{"uid":"cap_k8R2wTH-CwACaSMg9Dwmr","slug":"arxiv-digest-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-d27536e6","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":"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_igWZkwdTajWPdbQBw3vB7","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 provider status, role-account detection, and live DNS MX, SPF, and DMARC record presence.","exampleAgentPrompt":"Can you check whether john.doe@example.com is a valid, deliverable email — specifically whether its domain has real MX records, passes SPF and DMARC checks, and isn't a disposable or burner address?","exampleUseCases":[{"title":"Pre-send email list hygiene","prompt":"Before I launch this cold outreach campaign, check whether leads@techstartup.io is actually deliverable — does the domain have MX records, is it a real business email, and does it pass SPF and DMARC?"},{"title":"Sign-up fraud prevention","prompt":"A user just registered with noreply@mailinator.com — can you verify if that's a disposable or burner address, and whether it's a role account we should reject?"},{"title":"CRM data quality audit","prompt":"I'm cleaning up our contact database — can you validate sales@acmecorp.com to make sure it has proper MX records and passes DMARC, so I know it won't bounce when we reach out?"}],"resultDescription":"Returns a structured object indicating whether the email address has valid syntax, whether the domain belongs to a known disposable/burner provider, whether it is a role-based account (e.g. info@, admin@), and live DNS lookup results for MX, SPF, and DMARC records — enabling a full deliverability risk assessment before sending.","failureModes":["Missing or empty email parameter returns a validation error","Malformed email string that fails basic syntax check returns syntax invalid flag","Temporary DNS resolution failures may result in inconclusive MX/SPF/DMARC results","Non-existent domain with no DNS records returns MX not found","Rate limiting or payment failure (HTTP 402) if USDC micropayment is not processed"],"whenToPreferThis":"Choose this endpoint when you need a real-time, multi-signal email validation covering syntax, disposable provider detection, role-account flagging, and live DNS MX/SPF/DMARC verification in a single call — particularly useful for B2B lead enrichment, sign-up fraud prevention, and pre-campaign email hygiene where deliverability confidence matters more than simple format checking.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:46:07.853Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-b4f35698"}