{"uid":"cap_Pk3cLB9ieiMxa-6rMWSuN","slug":"email-address-validation-and-domain-mail-check-0e11b8c3","name":"Email Address Validation and Domain Mail Check","description":"Email address screen: syntax, whether its domain accepts mail (MX), role account and known disposable domain flags.","url":"https://domain-dns.x402tookit.com/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":{"asOf":{"type":["null","string"]},"hasMx":{"type":["boolean","null"]},"local":{"type":["null","string"]},"domain":{"type":["null","string"]},"nullMx":{"type":["boolean","null"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"sourceUrl":{"type":["null","string"]},"disclaimer":{"type":["null","string"]},"implicitMx":{"type":["boolean","null"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"roleAccount":{"type":["boolean","null"]},"syntaxValid":{"type":["boolean","null"]},"domainExists":{"type":["boolean","null"]},"disposableDomain":{"type":["boolean","null"]}}}}}}},"responseSchema":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":"unknown","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_hzy7a-LWc-Co7o2JWitHA","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 syntax correctness, domain MX record existence, role account status, and disposable domain detection.","exampleAgentPrompt":"Can you check whether john.doe@tempmail.org is a valid, deliverable email — I want to know if it has proper MX records, whether it's a disposable or role-based address, and if the syntax is correct?","exampleUseCases":[{"title":"Signup form email screening","prompt":"Before we accept this registration, check if the email address user@guerrillamail.com is deliverable — flag it if it's disposable or a role account, and verify the domain actually accepts mail."},{"title":"CRM lead quality check","prompt":"I have a new lead who gave us sales@somedomain.biz — can you verify whether that email address is syntactically valid, whether the domain has MX records, and whether it's a role-based address?"},{"title":"Bounce prevention before bulk send","prompt":"We're about to send a campaign to noreply@example.net — can you quickly screen that email address to see if it passes syntax checks, has working mail servers, and isn't a disposable or role-based inbox?"}],"resultDescription":"Returns a structured verdict including: whether the email syntax is valid, whether the domain exists and has MX records, whether it is a null-MX or implicit-MX domain, whether the address is a role account (e.g. admin@, info@), whether the domain is a known disposable provider, a human-readable summary and list of reasons, and a timestamp indicating data freshness.","failureModes":["Missing 'email' query parameter returns an error","Malformed email string may return syntaxValid=false with no further checks","DNS lookup failures may degrade MX resolution results with degraded=true","Unknown or very new domains may have incomplete RDAP/DNS data","Disposable domain lists may not be exhaustive for newly created throwaway services"],"whenToPreferThis":"Choose this endpoint when you need a combined, single-call check of email syntax, domain MX availability, role account detection, and disposable domain flagging — rather than calling separate DNS lookup and syntax validation tools individually. Ideal for pre-signup screening, lead validation, or bounce prevention workflows where you need a clear pass/fail verdict with reasons.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T18:49:32.657Z","isFirstParty":false,"canonicalSlug":"email-address-validation-and-domain-mail-check-0e11b8c3"}