Explore free Open Data APIs available for developers. Browse our collection of public APIs in the Open Data category, each verified and documented for easy integration into your projects.
Last verified: April 1, 2026
| Name | Description | Auth | HTTPS | CORS | Status |
|---|---|---|---|---|---|
| 18F | Unofficial US Federal Government API Development | none | No | unknown | dead |
| 49 Gallery Historical Data | Normalized historical records and 25 daily-updated reference series | none | Yes | yes | unknown |
| AcreLens | Land suitability scoring API for any US property: off-grid, rural, recreational, investment | apikey | Yes | unknown | unknown |
| API Setu | An Indian Government platform that provides a lot of APIS for KYC, business, education & employment | none | Yes | yes | dead |
| Archive.org | The Internet Archive | none | Yes | no | alive |
| Big Data Explained | Cloud data warehouse list prices, read daily from AWS and Azure pricing APIs, with price history | none | Yes | yes | unknown |
| Black History Facts | Contribute or search one of the largest black history fact databases on the web | apikey | Yes | yes | alive |
| BotsArchive | JSON formatted details about Telegram Bots available in database | none | Yes | unknown | alive |
| BTU Graph | Source-reviewed energy company knowledge graph and directory exports | none | Yes | yes | unknown |
| CollegeScoreCard.ed.gov | Data on higher education institutions in the United States | none | Yes | unknown | alive |
| CoworkingView | Coworking spaces and offices in 63 European and Gulf cities with operator-published prices | none | Yes | no | unknown |
| CuttingToolsAI | Cross-brand carbide insert grade equivalents by ISO application class | none | Yes | yes | unknown |
| Enigma Public | Broadest collection of public data | apikey | Yes | yes | alive |
| EOSL | Hardware end-of-sale and end-of-service-life dates by part number, source-linked | none | Yes | yes | unknown |
| French Address Search | Address search via the French Government | none | Yes | unknown | alive |
| GENESIS | Federal Statistical Office Germany | oauth | Yes | unknown | alive |
| HousingFeed | US rental listings from property managers' own websites, verified weekly | none | Yes | yes | unknown |
| i6eal Open AI Data | Open datasets on AI policy, regulation and public-sector adoption in Germany and the EU | none | Yes | yes | unknown |
| Joshua Project | People groups of the world with the fewest followers of Christ | apikey | Yes | unknown | alive |
| K-Data Gate | Korean market data: K-beauty/K-food products, Naver trends, stocks, real estate, weather | apikey | Yes | unknown | unknown |
| Kaggle | Create and interact with Datasets, Notebooks, and connect with Kaggle | apikey | Yes | unknown | dead |
| LottoLens PH | Fixed Philippine PCSO historical results and normal draw schedules | none | Yes | yes | unknown |
| Lowy Asia Power Index | Get measure resources and influence to rank the relative power of states in Asia | none | Yes | unknown | alive |
| Microburbs | Australian property and suburb data: valuations, sales, rents, schools, demographics, risk, zoning | apikey | Yes | no | unknown |
| ModelPartFinder Error Codes | Lookup appliance and equipment error codes by brand and code, with recommended replacement parts | none | Yes | yes | unknown |
| MostExpensiveWatches | Documented luxury watch auction records, live listings, valuations and price indices | none | Yes | yes | unknown |
| Nasdaq Data Link | Stock market data | apikey | Yes | unknown | alive |
| Nobel Prize | Open data about nobel prizes and events | none | Yes | yes | alive |
| Onyx Bazaar | Free public leaderboard of x402 paid HTTP services indexed from Coinbase CDP discovery API | none | Yes | unknown | unknown |
| OpenCorporates | Data on corporate entities and directors in many countries | apikey | Yes | unknown | alive |
| OpenSanctions | Data on international sanctions, crime and politically exposed persons | none | Yes | yes | alive |
| PayCrunch | US wages for 1,008 occupations and by state, from BLS OEWS May 2025, static JSON, CC BY 4.0 | none | Yes | yes | unknown |
| PeakMetrics | News articles and public datasets | apikey | Yes | unknown | alive |
| PublicDataHub | US public schools, hospitals and federal agency budgets as JSON/CSV, with provenance | none | Yes | yes | unknown |
| Registrum | UK company data: profiles, directors, PSC, iXBRL-parsed financials, ECCTA status | apikey | Yes | no | unknown |
| Scoop.it | Content Curation Service | apikey | No | unknown | alive |
| SlashYear | 86,902 historical events as JSON, each quoted from a cited Wikipedia revision | none | Yes | yes | unknown |
| Statistics of the World | Economic data for 218 countries — GDP, population, inflation, and 440+ indicators from IMF and World Bank | none | Yes | yes | unknown |
| Teleport | Quality of Life Data | none | Yes | unknown | dead |
| Tilth | Free daily UK fertiliser price index across nine grades, CC BY 4.0 licensed | none | Yes | yes | unknown |
| Umeå Open Data | Open data of the city Umeå in northen Sweden | none | Yes | yes | alive |
| Universities List | University names, countries and domains | none | Yes | unknown | alive |
| UPC database | More than 1.5 million barcode numbers from all around the world | apikey | Yes | unknown | alive |
| Voidly | Internet censorship measurements, incidents, and ISP-level blocking data across 126 countries | none | Yes | no | unknown |
| Warnely | Composite travel-safety scores for 180 countries (FCDO + US State + GPI + WGI + live incident wire), OpenAPI 3.1 spec, CC BY 4.0 | none | Yes | yes | unknown |
| Wikidata | Collaboratively edited knowledge base operated by the Wikimedia Foundation | oauth | Yes | unknown | alive |
| Wikipedia | Mediawiki Encyclopedia | none | Yes | unknown | alive |
| Yelp | Find Local Business | oauth | Yes | unknown | dead |
32 of these APIs require no authentication — you can start making requests immediately without signing up for an account. Just pick one from the table above, check its documentation, and send your first request.
13 APIs in this category require a free API key. This usually means creating a free account on the provider's website and copying your key from the dashboard. The process typically takes less than a minute.
Not sure where to start? Look for APIs marked as "alive" in the status column — these were recently verified as working. For browser-based projects, check that the API supports CORS.
Yes, all APIs listed on API Bouncer have a free tier. Some are completely open (no sign-up needed), while others require a free account to get an API key. Free tiers typically have rate limits — check each API's documentation for specifics.
It depends on your needs. Consider: Do you need authentication or prefer no-auth? Does your project need CORS support for browser access? How many requests will you make? Start with a no-auth API to prototype quickly, then switch to a more feature-rich option if needed.
We run periodic health checks on all listed APIs. The "Status" column shows whether each API was responding at our last check. APIs marked as "alive" were recently verified. You can also test any API yourself using curl or our guides on testing APIs.
Most free APIs allow commercial use, but terms vary by provider. Always check the specific API's terms of service. Some APIs have separate free and commercial tiers with different rate limits.
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