{"uid":"cap_uW7wcURTApSeZ8O3keU-z","slug":"synthora-email-deliverability-check-75cebd25","name":"SYNTHORA Email Deliverability Check","description":"Email deliverability and spam check: given a domain or email address, returns SPF, DKIM (common selectors), DMARC, MX records and a deliverability/spam score. DNS-only, deterministic, Ed25519-signed. Pay-per-use via x402 USDC on Base.","url":"https://deliver.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","description":"Domain or email address to audit"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"deliverability","result":{"mx":[],"spf":{},"dkim":{},"dmarc":{},"score":100,"domain":"example.com","verdict":"good","recommendations":[]}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_AXS9XlnnWQZ98QsMbgY2Y","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Audits a domain or email address for SPF, DKIM, DMARC, MX records and returns a deliverability/spam score via DNS-only lookup","exampleAgentPrompt":"Can you do a full email deliverability check on example.com — I want to see the SPF, DKIM, DMARC, and MX records along with the spam score?","exampleUseCases":null,"resultDescription":"Returns SPF record details, DKIM results for common selectors, DMARC policy, MX records, and a numeric deliverability/spam score — all derived from live DNS lookups and signed with Ed25519 for authenticity.","failureModes":["Domain not found or does not exist — DNS resolution failure","Invalid domain or email format in input — validation error","No SPF/DMARC/DKIM records found — returns missing/empty for those fields","Payment not provided or insufficient — x402 payment required error","Rate limiting or DNS timeout — upstream DNS error response"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, DNS-only deliverability audit for a single domain or email address and want a combined SPF/DKIM/DMARC/MX result plus a spam score in one call. Ideal for automated compliance checks, pre-send domain validation, or diagnosing email delivery problems. The Ed25519-signed response is useful when you need verifiable, tamper-evident results.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T21:08:16.201Z","isFirstParty":false}