{"uid":"cap_XRYLVmTSc23hiIJk6DXap","slug":"keyronne-com-book-isbn-lookup-8cdf145a","name":"keyronne.com Book ISBN Lookup","description":"Look up a book by ISBN (10 or 13 digit): title, subtitle, authors, publishers, publish date, page count, subjects, and cover image. Validates the ISBN check digit first (rejecting typos unpaid) and returns both ISBN forms. Data from Open Library; attributed in every response. POST a JSON body like: {\"isbn\":\"9780140328721\"}","url":"https://keyronne.com/api/book","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"isbn":{"type":"string","description":"A 10- or 13-digit ISBN; hyphens and spaces are ignored."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_q24HKXVN2HjRm6CHBtTsl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Look up book metadata by ISBN (10 or 13 digit), returning title, authors, publishers, publish date, page count, subjects, and cover image from Open Library","exampleAgentPrompt":"Can you look up the book with ISBN 9780140328721 and tell me the title, authors, and publisher?","exampleUseCases":null,"resultDescription":"Returns a JSON object with the book's title, subtitle, authors list, publishers list, publish date, page count, subject tags, cover image URL, and both ISBN-10 and ISBN-13 forms. Also confirms the ISBN check digit is valid. Data is sourced from Open Library with attribution included in every response.","failureModes":["Invalid ISBN check digit — returns rejection error before making data lookup","ISBN not found in Open Library — returns not-found response","Malformed input (non-numeric characters after stripping hyphens/spaces) — returns validation error","ISBN has wrong length (not 10 or 13 digits) — returns format error","Network timeout reaching Open Library — returns upstream error"],"whenToPreferThis":"Use this endpoint when you need structured bibliographic metadata for a known ISBN, especially when you also want ISBN check-digit validation before lookup. Prefer this over general web search when you need clean structured fields (authors, publishers, subjects, cover image) rather than free-text results. Good for enriching catalogs, verifying book data, or resolving an ISBN into human-readable metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:42:56.855Z","isFirstParty":false}