Science & Math — entry 015 of 28
NASA ADS
The NASA Astrophysics Data System's developer API provides programmatic search, metrics, export, and library-management access over its bibliographic database of astronomy and physics literature. Access is a personal Bearer token generated from an ADS account settings page rather than a full OAuth authorization flow, and each endpoint publishes its own rate limit in the response headers. It's free to use for research.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
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/nasa-ads/"><img src="https://greatapis.com/badge/nasa-ads.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.