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Open Library

Open Data

Open bibliographic data for millions of books: search, editions, authors, covers and ISBN lookups.

Open Library is listed in Open Data.

Auth No auth Pricing Free URL https://openlibrary.org/ Docs https://openlibrary.org/developers/api

Key metrics

Free and keyless Rate limit Free and keyless; cover/read APIs are throttled (~100 covers/IP/5 minutes) and a descriptive User-Agent is requested.

Gotchas

No gotchas documented yet. Contribute one if you know a constraint we missed.

Labels

  • No auth

    No auth

    Callable with no API key or login — lowest-friction to integrate.

books library bibliographic isbn metadata
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