{"uid":"cap_mvS6RKM0kx4InqF9Dajm0","slug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-8e563955","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-check)","url":"https://prompt-guard.agentdiet.dev/v1/email-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_1jIl1M15Y17SVI231o_CG","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 domain status, role account detection, and live DNS MX, SPF, and DMARC record verification.","exampleAgentPrompt":"Can you check whether john.doe@acmecorp.com is a real, deliverable email — I want to know if the domain has valid MX records, whether it passes SPF and DMARC, and if it looks like a disposable or role account?","exampleUseCases":[{"title":"Pre-send email list hygiene","prompt":"Before I send this marketing campaign, check if the signup email address mike.jones@tempmail.xyz is legitimate — I need to know if it's a burner address and whether the domain actually has MX records set up."},{"title":"Lead enrichment before CRM entry","prompt":"I'm about to add contact@startupxyz.com to our CRM — can you verify it's a real deliverable address, not a role or disposable account, and that their domain has proper SPF and DMARC records?"},{"title":"Fraud detection during user onboarding","prompt":"A new user just signed up with the email noreply@guerrillamail.com — can you check if this is a disposable or role account and whether the domain has valid MX records before I let them into the platform?"}],"resultDescription":"Returns a structured object indicating email syntax validity, whether the domain uses a known disposable/burner provider, whether it is a role-based address (e.g. info@, admin@), and live DNS lookup results for MX, SPF, and DMARC records — helping determine overall deliverability and trustworthiness of the address.","failureModes":["Missing or empty email parameter returns a validation error","Malformed email string may return syntax-invalid without DNS checks","DNS lookup timeout for obscure or slow-responding domains may produce incomplete MX/SPF/DMARC results","Non-existent TLD or domain returns no MX records found","Payment not fulfilled (HTTP 402) blocks response if x402 payment not completed"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call email check covering syntax, disposable provider detection, role account identification, and live DNS verification of MX, SPF, and DMARC records — particularly for B2B lead validation, fraud prevention during user signup, or pre-send list hygiene in marketing workflows. Prefer it over simple syntax-only validators when DNS deliverability and email security posture (SPF/DMARC) matter to your use case.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:22:53.079Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-f0765224"}