{"uid":"cap_vGq-YaoG89akOs9NQOUUF","slug":"x402-format-checker-email-validation-c0938e24","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://validate.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_bFuGG_xgo5JoHOWwps3oC","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 syntax of an email address and returns a validity flag, reason, and normalized form, paid per-call via x402 in USDC.","exampleAgentPrompt":"Can you check whether 'user.name+tag@example.co.uk' is a valid email address and give me its normalized form?","exampleUseCases":[{"title":"User registration email check","prompt":"Before I save this new account, can you verify that 'john.doe@gmail.com' is a properly formatted email address?"},{"title":"Bulk import data quality gate","prompt":"I'm about to import a CSV of contacts — can you validate whether 'info@my-company.org' is a valid email so I can flag bad rows?"},{"title":"Form submission pre-flight validation","prompt":"A user just submitted 'jane@@example..com' as their email in a checkout form — is that actually a valid email address?"}],"resultDescription":"A JSON object with: 'type' (always 'email'), 'valid' (boolean indicating whether the address passes format and syntax checks), 'reason' (string explaining the outcome, e.g. 'ok' or a specific error), and 'normalized' (the canonicalized form of the email address).","failureModes":["Missing or empty 'value' field returns a validation error","Input exceeding 512 characters may be rejected","Malformed JSON body returns a 400-level error","x402 payment failure or insufficient USDC balance returns a 402 Payment Required response","Non-email strings (e.g. IBANs, phone numbers) will return valid:false with an appropriate reason"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-use email format and syntax validator with no subscription required — ideal for low-volume checks, agent workflows, or pipelines where you want to pay only for what you use via crypto microtransaction. Prefer this over heavyweight email deliverability services when you only need format/syntax validation, not MX-record or SMTP-level reachability checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:30:08.698Z","isFirstParty":false,"canonicalSlug":"x402-format-checker-email-validation-c0938e24"}