Project Gutenberg API

A standardized interface for programmatically accessing over 70,000 free e-books in the public domain.

Project Gutenberg provides several machine-readable entry points (primarily via OPDS feeds and the Gutindex) to its massive repository of 70,000+ titles. Developers use these endpoints to fetch metadata, download full-text files in formats like EPUB and Kindle, and sync library updates. While the official site offers XML and RDF feeds, third-party wrappers like the Gutendex API (hosted on Vercel) simplify the process by providing a searchable JSON interface for filtering by author, topic, or popularity.

https://www.gutenberg.org/ebooks/feed/