Book lookup by ISBN, book and author search, author works, subject lists, reading time and citation formatting from Open Library.
payments ON MAINNET (real money) · 7 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /author-search | $0.02 | Search authors by name: Open Library author ids, birth and death years, work counts and top works to tell namesakes apart. |
GET /author-works | $0.03 | An author's profile and catalogued works by Open Library author id: dates, links and the titles of their works. |
GET /book-by-isbn | $0.02 | Book details for an ISBN: title, authors, publisher, publish date, pages, subjects and cover link, from Open Library. |
GET /book-search | $0.02 | Search books by title or author words: matching works with authors, first publication year, edition count and ratings. |
GET /citation-format | $0.02 | Format a book citation in APA 7, MLA 9 and Chicago bibliography style from title, authors, year and publisher. |
GET /reading-time | $0.02 | Estimate reading or audiobook time from pages or word count, at your reading speed, with hours per day to finish in N days. |
GET /subject-books | $0.02 | Books filed under a subject (science fiction, cooking, stoicism...): total count and sample works with authors and first year. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Book facts come from Open Library, a community-edited catalogue run by the Internet Archive, and local computation, provided as is. Records can be incomplete, duplicated or wrong, and edition details vary. Citation formats follow common style-guide patterns but journals and instructors differ: check your style guide. Not bibliographic or legal advice. Every paid response carries a disclaimer field.