Government — entry 021 of 90
Data.gov
api.data.gov is the shared API gateway the US federal government uses to front dozens of individual agency APIs — including NASA, the FEC, and USAspending — behind one signup and a single API key. It doesn't host data itself; it handles authentication, rate limiting, and monitoring for the underlying agency services, most of which respond in JSON. One free key, issued through a short signup form (or the shared `DEMO_KEY` for light testing), works across every participating API.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score78
Authentication15/25API key required
Pricing20/20Free to use
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/data-gov/"><img src="https://greatapis.com/badge/data-gov.svg" alt="Scored 78 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.