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Open Library Book Search
x402
Open Library Book Search 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).
Searches the Open Library catalog for books by title, author, or keyword, returning titles, authors, first publication dates, and ISBNs
Price / call$0.002
Success—
StatusUnknown
How this service works
Book search (Open Library): titles, authors, first published, ISBNs — Genesis402 / UnyKorn Operator Network
Output
Returns a list of book records from Open Library, each containing the book title, author name(s), first published year, and one or more ISBNs. Up to 30 results per call (default 10).
Example use cases
Finding ISBNs for a reading list
“I have a reading list with titles like 'Dune' and 'Foundation' — can you search Open Library for each one and get me their ISBNs and first publication years?”
Researching an author's bibliography
“Search Open Library for all books by Cormac McCarthy and give me up to 20 results with titles, publication dates, and ISBNs.”
Verifying book publication details
“I need to confirm when 'The Hobbit' was first published — can you look it up on Open Library and give me the title, author, first published year, and ISBN?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/research/book-search?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need bibliographic metadata (titles, authors, ISBNs, publication dates) from the Open Library catalog. Ideal for book discovery, reading list enrichment, ISBN lookup, and author research tasks. Prefer this over generic web search when structured book metadata is required.
Side effects
- Query returns no results if the search term is too obscure or misspelled
- Limit parameter out of range (must be 1–30) returns an error
- Some older or obscure books may lack ISBNs in the Open Library catalog
- Network or upstream Open Library API unavailability causes failure
- Missing required 'q' parameter results in a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "book-search",
"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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