{"uid":"cap_jgfgFHPeVKLeXnFErycgJ","slug":"agentshelf-isbn-validator-af12cb24","name":"AgentShelf ISBN Validator","description":"Call when an agent needs whether a string is a valid ISBN-10 or ISBN-13. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/check-isbn first.","url":"https://agentshelf.syntexa.ch/v1/check-isbn?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"description":"JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."},"value":{"type":"string","examples":["9780306406157"],"maxLength":20000,"minLength":1,"description":"Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."},"schema":{"description":"JSON Schema document for schema-check SKUs. Omit it on string checks."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_02N_Q6bDhWbLAcWDch6XW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a given string is a correctly formatted ISBN-10 or ISBN-13 identifier","exampleAgentPrompt":"Can you check whether '978-3-16-148410-0' is a valid ISBN — either ISBN-10 or ISBN-13?","exampleUseCases":[{"title":"Book catalog data quality check","prompt":"I'm about to add this book to our catalog — can you verify that '0-306-40615-2' is a valid ISBN before I save it?"},{"title":"User-submitted ISBN validation","prompt":"A customer entered '9780141036144' as their book's ISBN on our platform — is that a real valid ISBN-13?"},{"title":"Automated inventory import validation","prompt":"Before I import this batch entry, check whether '0195153448' passes ISBN-10 validation so I can flag it if it's wrong."}],"resultDescription":"A boolean or structured response indicating whether the submitted string is a valid ISBN-10 or ISBN-13, along with which format matched (if valid)","failureModes":["Empty or missing 'value' field returns an error","String longer than 20,000 characters rejected","Malformed request body returns 400","Network timeout or service unavailability returns 5xx","Non-ISBN strings (e.g. random numbers) return invalid result without error"],"whenToPreferThis":"Use this endpoint when you need a quick, cheap, authoritative check on whether a string conforms to ISBN-10 or ISBN-13 checksum rules — especially useful in book catalog ingestion pipelines, user input validation, or e-commerce workflows. Prefer the free sandbox endpoint (/v1/sandbox/check-isbn) for testing; use this paid endpoint in production when reliability and uptime matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:52:34.183Z","isFirstParty":false,"canonicalSlug":"agentshelf-isbn-validator-af12cb24"}