{"uid":"cap_zddDKV8VKpyaApNapaVpJ","slug":"code402-e-164-phone-number-validator-cad2e3a1","name":"code402 E.164 Phone Number 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/e164-check/call?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"object","required":["phone"],"properties":{"phone":{"type":"string","description":"International phone number, e.g. +14155552671."}}}}},"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_iUSk2rPgoZMoVH06K6FXJ","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 E.164-formatted international phone numbers offline and deterministically, returning validity, reason, country, and normalized form","exampleAgentPrompt":"Can you check whether +14155552671 is a valid E.164 phone number and tell me what country it belongs to?","exampleUseCases":[{"title":"Phone number cleanup before SMS campaign","prompt":"I have a list of customer phone numbers and I need to check if +447911123456 is a properly formatted E.164 number before I send out an SMS blast — can you validate it and tell me what country it's from?"},{"title":"User registration input validation","prompt":"A user just entered +861012345678 as their phone number during signup — is that a valid E.164 number, and what country does it belong to?"},{"title":"CRM data quality audit","prompt":"I'm auditing our CRM and need to check if +33612345678 is a valid international phone number in E.164 format — give me the validation result and the normalized form."}],"resultDescription":"Returns a JSON object with: valid (boolean indicating whether the number passes E.164 validation), reason (human-readable explanation of the result), scope (indicates whether validation is checksum-based or format-only), country (ISO country code inferred from the number), normalized (canonical E.164 representation of the number), and tool (identifier for the tool used).","failureModes":["Malformed or missing phone number input returns valid: false with a reason explaining the format issue","Numbers with valid format but unassigned country codes may return valid: false","Non-E.164 strings (e.g. national formats without +) may fail format checks","Rate limit exceeded beyond 3 free daily calls without payment results in HTTP 402","Network connectivity issues may prevent reaching the endpoint"],"whenToPreferThis":"Choose this endpoint when you need fast, offline, deterministic phone number validation with no ML or external lookups — ideal for data pipelines, form validation, and CRM cleanup where privacy and consistency matter. Prefer it over live telecom APIs when you don't need to verify whether a number is actually active or reachable, only that it's correctly structured.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:39:51.965Z","isFirstParty":false,"canonicalSlug":"code402-e-164-phone-number-validator-cad2e3a1"}