{"uid":"cap_xBBY3GvkXJ_F7Jhb4uSN2","slug":"onchain-risk-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-012fbf82","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://onchain-risk.agentdiet.dev/v1/mx-deliverability-verifier)","url":"https://onchain-risk.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_KNFbaVsDZENt24jH_917L","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"onchain-risk.agentdiet.dev","brandSlug":"onchain-risk-agentdiet-dev-mpp","brandBaseUrl":"https://onchain-risk.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 checks.","exampleAgentPrompt":"Can you check whether john.smith@example.com is a real, deliverable email address — specifically whether it has valid MX records, isn't from a disposable provider, and whether the domain has SPF and DMARC set up properly?","exampleUseCases":[{"title":"Lead list email hygiene check","prompt":"Before I import this lead list, can you verify that sarah.jones@acmecorp.io is actually deliverable — check the MX records, make sure it's not a throwaway address, and confirm the domain has SPF and DMARC configured?"},{"title":"New user signup validation","prompt":"A user just signed up with the email temp-user123@mailnesia.com — can you tell me if that's a disposable or burner email address and whether it would actually receive mail?"},{"title":"Cold outreach domain audit","prompt":"I'm about to cold-email a prospect at ceo@startupxyz.com — can you check if that domain has working MX records and proper email authentication like SPF and DMARC before I send?"}],"resultDescription":"Returns a structured object indicating email syntax validity, whether the domain is a known disposable/burner provider, whether the address is a role account (e.g. info@, admin@), live DNS MX record presence and details, SPF record existence and content, and DMARC policy record status — giving a comprehensive deliverability risk assessment.","failureModes":["Malformed or missing email input returns a validation error","DNS lookup timeout if the queried domain is unreachable or extremely slow","Disposable provider list may lag behind newly created throwaway domains","Role account detection based on username prefix heuristics may produce false positives for legitimate addresses","API payment failure via x402 if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need a single, comprehensive email quality check combining syntax validation, disposable provider detection, role account flagging, and live DNS MX/SPF/DMARC lookup in one call — especially in agentic workflows processing user signups, lead lists, or outreach targets where deliverability and authentication posture matter together.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:36:00.435Z","isFirstParty":false,"canonicalSlug":"onchain-risk-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-fcf933df"}