Data

ISBN → book metadata API

Look up a book by ISBN (10 or 13 digit) via Open Library: title, authors, publisher, publish date, page count, subjects, cover. A catalog lookup an agent can't recall reliably. Answers 'details for this ISBN', 'what book is this', 'who wrote ISBN X', 'how many pages'.

Price$0.01per request

MethodPOST

Route/v1/data/isbn

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache86400s public

dataisbnbookopenlibrarybibliographicauthorpublisherreference

API URLhttps://x402.hexl.dev/v1/data/isbn

Integration docs

Example request

{
  "isbn": "9780140328721"
}

Example response

{
  "isbn": "9780140328721",
  "title": "Fantastic Mr Fox",
  "authors": [
    "Roald Dahl"
  ],
  "publishers": [
    "Puffin"
  ],
  "publishDate": "2009",
  "pages": 96,
  "subjects": [
    "Foxes",
    "Fiction"
  ],
  "cover": "https://covers.openlibrary.org/…"
}

Input schema

{
  "type": "object",
  "required": [
    "isbn"
  ],
  "properties": {
    "isbn": {
      "type": "string",
      "examples": [
        "9780140328721"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}