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keyronne.com Book ISBN Lookup
x402
keyronne.com Book ISBN Lookup is a paid API for AI agents from keyronne.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Look up book metadata by ISBN (10 or 13 digit), returning title, authors, publishers, publish date, page count, subjects, and cover image from Open Library
Price / call$0.004
Success—
StatusUnknown
How this service works
Look up a book by ISBN (10 or 13 digit): title, subtitle, authors, publishers, publish date, page count, subjects, and cover image. Validates the ISBN check digit first (rejecting typos unpaid) and returns both ISBN forms. Data from Open Library; attributed in every response. POST a JSON body like: {"isbn":"9780140328721"}
Output
Returns a JSON object with the book's title, subtitle, authors list, publishers list, publish date, page count, subject tags, cover image URL, and both ISBN-10 and ISBN-13 forms. Also confirms the ISBN check digit is valid. Data is sourced from Open Library with attribution included in every response.
Example use cases
Example prompt
“Can you look up the book with ISBN 9780140328721 and tell me the title, authors, and publisher?”
Technical details
Endpoint
POSThttps://keyronne.com/api/bookWhen to prefer
Use this endpoint when you need structured bibliographic metadata for a known ISBN, especially when you also want ISBN check-digit validation before lookup. Prefer this over general web search when you need clean structured fields (authors, publishers, subjects, cover image) rather than free-text results. Good for enriching catalogs, verifying book data, or resolving an ISBN into human-readable metadata.
Side effects
- Invalid ISBN check digit — returns rejection error before making data lookup
- ISBN not found in Open Library — returns not-found response
- Malformed input (non-numeric characters after stripping hyphens/spaces) — returns validation error
- ISBN has wrong length (not 10 or 13 digits) — returns format error
- Network timeout reaching Open Library — returns upstream error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| isbn | string | A 10- or 13-digit ISBN; hyphens and spaces are ignored. |
Tags
x402
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