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eu-verify ISBN Lookup
x402
eu-verify ISBN Lookup is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Looks up book metadata by ISBN (ISBN-10 or ISBN-13) including title, authors, cover, publishers, and subjects via Open Library
Price / call$0.002
Success—
StatusUnknown
How this service works
Resolves an ISBN-10 or ISBN-13 to a normalized bibliographic record from Open Library (Internet Archive): title, authors, publishers, publish date, page count, ISBN identifiers, subjects and cover image URL. Query: ?isbn=9780140328721 (hyphens/spaces tolerated). Unknown ISBNs return 400 (not charged). 7-day cache. Built for catalog management, e-commerce listings and used-book pricing agents.
Output
Returns a JSON object with the book's title, authors list, subtitle, ISBN-10, ISBN-13, subjects, cover image URL, publisher(s), publish date, number of pages, Open Library ID, and a direct link to the Open Library record.
Example use cases
Verify book details for library catalog
“I'm building a reading list and need you to look up the metadata for ISBN 9780062316097 — can you get me the title, all the authors, subjects, and a link to the cover image?”
Check publisher and publication dates
“We're creating a bibliography for a research paper and need to verify the publisher and exact publication date for the book with ISBN 9781984826342. Can you pull that information for me?”
Find book information by ISBN lookup
“A customer just gave me an ISBN 9780451524935 and I need to know what book that is, who wrote it, and whether we have it in our system — can you look that up quickly?”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/books/isbnWhen to prefer
Use this endpoint when you need to resolve bibliographic metadata for a known ISBN number and want structured data including cover art, authors, subjects, and publisher. Prefer it over general web search when you need machine-readable book data. Note: this is hosted on an EU business verification platform as a supplemental data endpoint, so it is available pay-per-call with no account needed.
Side effects
- ISBN not found in Open Library — empty or 404 response
- Malformed ISBN input (non-numeric, wrong length) — validation error
- Payment not completed via x402 — HTTP 402 with machine-readable price quote
- Network timeout or Open Library upstream unavailability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"isbn": "9780140328721",
"title": "Fantastic Mr. Fox",
"source": "Open Library (openlibrary.org, Internet Archive)",
"authors": [
"Roald Dahl"
],
"isbn_10": "0140328726",
"isbn_13": "9780140328721",
"subjects": [
"Animals",
"Hunger",
"Juvenile fiction",
"Foxes",
"Fiction"
],
"subtitle": null,
"cover_url": "https://covers.openlibrary.org/b/id/15152634-L.jpg",
"publishers": [
"Puffin"
],
"publish_date": "October 1, 1988",
"openlibrary_id": "OL7353617M",
"number_of_pages": 96,
"openlibrary_url": "http://openlibrary.org/books/OL7353617M/Fantastic_Mr._Fox"
}
}Tags
x402
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