Open Library API

Books · Operational · 30d uptime 92.86%

Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free.

Trust signals

Pricing

FREE

Auth

NONE

CORS

No

Rate limit

Unknown

Health

620ms

Trust score

85 (B)

Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 92.86%

Strong candidate; weakest signal is CORS.

Links

Homepageopenlibrary.org
Documentationopenlibrary.org/developers/api
Base URLopenlibrary.org/developers/api

Integration checklist

Auth is NONE
No CORS — route calls through your backend.
Rate limit: Unknown

More books APIs