{"uid":"cap_52h3AIpoPlCbmCqCjdVlL","slug":"gocreative-luhn-checksum-validator-21e1fdc4","name":"GoCreative Luhn Checksum Validator","description":"Keyless, pay-per-call compliance & regulated-data API for AI agents — OFAC wallet + sanctions/PEP + KYB screening, SEC filings, FRED economics, FDA recalls, federal awards, plus continuous monitoring. USDC on Base/Solana via x402, native MCP. No API key, no signup.","url":"https://api.gocreativeai.com/v1/validate/luhn/%7Barg%7D","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","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":["input"],"properties":{"input":{"type":"string","description":"endpoint argument"}}}},"additionalProperties":false}}},"responseSchema":null,"example":{"request":{"arg":"4532015112830366"},"response":{"valid":true,"source":"Luhn checksum","card_brand":"Visa","number_length":16}},"exampleRequest":{"arg":"4532015112830366"},"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wEpO1TPPckzSsp42bREPt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a numeric string using the Luhn algorithm and returns whether it's valid, along with detected card brand and number length","exampleAgentPrompt":"Can you check if the card number 4532015112830366 is valid — does it pass the Luhn checksum, and what card brand is it?","exampleUseCases":null,"resultDescription":"Returns a JSON object with a boolean 'valid' field, the source algorithm ('Luhn checksum'), detected 'card_brand' (e.g. Visa, Mastercard), and 'number_length' (e.g. 16)","failureModes":["Non-numeric input may return an error or invalid result","Empty or missing 'input' query parameter returns a 400 error","Very long or very short strings may not match any known card brand","Network or payment failure if USDC balance is insufficient for the $0.005 fee"],"whenToPreferThis":"Use this endpoint when you need to validate a single card number's Luhn checksum and simultaneously identify the card brand in one call, without requiring an API key or signup, paying only $0.005 USDC per call via x402 on Base","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-08T19:12:48.029Z","isFirstParty":false}