{"uid":"cap_HxPoEu3oc6-jgMJ-c8x_k","slug":"arxiv-digest-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-6faf69e1","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://arxiv-digest.agentdiet.dev/v1/mx-deliverability-verifier)","url":"https://arxiv-digest.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_A9mSflZM2otfkjWoixB54","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"arxiv-digest.agentdiet.dev","brandSlug":"arxiv-digest-agentdiet-dev-mpp","brandBaseUrl":"https://arxiv-digest.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Validates an email address for syntax correctness, disposable/burner domain status, role account detection, and live DNS MX/SPF/DMARC record health.","exampleAgentPrompt":"Can you verify whether john.doe@example.com is a real, deliverable email address — check its syntax, MX records, SPF and DMARC setup, and whether it's a disposable or role account?","exampleUseCases":[{"title":"SaaS signup fraud prevention","prompt":"Before we let this user register, can you check if the email they gave us — temp-user-49281@guerrillamail.com — is a burner or disposable address, and whether its domain actually has working MX records?"},{"title":"B2B lead list email hygiene","prompt":"I have a lead I want to email — ceo@acmecorp.io — can you validate it fully? I want to know if it's syntactically correct, whether the domain has live MX servers, and if SPF and DMARC are properly configured."},{"title":"Detecting role account signups","prompt":"Someone just signed up with support@bigcompany.com — can you tell me if that's a role-based email address that we should flag before sending them a personalized onboarding sequence?"}],"resultDescription":"Returns a structured object indicating whether the email address passes syntax checks, whether the domain uses a known disposable or burner provider, whether the address is a role account (e.g. info@, admin@), and live DNS lookup results including presence and validity of MX records (mail servers), SPF policy, and DMARC policy — giving a comprehensive deliverability assessment.","failureModes":["Invalid or missing email field returns a validation error","DNS lookup timeouts may cause inconclusive MX/SPF/DMARC results","Newly registered domains may lack MX/SPF/DMARC records leading to false negatives","Disposable provider list may not include very new burner services","Non-existent TLDs return DNS failure","Rate limiting or payment failure (HTTP 402) if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, multi-signal email validation that goes beyond simple syntax checking — specifically when you need live DNS MX resolution combined with SPF/DMARC policy verification and disposable/role account detection in a single call. Prefer it over generic email syntax validators when deliverability confidence and fraud risk assessment both matter, such as during user onboarding, B2B lead enrichment, or pre-send list cleaning.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:39:18.240Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-b4f35698"}