Greenlit Books
Books
Catalog of practical AI books with search, series, glossary and a claim ledger
No keyCORSHTTPS
Free Books APIs
Book metadata, full texts, libraries and reading lists.
35 listed · 22 need no key · 7 work in the browser
Penguin Publishing
Books
Books, book covers and related data
No keyCORSHTTPS
Quran
Books
RESTful Quran API with multiple languages
No keyCORSHTTPS
Rig Veda
Books
Gods and poets, their categories, and the verse meters, with the mandal and sukta number
No keyCORSHTTPS
Runyankole Bible
Books
Free REST API for the Runyankore-Rukiga Bible — 66 books, 31106 verses
No keyCORSHTTPS
Wolne Lektury
Books
API for obtaining information about e-books available on the WolneLektury.pl website
No keyCORSHTTPS
Bhagavad Gita telugu
Books
Bhagavad Gita API in telugu and odia languages
No keyHTTPS
Bible-api
Books
Free Bible API with multiple languages
No keyHTTPS
BookRank
Books
Book rankings from open reader ratings: books, series, reading orders and authors
No keyCORSHTTPS
British National Bibliography
Books
Books
No key
Crossref Metadata Search
Books
Books & Articles Metadata
No keyHTTPS
GurbaniNow
Books
Fast and Accurate Gurbani RESTful API
No keyHTTPS
Gutendex
Books
JSON web API for Project Gutenberg ebook metadata. Provides book information, search, and filtering options. Hosted on GitHub.
No keyHTTPS
Harry Potter API
Books
API to get data from Harry Potter books, movies, characters and spells
No keyHTTPS
KDP Intelligence
Books
KDP niche demand scores, competition analysis and revenue estimates
No keyHTTPS
Open Library
Books
Books, book covers and related data
No keyHTTPS
PoetryDB
Books
An API for internet poets to access and retrieve poetry data. Users can search for poems by title, author, lines, line count, and more, and receive the results in JSON format.
No keyHTTPS
Quran Cloud
Books
A RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy Quran
No keyHTTPS
Quran-api
Books
Free Quran API Service with 90+ different languages and 400+ translations
No keyHTTPS
Thirukkural
Books
1330 Thirukkural poems and explanation in Tamil and English
No keyHTTPS
Urantia Papers
Books
Full-text and semantic search across the Urantia Papers, with audio narration, entities and translations
No keyHTTPS
Wizard World
Books
Get information from the Harry Potter universe
No keyHTTPS
A Bíblia Digital
Books
Do not worry about managing the multiple versions of the Bible
API keyHTTPS
Amanah Sunnah
Books
Semantic search across Quran, Hadith, Tafsir & 18K+ Rijal narrators
API keyHTTPS
All 35 Books APIs
- Greenlit Books
- Penguin Publishing
- Quran
- Rig Veda
- Runyankole Bible
- Wolne Lektury
- Bhagavad Gita telugu
- Bible-api
- BookRank
- British National Bibliography
- Crossref Metadata Search
- GurbaniNow
- Gutendex
- Harry Potter API
- KDP Intelligence
- Open Library
- PoetryDB
- Quran Cloud
- Quran-api
- Thirukkural
- Urantia Papers
- Wizard World
- A Bíblia Digital
- Amanah Sunnah
- Bhagavad Gita
- Bhagavad Gita
- Blackbook Wiki API
- Europaplus API
- Ganjoor
- GetConverter API
- Google Books
- Open Library Search API
- The Bible
- Urantia Papers API
- V.gd API
Free Books APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free books APIs are there?
We track 35 in this category, of which 29 responded at our last check. 22 of them need no API key.
Which books APIs work without an API key?
22 of the 35 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these books APIs in a browser app?
7 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free books API?
Of the keyless options that responded at our last check, Thirukkural was quickest at a median 365 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 361 of 3,005 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.