{"uid":"cap_lA_z_MZ4CHVUqfc7tWOA-","slug":"sindri-checksummed-identifier-generator-dde334c3","name":"Sindri Checksummed Identifier Generator","description":"Checksummed-identifier-format generator API. Generates a structurally valid isbn, upc, vin, or imei, each computed with its real check-digit algorithm. vin and imei take no arguments. Accepts optional locale (default en_US).","url":"https://x402.outpimp.com/generateChecksumFormat","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"args":{"type":"object","description":"Method-specific options, e.g. {\"variant\":13} for isbn. Not accepted for vin/imei."},"field":{"enum":["isbn","upc","vin","imei"],"type":"string","description":"Which checksummed identifier format to generate."},"locale":{"type":"string","default":"en_US","description":"Locale code, e.g. \"en_US\", \"de\"."}}},"responseSchema":null,"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":null,"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_J7xZGEH37NgW1NxG72C_j","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":"Generates structurally valid checksummed identifiers (ISBN, UPC, VIN, IMEI) with real check-digit algorithms","exampleAgentPrompt":"Generate a valid ISBN-13 for me — I need a structurally correct book identifier with a real check digit, using the isbn field with variant 13.","exampleUseCases":[{"title":"Test data for e-commerce catalog","prompt":"Generate a valid UPC code I can use as test data for my product catalog — needs to be structurally correct with a real check digit."},{"title":"Fake VIN for automotive app testing","prompt":"Can you generate a valid VIN number for me? I need a realistic vehicle identification number to test my automotive app."},{"title":"Mock IMEI for mobile device testing","prompt":"I need a valid IMEI number to use in my mobile device registration test suite — generate one with the correct check digit."}],"resultDescription":"Returns a structurally valid checksummed identifier string (e.g. an ISBN-13, 12-digit UPC, 17-character VIN, or 15-digit IMEI) computed using the real check-digit algorithm for that format. The output passes standard validation checks for the chosen identifier type.","failureModes":["Invalid field enum value returns an error","Unsupported locale may fall back to en_US or error","Passing args to vin or imei (which accept no arguments) may be ignored or cause an error","Payment failure (402) if USDC balance is insufficient","Network timeout on rare occasions"],"whenToPreferThis":"Choose this endpoint when you need a single, structurally valid checksummed identifier (ISBN, UPC, VIN, or IMEI) with a correctly computed check digit — ideal for test data generation, mocking, QA pipelines, or any scenario requiring a realistic-looking but synthetic identifier. Prefer this over hand-rolling check digit logic or using random strings that fail validation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:39:22.419Z","isFirstParty":false}