{"uid":"cap_XxLA4grr9mwFkQYAbc4YB","slug":"klymax402-sms-validator-phone-number-validation-api-773d2e20","name":"klymax402 SMS Validator — Phone Number Validation API","description":"One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.","url":"https://klymax402.com/api/sms-validator/api/validate","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"phone":{"type":"string","description":"Phone number with country code (e.g. +14155551234)"},"countryCode":{"type":"string","description":"ISO 3166-1 alpha-2 country code hint (e.g. US, FR, GB)"}}},"responseSchema":{"type":"json","example":{"e164":"example","phone":"example","valid":true,"country":{},"numberType":"example","smsCapable":true,"nationalNumber":"example"}},"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_ZWnd3tOcKKnVAzPAl8Bn6","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 phone number, checks its SMS capability, determines its type, and returns normalized E.164 format along with country metadata.","exampleAgentPrompt":"Can you check whether +14155551234 is a valid phone number, confirm it can receive SMS messages, and tell me its type and country?","exampleUseCases":[{"title":"OTP delivery pre-check","prompt":"Before I send a one-time password, can you validate that +33612345678 is a real mobile number that can receive SMS? I want to make sure it's SMS capable before wasting credits."},{"title":"User registration form validation","prompt":"A user just signed up with the phone number +447911123456 and country code GB — can you verify it's a valid number and tell me what type it is?"},{"title":"International number normalization","prompt":"I have a phone number entered as 06 12 34 56 78 from France — can you normalize it to E.164 format and confirm it's a valid SMS-capable mobile number?"}],"resultDescription":"A JSON object containing the E.164-normalized phone number, the national number, a boolean validity flag, a boolean SMS capability flag, the number type (e.g. mobile, landline, VoIP), and a country metadata object with details about the number's origin country.","failureModes":["Invalid or unparseable phone number format returns valid: false with no normalized output","Missing or incorrect country code hint may cause misclassification of ambiguous numbers","Unsupported country or number range may yield incomplete country metadata","Malformed input (non-numeric characters, missing '+') may result in a parsing error or invalid response","Rate limits or payment failure (insufficient USDC) may return a 402 Payment Required error"],"whenToPreferThis":"Choose this endpoint when you need to verify, normalize, and enrich a phone number — especially to confirm SMS deliverability before sending messages or OTPs. It is ideal for pre-validating user-submitted phone numbers in registration flows, cleaning up phone number datasets, or routing logic that depends on number type (mobile vs. landline). Prefer it over a pure format-checker when you need both structural validation and SMS capability confirmation in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:40:20.630Z","isFirstParty":false}