Every agency below exposes machine-readable public data. Authentication patterns are harmonized through a single api.data.gov key wherever possible.
| Code | Agency | Domain | Endpoints | Auth | Status | |
|---|---|---|---|---|---|---|
| FEC | Federal Election Commission | Elections | 38 | api.data.gov | Live | Open |
| JOBS | USAJOBS | Federal Hiring | 12 | Bearer + UA | Live | Open |
| NASA | NASA Open APIs | Space / Earth | 22 | api.data.gov | Live | Open |
| NPS | National Park Service | Public Lands | 14 | api.data.gov | Live | Open |
| USGS | U.S. Geological Survey | Geoscience | 9 | Public | Live | Open |
| FDA | openFDA | Health | 18 | Public | Live | Open |
| FEDREG | Federal Register | Rulemaking | 11 | Public | Live | Open |
| HOLIDAYS | Public Holidays | Calendar | 3 | Public | Live | Open |
| NWS | National Weather Service | Weather | 14 | Public | Live | Open |
| TREAS | U.S. Treasury Fiscal Data | Fiscal | 36 | Public | Live | Open |
| SEC | SEC EDGAR | Markets | 21 | Public | Live | Open |
| EIA | Energy Information Admin. | Energy | 47 | API key | Roadmap | — |
| FRED | Federal Reserve / FRED | Economy | 31 | API key | Roadmap | — |
| BLS | Bureau of Labor Statistics | Labor | 8 | API key | Roadmap | — |
| CENSUS | U.S. Census Bureau | Demographics | 65 | api.data.gov | Roadmap | — |
| USDA | USDA NASS QuickStats | Agriculture | 11 | api.data.gov | Roadmap | — |
| SAM | GSA / SAM.gov | Procurement | 40 | API key | Roadmap | — |
| VA | Department of Veterans Affairs | Veterans | 19 | API key | Roadmap | — |
| CMS | Centers for Medicare & Medicaid | Healthcare | 27 | API key | Roadmap | — |
| GOV | data.gov Catalog | Discovery | 6 | Public | Roadmap | — |