{"uid":"cap_jgbuUOS2wK6gYLqggyFvO","slug":"isbn-validation-api-2bdbe84d","name":"ISBN Validation API","description":"ISBN validation: ISBN-10 and ISBN-13 check digits, with automatic ISBN-10 to ISBN-13 conversion for valid inputs.","url":"https://api.aventtech.com/validate/isbn?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["isbn"],"properties":{"isbn":{"type":"string","description":"ISBN-10 or ISBN-13, hyphens/spaces allowed"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"kind":"ISBN-13","valid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":{"p10Cents":"1.0000","medianCents":"1.0000","p90Cents":"1.0000","minCents":"1.0000","maxCents":"1.0000","p95Cents":"1.0000","sampleCount":1,"varies":false,"failureChargeRate":1},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9gxYzukkopNN18IBLOhUU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates ISBN-10 or ISBN-13 numbers, returning whether the identifier is valid and its kind","exampleAgentPrompt":"Can you check whether the ISBN 978-3-16-148410-0 is valid and tell me if it's an ISBN-10 or ISBN-13?","exampleUseCases":[{"title":"Verify book ISBNs for online catalog","prompt":"I'm uploading a bunch of books to our store. Can you validate each of these ISBNs and let me know which ones are actually valid before I list them?"},{"title":"Convert and validate ISBN formats","prompt":"We have some older ISBN-10 codes in our inventory system. Can you check if they're valid and convert them to ISBN-13 format so we can sync with our distributor?"},{"title":"Catch ISBN errors during data entry","prompt":"My team manually entered ISBNs from book jackets into our database. Can you scan through and flag any that don't pass validation so we can fix the typos?"}],"resultDescription":"A JSON object with 'kind' (e.g. 'ISBN-13' or 'ISBN-10') and 'valid' (boolean) indicating whether the provided ISBN passes structural and check-digit validation.","failureModes":["Missing 'isbn' query parameter returns error","Non-ISBN string (letters, wrong length) returns valid:false","Network timeout or server error returns HTTP 5xx","Malformed request schema returns HTTP 400"],"whenToPreferThis":"Use this endpoint when you need to validate a book ISBN (ISBN-10 or ISBN-13) including check-digit verification, and need to identify which ISBN format is used. Prefer this over generic barcode validators (e.g. GTIN/EAN) when the identifier is specifically a book ISBN and format classification is needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:36:21.044Z","isFirstParty":false,"canonicalSlug":"isbn-validation-api-2bdbe84d"}