{"uid":"cap_Ikr-0pvmvV9n0narQZ_En","slug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2398c594","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://prompt-guard.agentdiet.dev/v1/email)","url":"https://prompt-guard.agentdiet.dev/v1/email?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_JSbPA2CdfHcq4swAuPRAm","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX/SPF/DMARC record checks.","exampleAgentPrompt":"Can you check whether jane.doe@tempmail.io is a real, deliverable email address — specifically whether it has valid MX records, passes SPF and DMARC checks, and isn't a disposable or role-based account?","exampleUseCases":[{"title":"Screening sign-up emails for fake accounts","prompt":"Before we let this user into our platform, can you verify that the email they signed up with — user4821@guerrillamail.com — is not a burner or disposable address and actually has working MX records?"},{"title":"B2B lead list email hygiene check","prompt":"I have a lead I'm about to email: cto@acmecorp.io — can you confirm the email is syntactically valid, not a role account, and that the domain has proper MX, SPF, and DMARC records set up before I reach out?"},{"title":"Pre-send deliverability audit for outreach","prompt":"We're about to send a cold outreach to info@startupxyz.co — can you check if that email will actually be deliverable, flag whether it's a role address, and tell me if their domain's DMARC and SPF are configured?"}],"resultDescription":"Returns a structured object indicating whether the email address is syntactically valid, whether the domain has live MX records capable of receiving mail, whether the address belongs to a known disposable/burner email provider, whether it is a role-based account (e.g. admin@, info@), and the presence and validity of SPF and DMARC DNS records on the domain.","failureModes":["Malformed or missing email input returns a validation error","DNS lookup timeouts may occur for domains with slow or unresponsive nameservers","Newly registered domains may not yet have propagated MX/SPF/DMARC records","Some disposable providers may not be in the known blocklist and could be missed","Payment failure via x402 will block the call if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a single, comprehensive email validation that combines syntax checking, DNS MX/SPF/DMARC live lookups, disposable provider detection, and role-account flagging in one call — especially in agent workflows that charge per-use via x402 micropayments and need fast, reliable verdicts before sending emails or admitting users.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:30:31.192Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-f0765224"}