{"uid":"cap_Q9FK4lmjOAjSlS6SRSftf","slug":"agentshield-live-isbn-checksum-validator-8f9ba051","name":"agentshield.live ISBN Checksum Validator","description":"Call when an agent has an ISBN-10 or ISBN-13 and needs the checksum result. Does not confirm a book or a price.","url":"https://agentshield.live/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":["code"],"properties":{"code":{"type":"string","description":"ISBN-10 or ISBN-13, hyphens allowed."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7SDOhHZ344PvmtdZ7Snen","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates the checksum of an ISBN-10 or ISBN-13 code and returns the verification result","exampleAgentPrompt":"Can you validate the checksum on this ISBN for me — it's 978-3-16-148410-0?","exampleUseCases":[{"title":"Book catalog data quality check","prompt":"I'm importing a list of books and want to make sure the ISBNs are all checksummed correctly before I save them — can you verify 0-306-40615-2 for me?"},{"title":"E-commerce product listing validation","prompt":"Before I publish this product listing, can you confirm that the ISBN 9780306406157 has a valid check digit?"},{"title":"Library system ingestion guard","prompt":"We just scanned a new book with ISBN 0-19-853453-1 — can you verify the checksum is correct before we add it to the catalog?"}],"resultDescription":"Returns the checksum validation result for the provided ISBN-10 or ISBN-13 code, indicating whether the check digit is mathematically valid. Does not confirm existence of the book, its title, or any pricing information.","failureModes":["Missing 'code' query parameter returns an error","Non-ISBN string (wrong length or invalid characters) may return invalid checksum or error","Hyphens are allowed but other separators may cause errors","ISBN-9 or other non-standard formats are not supported"],"whenToPreferThis":"Use this endpoint when you need to verify the mathematical validity of an ISBN-10 or ISBN-13 check digit, for example before storing book data, validating user input, or quality-checking a catalog. Do not use it to look up book metadata, titles, prices, or availability — it only validates the checksum.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:40:04.387Z","isFirstParty":false,"canonicalSlug":"agentshield-live-isbn-checksum-validator-8f9ba051"}