Book APIs let you search vast libraries of titles, authors, and publishing data. Build reading list apps, book recommendation engines, or integrate literary data into educational platforms.
Last verified: November 12, 2026
| Name | Description | Auth | HTTPS | CORS | Uptime (30 days) |
|---|---|---|---|---|---|
| Amanah Sunnah | Semantic search across Quran, Hadith, Tafsir & 18K+ Rijal narrators | apikey | Yes | yes | 100% (5 checks) |
| Bayan | Arabic Islamic encyclopedia: hadith with grades and takhrij, Quran with tafsir, narrators | none | Yes | yes | 100% (1 check) |
| Bhagavad Gita | Open Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi | apikey | Yes | yes | 100% (5 checks) |
| Bhagavad Gita telugu | Bhagavad Gita API in telugu and odia languages | none | Yes | yes | 100% (5 checks) |
| Bible-api | Free Bible API with multiple languages | none | Yes | yes | 100% (5 checks) |
| Big Book | The Big Book API allows you to semantically search, filter, sort, and recommend books | apikey | Yes | yes | 100% (5 checks) |
| BookRank | Book rankings from open reader ratings: books, series, reading orders and authors | none | Yes | yes | 100% (5 checks) |
| Buku Indonesia | Open data for Indonesian books by ISBN, author, and category | none | Yes | yes | 100% (1 check) |
| Crossref Metadata Search | Books & Articles Metadata | none | Yes | unknown | 100% (5 checks) |
| Ganjoor | Classic Persian poetry works including access to related manuscripts, recitations and music tracks | oauth | Yes | yes | 100% (5 checks) |
| Google Books | Books | oauth | Yes | unknown | 100% (5 checks) |
| Greenlit Books | Catalog of practical AI books with search, series, glossary and a claim ledger | none | Yes | yes | 100% (5 checks) |
| Gutendex | Web-API for fetching data from Project Gutenberg Books Library | none | Yes | unknown | 100% (5 checks) |
| Harry Potter | API to get data from Harry Potter books, movies and characters | none | Yes | yes | 100% (5 checks) |
| Holy Bible API | Free Bible API serving 800+ text translations and 40+ audio translations | none | Yes | no | 100% (5 checks) |
| KDP Intelligence | KDP niche demand scores, competition analysis and revenue estimates | none | Yes | yes | 100% (5 checks) |
| Library Management | Manage users, books, authors, loans and reviews | none | Yes | yes | 100% (5 checks) |
| Library of Congress | Search the Library of Congress collections (books, photos, maps, manuscripts, recordings) and get item metadata as JSON by adding fo=json to any loc.gov search. | none | Yes | yes | 100% (3 checks) |
| Open Library | Books, book covers and related data | none | Yes | no | 100% (5 checks) |
| Penguin Publishing | Books, book covers and related data | none | Yes | yes | 100% (5 checks) |
| PoetryDB | Enables you to get instant data from our vast poetry collection | none | Yes | yes | 100% (5 checks) |
| Quran | RESTful Quran API with multiple languages | none | Yes | yes | 100% (5 checks) |
| Quran Cloud | A RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy Quran | none | Yes | yes | 100% (5 checks) |
| Quran-api | Free Quran API Service with 90+ different languages and 400+ translations | none | Yes | yes | 100% (5 checks) |
| Readark | Dark romance books with separate spice and darkness ratings, subgenres, tropes and authors | none | Yes | yes | 100% (4 checks) |
| Runyankole Bible | Free REST API for the Runyankore-Rukiga Bible — 66 books, 31106 verses | none | Yes | yes | 100% (5 checks) |
| Sefaria | Jewish texts | none | Yes | yes | 100% (5 checks) |
| Stephen King | The varied works and characters of the prolific author Stephen King | none | Yes | unknown | 100% (5 checks) |
| The Bible | Everything you need from the Bible in one discoverable place | apikey | Yes | unknown | 100% (5 checks) |
| Thirukkural | 1330 Thirukkural poems and explanation in Tamil and English | none | Yes | yes | 100% (5 checks) |
| Wizard World | Get information from the Harry Potter universe | none | Yes | yes | 100% (5 checks) |
| Wolne Lektury | API for obtaining information about e-books available on the WolneLektury.pl website | none | Yes | unknown | 100% (5 checks) |
26 of these APIs require no authentication — you can start making requests immediately without signing up for an account. Just pick one from the table above, check its documentation, and send your first request.
4 APIs in this category require a free API key. This usually means creating a free account on the provider's website and copying your key from the dashboard. The process typically takes less than a minute.
Not sure where to start? Check the uptime column: it shows how often each API's documentation responded to our daily checks over the last 30 days, and the dot shows whether it responded at the latest check. For browser-based projects, check that the API supports CORS.
Yes, all APIs listed on API Bouncer have a free tier. Some are completely open (no sign-up needed), while others require a free account to get an API key. Free tiers typically have rate limits — check each API's documentation for specifics.
It depends on your needs. Consider: Do you need authentication or prefer no-auth? Does your project need CORS support for browser access? How many requests will you make? Start with a no-auth API to prototype quickly, then switch to a more feature-rich option if needed.
We run periodic health checks on all listed APIs. The "Status" column shows whether each API was responding at our last check. APIs marked as "alive" were recently verified. You can also test any API yourself using curl or our guides on testing APIs.
Most free APIs allow commercial use, but terms vary by provider. Always check the specific API's terms of service. Some APIs have separate free and commercial tiers with different rate limits.
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