{"uid":"cap_zdGqrSOFwUXQVRUVHgSHp","slug":"onchain-risk-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-2a1743f4","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/spf-dmarc-auditor)","url":"https://onchain-risk.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_koqEW5LMWl_mLp3OgSF-e","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.doe@acmecorp.com is a real, deliverable email — specifically whether the domain has valid MX records, passes SPF and DMARC checks, and isn't a disposable or burner address?","exampleUseCases":[{"title":"Pre-send outreach email validation","prompt":"Before I send this cold outreach campaign, check if sarah.jones@prospectco.com is actually deliverable — does the domain have working MX records, and is it a real business address rather than a throwaway or role account?"},{"title":"User registration fraud prevention","prompt":"A new user just signed up with the email temp-user123@mailnull.com — can you verify if this is a disposable or burner email address and whether it would actually receive mail?"},{"title":"Email domain DNS health audit","prompt":"Audit the email noreply@startupxyz.io for me — I want to know if the domain has SPF and DMARC records properly configured, and whether MX is set up correctly for deliverability."}],"resultDescription":"Returns a structured object containing: email syntax validity flag, disposable/burner provider detection, role account flag (e.g. admin@, support@), live MX record lookup results, SPF record presence and content, DMARC record presence and policy, and an overall deliverability assessment.","failureModes":["Invalid or malformed email string returns syntax error","Domain does not exist — MX lookup returns NXDOMAIN","DNS timeout or lookup failure for SPF/DMARC records","Missing required 'email' query parameter returns 400 error","Payment required (HTTP 402) if x402 USDC payment header is absent or insufficient"],"whenToPreferThis":"Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, live DNS MX/SPF/DMARC lookups, and disposable provider detection — especially useful for B2B lead validation, outreach list hygiene, or fraud prevention during user registration. Prefer this over simple regex validators when you need live DNS confirmation of deliverability.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:18.213Z","isFirstParty":false,"canonicalSlug":"onchain-risk-agentdiet-dev-b2a-email-deliverability-mx-spf-dmarc-fcf933df"}