{"uid":"cap_M7h07aGdZc-vboDyiVIfT","slug":"ein-format-check-75f08406","name":"EIN Format Check","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/ein-format-check/call?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"object","required":["ein"],"properties":{"ein":{"type":"string","description":"US EIN, 9 digits; dashes/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_tPqOtpxWjTTU0QxTsBRgL","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 the format of a US Employer Identification Number (EIN) using offline deterministic rules, returning validity, reason, and normalized form.","exampleAgentPrompt":"Can you check whether 12-3456789 is a properly formatted US Employer Identification Number?","exampleUseCases":[{"title":"Pre-filing EIN validation for payroll","prompt":"Before I submit payroll taxes, check that this EIN is correctly formatted: 98-7654321."},{"title":"Onboarding vendor identity check","prompt":"We're onboarding a new vendor who gave us their EIN as 00-1234567 — can you verify that's a valid EIN format?"},{"title":"Bulk data cleanup for business registry","prompt":"I have an EIN from an old database record — '123456789' — can you tell me if it's a valid format and what the normalized version looks like?"}],"resultDescription":"A JSON object with a boolean 'valid' field, a human-readable 'reason' explaining the result, a 'scope' field indicating whether the check is format-only or checksum-verifiable, a 'normalized' string with the standardized EIN format, and a 'country' field. EIN is a format-only check (no checksum), so 'scope' will reflect that.","failureModes":["Malformed or missing input returns valid:false with a descriptive reason","Non-EIN identifier submitted returns an error or invalid result","Payment failure via x402 results in HTTP 402 before processing","Rate limit exceeded beyond 3 free daily calls without payment"],"whenToPreferThis":"Choose this endpoint when you need a fast, offline, deterministic EIN format check with no external lookups or ML — ideal for agent pipelines doing KYB onboarding, tax form validation, or data cleanup where low latency and auditability (signed receipts) matter. It is not a registry lookup and will not confirm the EIN belongs to a real business.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:43:10.224Z","isFirstParty":false,"canonicalSlug":"ein-format-check-75f08406"}