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ISBN Lookup: Title, Publisher, Date, Pages
x402
ISBN Lookup: Title, Publisher, Date, Pages is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-03).
Looks up book metadata (title, publisher, publication date, page count) by ISBN-10 or ISBN-13
Price / call$0.002
Success—
StatusUnknown
How this service works
ISBN lookup: title, publisher, date, pages — Genesis402 / UnyKorn Operator Network
Output
Returns bibliographic metadata for the given ISBN including the book's title, publisher name, publication date, and total page count.
Example use cases
Verify book details before purchase
“I have the ISBN 0140449116 — can you tell me the title, who published it, when it came out, and how many pages it is?”
Enrich a reading list spreadsheet
“I'm building a reading list and need to fill in the metadata for these books. Start with ISBN 9780743273565 — what's the full title, publisher, publication date, and page count?”
Validate ISBN for library catalog
“We just received a shipment and I need to verify what this book is — the ISBN on the spine is 9780062316097. What title, publisher, and publication year does that correspond to?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/research/isbn?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured bibliographic metadata (title, publisher, date, pages) for a known ISBN and want a fast, low-cost ($0.002) single-book lookup. Prefer this over broader book search APIs when you already have the ISBN and just need to resolve it to human-readable metadata. Good for enriching datasets, validating catalog entries, or answering user questions about a specific book.
Side effects
- ISBN not found in database — returns empty or error response
- Malformed ISBN (wrong length or invalid check digit) — validation error
- ISBN-10 vs ISBN-13 format mismatch may return no results depending on normalization
- Out-of-print or obscure titles may have incomplete metadata (missing page count or publisher)
- Network timeout or service unavailability — HTTP 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "isbn-lookup",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.002,
"receipt_id": "g402-<16hex>"
},
"sources": [
{
"ok": true,
"name": "<source>"
}
],
"limitations": "<text>",
"generated_at": "<iso time>",
"evidence_hash": "sha256:<64hex>"
}
}Tags
x402
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