{"uid":"cap_bZ6cEFaVQQUp94sPZ-al-","slug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-3d758a13","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/mx-check)","url":"https://preflight.agentdiet.dev/v1/mx-check?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_6GWQ9QlDuVgH8-6mX67D0","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 presence.","exampleAgentPrompt":"Can you check whether john.doe@acmecorp.com is a real, deliverable email address — verify the syntax, look up live MX records, and flag it if it's a disposable or role account?","exampleUseCases":[{"title":"Signup fraud prevention screening","prompt":"Before creating this account, check if the email address user123@tempmail.io is a real deliverable inbox or a disposable/burner address — I want to block throwaway signups."},{"title":"B2B outreach list hygiene","prompt":"I have a lead email address cto@startupxyz.com — can you verify that it's syntactically valid, the domain has working MX records, and SPF and DMARC are properly configured before I add it to my outreach sequence?"},{"title":"Email infrastructure audit for a domain","prompt":"Can you check the email setup for the domain bigclient.com by validating whether it has live MX, SPF, and DMARC DNS records in place?"}],"resultDescription":"Returns an object containing email syntax validity, whether the provider is a known disposable or burner service, whether the address appears to be a role account (e.g. admin@, support@), and live DNS lookup results for MX, SPF, and DMARC records on the email's domain — together providing a comprehensive deliverability and risk assessment.","failureModes":["Malformed or missing email parameter returns a validation error","DNS timeout or unreachable nameservers may result in incomplete MX/SPF/DMARC results","Newly registered domains may have no DNS records yet, causing false negatives","Disposable provider lists may lag behind newly created burner services","Payment failure via x402 returns HTTP 402 before the check is performed"],"whenToPreferThis":"Choose this endpoint when you need a single API call that combines email syntax checking, disposable/burner provider detection, role account flagging, and live DNS record validation (MX, SPF, DMARC) in one pass. It is particularly well-suited for B2B lead enrichment pipelines, signup fraud prevention, and pre-send deliverability checks where DNS-level verification is required, not just format validation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:22:46.792Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-2fe18696"}