN","f":"Free w/ key (token by request)","p":"n/a","b":"Conservation status of species in zoo/aquarium collections","s":"In use","fr":1,"kl":0,"kr":1,"cf":"h"},{"n":"Marine Regions Gazetteer REST API","u":"https://www.marineregions.org/gazetteer.php?p=webservices","co":"Marineregions","f":"Free, keyless REST/JSON webservice","p":"n/a","b":"Marine geographic regions/place names for aquarium exhibit context","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"National Park Service (NPS) Data API","u":"https://www.nps.gov/subjects/developer/api-documentation.htm","co":"Nps","f":"Free w/ key","p":"n/a","b":"Park/wildlife sites, facilities, alerts, visitor info","s":"In use","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"NOAA Fisheries InPort / ERDDAP","u":"https://www.fisheries.noaa.gov/inport/","co":"NOAA","f":"Free, keyless metadata + ERDDAP RESTful data services","p":"n/a","b":"Marine/reef fish survey datasets for aquarium science","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"OBIS - Ocean Biodiversity Information System API","u":"https://api.obis.org/","co":"BIS","f":"Free, keyless REST API (Swagger/OpenAPI)","p":"n/a","b":"Marine species distribution/abundance for aquarium context","s":"Available","fr":1,"kl":1,"kr":0,"cf":"h"},{"n":"Recreation.gov RIDB API (federal recreation areas/wildlife refuges)","u":"https://ridb.recreation.gov/","co":"Recreation","f":"Free w/ key","p":"n/a","b":"Federal rec sites incl. wildlife areas & facility data","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"SeaLifeBase API (rOpenSci, /sealifebase)","u":"https://ropensci.github.io/fishbaseapidocs/","co":"Ropensci","f":"Free, keyless read-only","p":"n/a","b":"Non-fish marine/aquatic species for aquariums","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USFWS ECOS Data Services (Environmental Conservation Online System)","u":"https://ecos.fws.gov/ecp/services","co":"Fws","f":"Free, keyless REST API (JSON/XML/CSV export)","p":"n/a","b":"ESA-listed species, taxonomy & status for wildlife parks","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"USFWS Open Data Portal (ArcGIS) - National Wildlife Refuges","u":"https://gis-fws.opendata.arcgis.com/","co":"Arcgis","f":"Free, keyless ArcGIS REST/GeoServices/WFS/WMS","p":"n/a","b":"Wildlife refuge boundaries & geospatial layers","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"WAZA Members Directory","u":"https://www.waza.org/members/waza-members/","co":"Waza","f":"Free public member list (web)","p":"n/a","b":"Global registry of WAZA zoos/aquariums & studbook programs","s":"Available","fr":1,"kl":0,"kr":0,"cf":"m"},{"n":"WoRMS - World Register of Marine Species REST API","u":"https://www.marinespecies.org/rest/","co":"Marinespecies","f":"Free, keyless REST webservice","p":"n/a","b":"Authoritative marine species names for aquarium collections","s":"Available","fr":1,"kl":1,"kr":0,"cf":"m"},{"n":"Zyla Fish Species Database API","u":"https://zylalabs.com/api-marketplace/data/fish+species+database+api/1428","co":"Zylalabs","f":"Free trial w/ key","p":"Subscription tiers (metered)","b":"Fish species names, status, images for aquarium apps","s":"Available","fr":1,"kl":0,"kr":1,"cf":"m"},{"n":"Species360 ZIMS / Insights","u":"https://species360.org/zims/","co":"Species360","f":"none (member institutions only; not an open public API)","p":"Membership-based subscription","b":"Authoritative animals-under-human-care records & studbooks","s":"Available","fr":0,"kl":0,"kr":1,"cf":"m"}]}]}