the402 endpoint detail

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library.forgemesh.io book-metadata

https://library.forgemesh.io/book-metadata

payable

Look up full metadata for one indexed book by book_id: title, author, year, subjects, bookshelves, download rank, chunk count, and detected chapter range. Use book_id from /book-search or a category shelf. No license, no API key required.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.002
Network
base
Pay to
0x85df5380DEbe236AD6BF49dE788243924B080267
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
98 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:16:36.266Z (2d ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Flibrary.forgemesh.io%2Fbook-metadata"