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Afterwren Books API
x402
Afterwren Books API is a paid API for AI agents from afterwren.cybermaxtools.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).
Search for books by title, author, or ISBN and retrieve metadata, replacing the retired Goodreads API
Price / call$0.002
Success—
StatusUnknown
How this service works
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Output
A JSON array of book records matching the query, each containing bibliographic metadata such as title, author(s), ISBN, description, publication date, and cover image URL, up to the specified limit (default 5, max 10).
Example use cases
Book lookup for reading list app
“Look up book details for 'Project Hail Mary' by Andy Weir — I need the ISBN, author info, and a description, up to 5 results.”
ISBN-based book identification
“I have the ISBN 9780439023481 — can you find the book details for it, like the title, author, and publication info?”
Author bibliography discovery
“Search for books by Ursula K. Le Guin and give me the top 10 results with their titles and ISBNs.”
Technical details
Endpoint
GEThttps://afterwren.cybermaxtools.com/x402/api/books?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need bibliographic data for books (by title, author, or ISBN) and Goodreads API is unavailable or retired. It is ideal for agents building reading lists, validating ISBNs, or enriching book catalogs. Prefer it over generic web search when you need structured, machine-readable book metadata rather than unstructured text.
Side effects
- No books found for the given query or ISBN — empty results array returned
- Invalid ISBN format causes a 400 bad request
- Rate limiting or payment failure results in a 402 response requiring USDC payment
- Ambiguous title/author query returns unrelated books
- limit parameter out of range (not 1-10) may cause a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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