{"uid":"cap_mndkJma0HYR-vVT9Zmw-m","slug":"mailcheck-email-validation-deliverability-78c4733c","name":"Mailcheck Email Validation & Deliverability","description":"Validate any email for deliverability, disposability, and risk. DNS + SMTP verification, disposable domain detection, typo suggestions. Pay-per-call via x402 (USDC on Base).","url":"https://mailcheck.x402tools.xyz/v1/validate?utm_source=zero.xyz","method":"POST","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":["POST"],"type":"string"},"queryParams":{"type":"object","required":["email"],"properties":{"email":{"type":"string","description":"Email address to validate"},"checkSmtp":{"type":"boolean","description":"Whether to perform SMTP handshake (default: true)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"email":{"type":"string"},"score":{"type":"number"},"valid":{"type":"boolean"},"checks":{"type":"object"},"provider":{"type":"string"},"suggestion":{"type":"string","nullable":true}}}}}}},"responseSchema":{"type":"json","example":{"email":"jane.doe@gmail.com","score":92,"valid":true,"checks":{"syntax":true,"catchAll":false,"mxExists":true,"mxAccepts":true,"disposable":false,"roleAccount":false,"freeProvider":true},"provider":"Google","suggestion":null}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZLiLPwNRmV89XYjjN8KuH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates an email address for deliverability, disposability, and risk using DNS/MX lookup, SMTP verification, and typo suggestions","exampleAgentPrompt":"Can you check whether jane.doe@gmial.com is a real, deliverable email address — including running the SMTP handshake — and let me know if there's a typo or if it's a disposable address?","exampleUseCases":null,"resultDescription":"Returns a JSON object with the original email, a numeric deliverability score (0–100), a boolean validity flag, per-check results (syntax, MX exists, MX accepts, catch-all, disposable, role account, free provider), the detected email provider name, and an optional corrected-spelling suggestion if a typo is detected.","failureModes":["Missing email parameter returns validation error","Invalid email format may still be processed but returns syntax:false","SMTP check may time out for slow mail servers, returning partial results","Disposable domain database may not cover every known throwaway provider","Catch-all domains always return mxAccepts:true regardless of real deliverability","Payment failure via x402 prevents the call from completing"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, multi-layer email validation that goes beyond simple regex — specifically when you need SMTP-level deliverability confirmation, disposable domain detection, role-account flagging, and typo suggestions in a single pay-per-call API with no subscription required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T12:25:45.059Z","isFirstParty":false,"canonicalSlug":"mailcheck-email-validation-deliverability-78c4733c"}