{"uid":"cap_HTCO049NVkuG25Kh-NJKN","slug":"x402-format-checker-email-validation-e09cd9fd","name":"x402 Format Checker – Email Validation","description":"Format and checksum validation for IBAN, EU VAT, Polish NIP/REGON/PESEL and email, pay-per-call via x402. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.","url":"https://x402-test.crewofthecaptain.com/api/validate/email?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"value":{"type":"string","maxLength":512}}},"responseSchema":{"type":"json","example":{"type":"email","valid":true,"reason":"ok","normalized":"…"}},"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_MBJvasQ3DCA69XYL7lNFR","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 the format and checksum of an email address, returning validity status, reason, and normalized form, paid per-call via x402 in USDC on Base.","exampleAgentPrompt":"Can you check whether 'john.doe+test@example.co.uk' is a valid, properly formatted email address and give me its normalized form?","exampleUseCases":[{"title":"User registration email gate","prompt":"Before I create this account, check if the email 'jankowalski@@gmail..com' is valid — I want to catch any formatting errors before saving it to the database."},{"title":"Bulk contact list cleanup","prompt":"I have an email address 'info@my-company.org' from a lead form — validate it and give me the normalized version so I can add it to our CRM without issues."},{"title":"Automated form input sanitization","prompt":"Someone just submitted 'Alice.Smith+Newsletter@Example.COM' as their email — is it valid, and what's the canonical normalized version I should store?"}],"resultDescription":"A JSON object containing: 'type' (always 'email'), 'valid' (boolean indicating whether the email passed format and checksum validation), 'reason' (a string explaining the result, e.g. 'ok' or a description of the error), and 'normalized' (the canonicalized/lowercased email string if valid).","failureModes":["Invalid or malformed input string returns valid:false with a reason describing the specific format error","Empty or missing 'value' field may return a 400-level error or valid:false","Payment failure via x402 returns HTTP 402 before validation is attempted","Strings exceeding 512 characters are rejected per schema maxLength constraint"],"whenToPreferThis":"Choose this endpoint when you need lightweight, pay-per-call email format and checksum validation without committing to a subscription-based email verification service. It is ideal for sporadic validation needs, agentic pipelines processing individual records, or cost-sensitive workflows where $0.001 per check is acceptable. It does not perform live mailbox reachability checks (SMTP ping), so prefer a deliverability-focused API if you need to confirm a mailbox actually exists.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:41:04.310Z","isFirstParty":false,"canonicalSlug":"x402-format-checker-email-validation-e09cd9fd"}