{"uid":"cap_n0uD2uMzAUxSO4QpE976f","slug":"code402-isin-validator-d9efaa2f","name":"code402 ISIN Validator","description":"Offline deterministic checks (no ML, no scraping) for business identifiers and rental due-diligence, paid per call via x402 (gasless EIP-3009 USDC on Base). Checksum-verifiable (IBAN, LEI, VAT, ABA, ISBN, SEDOL…) vs format-only (EIN, IFSC, SWIFT/BIC…) — every response returns a scope field. Non-custodial, signed receipts. First 3 calls/day free.","url":"https://hcrb.in/v1/tools/isin-check/call?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"object","required":["isin"],"properties":{"isin":{"type":"string","description":"12-character ISIN: 2-letter country code + 9 alphanumerics + check digit; spaces allowed."}}}}},"responseSchema":{"type":"json","schema":{"type":"object","required":["valid","reason"],"properties":{"tool":{"type":"string"},"scope":{"type":"string"},"valid":{"type":"boolean"},"reason":{"type":"string"},"country":{"type":"string"},"normalized":{"type":"string"}}},"example":{"valid":true,"reason":"checksum valid"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/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_fHAeqh3kgoLjoZrIMYq66","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 an ISIN (International Securities Identification Number) using offline deterministic checksum verification, returning validity, reason, country, and normalized form.","exampleAgentPrompt":"Can you check whether the ISIN US0378331005 is valid — specifically confirm the checksum passes and tell me which country it belongs to?","exampleUseCases":[{"title":"Pre-trade securities identifier check","prompt":"Before we submit this order, can you verify that the ISIN GB0002634946 is valid and properly formed, including checksum?"},{"title":"Compliance data pipeline enrichment","prompt":"I have an ISIN DE0005140008 from a third-party data feed — can you confirm it's a legitimate identifier and tell me what country it's registered in?"},{"title":"User-submitted ISIN sanitization","prompt":"A user just entered the ISIN FR0000131104 on our platform — can you validate it and return the normalized canonical form so we can store it correctly?"}],"resultDescription":"Returns a JSON object with: `valid` (boolean indicating whether the ISIN passes checksum), `reason` (human-readable explanation of why valid or not), `scope` (indicating checksum-verifiable vs format-only), `country` (ISO country code extracted from the ISIN prefix), and `normalized` (canonical form of the identifier). All checks are performed offline with no ML or external lookups.","failureModes":["Malformed or missing ISIN input returns valid=false with a descriptive reason","ISIN with wrong length or non-alphanumeric characters fails format check before checksum","Payment failure via x402 returns HTTP 402 before any validation is attempted","Ambiguous or unsupported prefix may return scope as format-only rather than checksum-verifiable"],"whenToPreferThis":"Choose this endpoint when you need fast, offline, deterministic ISIN validation with checksum verification — no network scraping, no ML, no registry lookup required. Ideal for compliance pipelines, pre-trade checks, and data ingestion workflows where you need a cryptographically-accountable signed receipt per call and pay-per-use micro-pricing ($0.005 USDC). First 3 calls/day are free.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:34:23.218Z","isFirstParty":false,"canonicalSlug":"code402-isin-validator-d9efaa2f"}