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Free Books, Words & Learning APIs
Dictionaries that need no key, millions of books, classic poetry and a word-finding engine writers swear by. Perfect for reading apps, word games and learning tools.
✅ Verified = endpoint-tested by us · 📋 Listed = link-checked, endpoint test pending
35 APIs · 5 live-verified · 25 need no key
Definitions, phonetics, synonyms and audio for English words. No key, beautifully simple.
Not responding · checked 22 Oct 2026📁 Books, Words & Learning · Free, no key
A word-finding engine — rhymes, synonyms, 'sounds like' and 'means like' queries for writers and games.
Live · verified 22 Oct 2026 · 953 ms📁 Books, Words & Learning · Free: 100k req/day
Search millions of books, authors and covers from the Internet Archive's open catalog.
Live · verified 22 Oct 2026 · 1462 ms📁 Books, Words & Learning · Free, fair use
70,000+ free classic books with full metadata and download links.
Live · verified 22 Oct 2026 · 991 ms📁 Books, Words & Learning · Free, no key
The world's poetry in an API — search by poet, title or line.
Live · verified 22 Oct 2026 · 981 ms📁 Books, Words & Learning · Free, no key
Article summaries, featured content and media from Wikipedia in clean JSON.
Live · verified 22 Oct 2026 · 854 ms📁 Books, Words & Learning · Free, be polite
Bhagavad Gita API in telugu and odia languages
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Free Bible API with multiple languages
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
The Big Book API allows you to semantically search, filter, sort, and recommend books
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Books & Articles Metadata
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Classic Persian poetry works including access to related manuscripts, recitations and music tracks
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Books
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Read-only JSON API and remote MCP server over a catalog of practical AI books, with a claim ledger behind every page
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
API to get data from Harry Potter books, movies and characters
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Free Bible API serving 800+ text translations and 40+ audio translations
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Manage users, books, authors, loans and reviews
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Books, book covers and related data
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
RESTful Quran API with multiple languages
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
A RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy Quran
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Free Quran API Service with 90+ different languages and 400+ translations
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Resolve scholarly IDs (DOI, PMID, ISBN, arXiv) and format citations in multiple styles
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Jewish texts
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
The varied works and characters of the prolific author Stephen King
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Everything you need from the Bible in one discoverable place
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
1330 Thirukkural poems and explanation in Tamil and English
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Get information from the Harry Potter universe
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
API for obtaining information about e-books available on the WolneLektury.pl website
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Online open-access digital library for pre-modern Chinese texts
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Dictionary and Thesaurus Data
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Dictionary Data
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Synonyms, thesaurus and antonyms information for any given word
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Collaborative dictionary data
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Dictionary Data
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
Definitions and synonyms for more than 150,000 words
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs
An API for the English Language. Find definitions, related words, and more
Listed · link checked 22 Oct 2026📁 Books, Words & Learning · Free tier — confirm exact limits in the official docs