{"uid":"cap_L-X6xpuzw_utSk4bDMPFd","slug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-84e6083d","name":"B2A Email Deliverability, MX, SPF & DMARC Verifier","description":"Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/email-validator)","url":"https://preflight.agentdiet.dev/v1/email-validator?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["email"],"properties":{"email":{"type":"string","minLength":1,"description":"Email address to validate for syntax, MX deliverability, and disposable risk"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.005","displayCostAsset":"USD","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":"$0.005/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Kg-UzFajz18DxWaLkarm5","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"preflight.agentdiet.dev","brandSlug":"preflight-agentdiet-dev-mpp","brandBaseUrl":"https://preflight.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record verification.","exampleAgentPrompt":"Can you check whether john.doe@example.com is a real, deliverable email address — specifically if the domain has MX records, isn't a disposable provider, and passes SPF and DMARC checks?","exampleUseCases":[{"title":"Screen registrations for throwaway emails","prompt":"Before I approve this new user signup, check if the email address they provided — tempuser123@mailinator.com — is a disposable or burner address and whether it can actually receive mail."},{"title":"Qualify leads before CRM import","prompt":"I have a lead with the contact email sales@acme-corp.io — can you verify it's a legitimate address with working MX records and not a role account or fake domain before I add it to our CRM?"},{"title":"Audit email domain DNS health","prompt":"Check if the domain behind founder@startupxyz.co has proper SPF and DMARC DNS records configured, and whether it's set up to actually deliver email."}],"resultDescription":"Returns a structured object indicating whether the email passes syntax checks, whether the domain is a known disposable/burner provider, whether it is a role account (e.g. info@, noreply@), and the live DNS lookup results for MX, SPF, and DMARC records — giving a comprehensive deliverability and legitimacy assessment.","failureModes":["Invalid or malformed email string returns a syntax error flag","Domain with no MX records returns deliverability failure","DNS lookup timeout may result in inconclusive MX/SPF/DMARC results","Newly registered domains may not yet appear in disposable provider lists","Private or internal domains may return false negatives on deliverability"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, multi-signal email check that goes beyond simple syntax validation — specifically when you need live DNS MX/SPF/DMARC lookups combined with disposable provider detection and role account flagging in a single call. Ideal for lead qualification, fraud prevention at registration, and pre-send email hygiene at $0.005 per check.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:26:20.498Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-2fe18696"}