{"uid":"cap_mToqZ5qcB116lwqTiZCxy","slug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-02f37f5b","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/spf-dmarc-auditor)","url":"https://prompt-guard.agentdiet.dev/v1/spf-dmarc-auditor?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_it3BECo_tUyxhP1kJ9Tx8","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 presence.","exampleAgentPrompt":"Can you check whether john.doe@example.com is a real, deliverable email — specifically whether the domain has MX records set up, isn't a disposable provider, and has SPF and DMARC configured?","exampleUseCases":[{"title":"Screen sign-up email before onboarding","prompt":"Before I create an account for this new user, can you verify that their email address signup@mailinator.com is legitimate — check if it's a disposable service and whether the domain actually has working MX records?"},{"title":"Audit lead list email quality","prompt":"I have a sales lead with the email contact@prospectcorp.io — can you check if it's a role account, whether their domain has MX and DMARC records, and whether the address looks deliverable before we add them to our outreach sequence?"},{"title":"Diagnose email deliverability issues","prompt":"We're having trouble getting replies from partners at notifications@bigclient.com — can you look up whether that domain has SPF and DMARC records properly set up, and confirm the MX records are there?"}],"resultDescription":"Returns a structured object indicating email syntax validity, whether the domain is a known disposable/burner provider, whether it is a role account (e.g. info@, admin@), and live DNS lookup results for MX records (confirming mail server existence), SPF record presence and content, and DMARC policy record presence — collectively indicating whether the email is likely deliverable and domain security is configured.","failureModes":["Invalid or malformed email format returns a syntax error or validation failure flag","Domain does not exist in DNS — MX lookup returns NXDOMAIN or empty result","DNS timeout or resolver error causes lookup failure with a service error","Ambiguous domains (e.g. newly registered) may return partial DNS results","Disposable provider list may not cover every burner service, leading to false negatives"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call check covering email syntax, disposable/burner domain detection, role account classification, and live DNS MX/SPF/DMARC verification together. It is ideal for B2B lead qualification, sign-up fraud prevention, pre-send deliverability checks, and domain email security audits. Prefer it over simple syntax validators when DNS-level deliverability and anti-spam record checks are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:40:31.499Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-f0765224"}