{"uid":"cap_oRGPHTSS0Kv5FkcQJokmI","slug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-055df6f9","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-deliverability-verifier)","url":"https://preflight.agentdiet.dev/v1/mx-deliverability-verifier?utm_source=zero.xyz","method":"POST","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_RVSTpFWJb6-pTjFU1JN4r","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 availability.","exampleAgentPrompt":"Can you check whether john.smith@example.com is a real, deliverable email address — specifically whether it's from a disposable provider, has valid MX records, and passes SPF and DMARC checks?","exampleUseCases":[{"title":"Signup fraud prevention filter","prompt":"Before we create an account for the user who just registered with throwaway99@mailinator.com, can you check if that email is from a disposable or burner provider and whether it has live MX records?"},{"title":"B2B lead list email hygiene","prompt":"I have a sales lead with the email contact@acmecorp.io — can you verify it's deliverable, not a role account, and that acmecorp.io has proper SPF and DMARC records set up?"},{"title":"Cold outreach deliverability check","prompt":"Before I send a cold email campaign, can you validate ceo@startupxyz.com to confirm the domain has working MX records, passes SPF and DMARC, and isn't a catch-all or role address?"}],"resultDescription":"Returns a structured object indicating whether the email address passes syntax validation, whether the domain is a known disposable/burner provider, whether the address appears to be a role account (e.g. admin@, support@), and the live DNS check results for MX, SPF, and DMARC records — giving a complete deliverability picture.","failureModes":["Malformed or empty email input returns a validation error","DNS lookup timeouts may cause MX/SPF/DMARC checks to fail or return incomplete results","Newly registered domains may not yet have propagated DNS records, leading to false negatives","Disposable provider lists may not cover all burner services, causing some to pass undetected","Role account detection relies on heuristics and may have false positives for uncommon prefixes"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call email verification that covers syntax, disposable provider detection, role account flagging, and live DNS checks for MX, SPF, and DMARC — rather than a basic format check alone. It is especially valuable in signup flows, lead enrichment pipelines, and pre-send deliverability audits where bounce risk and fraud prevention matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:31:49.330Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-verifier-2fe18696"}