{"uid":"cap_FxzGnfCRc1jwfCGJv-00i","slug":"mcp-security-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-7790279e","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://mcp-security.agentdiet.dev/v1/email-validator)","url":"https://mcp-security.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_zJWW1oJcRtE51yzZ7EBId","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"mcp-security.agentdiet.dev","brandSlug":"mcp-security-agentdiet-dev-mpp","brandBaseUrl":"https://mcp-security.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 presence.","exampleAgentPrompt":"Can you check whether john.doe@example.com is a real, deliverable email address — specifically whether it passes syntax checks, isn't from a disposable provider, and has valid MX, SPF, and DMARC DNS records?","exampleUseCases":[{"title":"Screening signups for throwaway emails","prompt":"Before we add this new user to our system, can you verify that signup@mailinator.com isn't a burner or disposable email address and actually has real MX records behind it?"},{"title":"Pre-send deliverability audit for outreach","prompt":"I'm about to send a cold outreach campaign — can you validate that ceo@acmecorp.io is syntactically valid, deliverable, and that acmecorp.io has proper SPF and DMARC DNS records configured?"},{"title":"Detecting role accounts in lead data","prompt":"We got a lead with the email info@bigcompany.com — can you check whether it's a role account, whether the domain has MX records, and if it looks like a real deliverable address worth pursuing?"}],"resultDescription":"Returns a structured object indicating whether the email is syntactically valid, whether the domain is 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, along with an overall deliverability assessment.","failureModes":["Missing or invalid 'email' query parameter returns a 400 error","Temporarily unresolvable DNS (transient network error) may cause MX/SPF/DMARC checks to fail even for valid domains","Payment required (HTTP 402) if x402 micropayment header is not included or balance is insufficient","Extremely new domains may have no DNS records yet and be flagged as undeliverable despite being legitimate","Malformed but plausible-looking addresses may pass syntax checks but fail MX resolution"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call email validation that combines syntax checking, disposable provider detection, role account flagging, and live DNS-level MX/SPF/DMARC verification. It is especially valuable for agent workflows that must screen user-submitted emails before onboarding, mailing list addition, or outreach — and where you need real-time DNS evidence rather than just pattern-based heuristics. It supports x402 micropayment natively, making it suitable for autonomous agent pipelines without manual billing setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:22:53.914Z","isFirstParty":false,"canonicalSlug":"mcp-security-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-87cfc270"}