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Open Library API

by Open Library Free tier

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.

entertainment

Quick Reference

Base URL https://openlibrary.org Auth type none Auth header # No auth required Rate limit See documentation Pricing Free tier available Free quota Completely free Documentation https://openlibrary.org/developers/api Endpoint status Live — HTTP 200 — endpoint is accessible1.13s (checked Mar 29, 2026) Builder score C 51% builder-friendly
Pricing
90
Latency
60
Depth
14

Authentication

No authentication required

# No auth required

Pricing

Model freemium Starting price Free tier available Free quota Completely free

Free — open public API, no authentication required.

Key Endpoints

MethodPathDescription
GET / See documentation for endpoint reference

Sample Request

curl 'https://openlibrary.org'

Sample Response

{}

Data sourced from API Map. Always verify pricing and rate limits against the official Open Library documentation.