{"uid":"cap_KLeGPbZATqe6WHdWhVQy6","slug":"phone-number-e-164-format-validator-948eff34","name":"Phone Number E.164 Format Validator","description":"Call when an agent needs whether a phone number matches E.164. No carrier lookup. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-phone-e164 first.","url":"https://agentshelf.syntexa.ch/v1/check-phone-e164?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"description":"JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."},"value":{"type":"string","examples":["+14155552671"],"maxLength":20000,"minLength":1,"description":"Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."},"schema":{"description":"JSON Schema document for schema-check SKUs. Omit it on string checks."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9PrKwc62VWYbSi0mSqWHR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a phone number string conforms to the E.164 international format standard (no carrier lookup)","exampleAgentPrompt":"Can you check if the phone number +14155552671 is correctly formatted in E.164 — just format validation, no carrier lookup needed?","exampleUseCases":[{"title":"Form submission phone validation","prompt":"Before I save this user's profile, can you verify that their phone number +442071838750 is valid E.164 format?"},{"title":"CRM data cleanup check","prompt":"I have a phone number from our database — +33123456789 — can you tell me if it's properly E.164 formatted so I know if it needs fixing?"},{"title":"Pre-SMS pipeline validation","prompt":"We're about to queue a message to +819012345678 — quickly check if that number is E.164 compliant before we send it out."}],"resultDescription":"A boolean or structured response indicating whether the provided phone number string conforms to E.164 format (starts with +, followed by up to 15 digits, correct length and structure). No carrier or line-type information is returned.","failureModes":["Empty or missing value field returns an error","Value exceeding 20000 characters rejected","Malformed request body returns 400","Payment not attached or insufficient USDC returns 402","Network timeout or service unavailability returns 5xx"],"whenToPreferThis":"Choose this endpoint when you only need to verify that a phone number string is structurally valid per the E.164 standard and do not need carrier information, line type, or number portability data. It is the cheapest option at $0.001 USDC per call. Always try the free sandbox endpoint POST /v1/sandbox/check-phone-e164 first during development or testing before using this paid endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:07.370Z","isFirstParty":false,"canonicalSlug":"phone-number-e-164-format-validator-948eff34"}