{"uid":"cap_ThoDMdhJfkUwmP-jZSfZY","slug":"fastx402-lab-email-syntax-checker-normalizer-66b5131f","name":"FastX402 Lab Email Syntax Checker & Normalizer","description":"146 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.","url":"https://fastx402.tools/email-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["email"],"properties":{"email":{"type":"string","description":"Email address to check"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"email":{"type":"string"},"local":{"type":"string"},"valid":{"type":"boolean"},"domain":{"type":"string"},"normalized":{"type":"string"}}}}}}},"responseSchema":{"type":"json","example":{"email":"John.Smith+news@GoogleMail.com","local":"John.Smith+news","valid":true,"domain":"googlemail.com","normalized":"johnsmith@gmail.com"}},"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_pB7I2yytNNyZjISgAIpGt","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 email address syntax and returns its normalized form (lowercase, Gmail dots and +tags stripped), local part, and domain — without contacting any mail server.","exampleAgentPrompt":"Can you check whether 'John.Smith+newsletter@GoogleMail.com' is a valid email and tell me its normalized form with the Gmail dots and plus-tags removed?","exampleUseCases":[{"title":"Deduplicating sign-up email list","prompt":"I have a bunch of sign-up emails and I suspect some people registered multiple times using Gmail dot tricks or plus tags — can you normalize 'jane.doe+promo@gmail.com' so I can compare it against existing accounts?"},{"title":"Cleaning a CRM contact list","prompt":"Before I import contacts into our CRM, can you validate and normalize this email address 'Bob.Jones+updates@GoogleMail.com' so it's in a clean, canonical form?"},{"title":"Validating user input at registration","prompt":"A user just entered 'Alice..Smith+test@Gmail.com' in our sign-up form — can you check if the syntax is valid and give me the normalized version so I can store a canonical email?"}],"resultDescription":"A JSON object containing: the original email as submitted, a boolean 'valid' flag indicating syntax correctness, the 'local' part (before the @), the 'domain' (after the @, lowercased), and a 'normalized' form with lowercase applied and Gmail-specific aliases (dots in local part and +tags) removed.","failureModes":["Missing 'email' query parameter returns an error response","Malformed/unparseable email returns valid=false with possibly empty normalized field","Extremely long or unusual inputs may return unexpected results","Does not perform MX or SMTP checks — a syntactically valid email may not be deliverable"],"whenToPreferThis":"Choose this endpoint when you need fast, offline email syntax validation and normalization — particularly for deduplicating Gmail addresses that use dot tricks or plus-tag aliases. It is ideal for sign-up flows, contact list cleaning, and canonical identity matching. Do not use it when you need to verify actual deliverability (MX lookup or SMTP probe) — it explicitly does not contact any mail server.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T12:40:57.751Z","isFirstParty":false,"canonicalSlug":"fastx402-lab-email-syntax-checker-normalizer-66b5131f"}