Free Books APIs

Bhagavad Gita Telugu API delivers all Gita verses in Telugu and Odia languages with no authentication required.

Bible-api.com is a free, no-auth REST API that returns Bible verses and passages in multiple translations using a simple URL pattern.

The British National Bibliography API exposes Linked Data about books published in the UK and Ireland, including titles, authors, ISBNs, and subject classifications.

Crossref Metadata Search provides free REST access to bibliographic metadata for over 140 million scholarly articles, books, and conference papers indexed by DOI.

Gutendex exposes the full Project Gutenberg catalogue—over 70,000 free ebooks—as a clean JSON API.

Open Library is the Internet Archive's book database covering millions of editions, authors, and subjects.

Penguin Random House's REST web service lets you query their full catalogue for titles, authors, and ISBNs.

PoetryDB serves a curated collection of classic English poems via a simple REST API—searchable by author, title, or first line.

Quran Cloud provides a RESTful API to fetch individual verses (Ayah), chapters (Surah), sections (Juz), or the complete Quran text with multiple audio recitations and translations.

This community-maintained Quran API hosts the full Quran text in 90+ languages and 400+ translations as static JSON files on GitHub CDN—no rate limits, no key needed.

Thirukkural API delivers all 1,330 couplets of the ancient Tamil classic Thirukkural with explanations in both Tamil and English.

Wizard World provides programmatic access to get information from the harry potter universe via REST API.

Wolne Lektury is Poland's national digital library API, giving access to thousands of freely available Polish literary works including full texts, author data, and cover images.