Find Public APIsA building block for your next idea.
Make a reading-list search that helps a person choose a book by title or author.
Know before you build
Intended for low-volume, human-facing book discovery. Cache requests; the default limit is 1 request/second. Not intended as a high-traffic commercial backend.
Check current provider documentation ↗Your first request
Start with this documented example. Replace credential placeholders with your own test credentials. Browser execution depends on the provider’s CORS policy.
curl --request GET 'https://openlibrary.org/search.json?q=the+hobbit&limit=5'Practical questions
What can I build with Open Library?+
Make a reading-list search that helps a person choose a book by title or author.
Does Open Library need authentication?+
The reviewed example is listed as “No key”. Intended for low-volume, human-facing book discovery. Cache requests; the default limit is 1 request/second. Not intended as a high-traffic commercial backend.
Can I call Open Library from a browser?+
Browser access depends on the provider’s CORS policy for your origin, method, and headers. The playground makes a direct request and cannot bypass those restrictions.
Sources & confidence
Provider documentation was reviewed on 16 September 2026. This is not a live availability test or an endorsement.
Source catalogs can become outdated. Read our review and attribution policy. Plain-text guide ↗