{"uid":"cap_FDtaGUERL8MU3n-isPKD0","slug":"saylor-innovations-email-authentication-posture-checker-5ca20611","name":"Saylor Innovations Email Authentication Posture Checker","description":"Email authentication posture for a domain - SPF with lookup count, DMARC policy and reporting, DKIM selectors, MX, MTA-STS, TLS-RPT and BIMI with prioritised issues","url":"https://saylorinnovations.com/api/email/auth?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","POST","PUT","PATCH","DELETE","HEAD"],"type":"string"},"queryParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Sending domain such as example.com"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","required":["domain","verdict","issues"],"properties":{"mx":{"type":"array","items":{"type":"object","properties":{"priority":{"description":"MX preference; lower values are tried first"}}},"description":"Mail exchangers with priority and host"},"spf":{"type":["object","null"],"properties":{"all":{"description":"The all qualifier: - fail, ~ softfail, ? neutral, + pass"},"record":{"description":"The SPF TXT record"},"includes":{"description":"Domains included by the record"}},"description":"SPF record text with parsed mechanisms and the all-qualifier policy"},"bimi":{"type":"boolean","description":"True when a BIMI record is published"},"note":{"type":"string","description":"Caveat or context for reading the result"},"dmarc":{"type":["object","null"],"properties":{"rua":{"description":"Address for aggregate reports"},"ruf":{"description":"Address for forensic reports"},"policy":{"description":"DMARC policy: none, quarantine or reject"},"percent":{"description":"Percentage of mail the policy applies to"}},"description":"DMARC record with policy, subdomain policy, percentage, report addresses (rua, ruf) and DKIM and SPF alignment modes"},"domain":{"type":"string","description":"Domain name"},"issues":{"type":"array","items":{"type":"object","properties":{"issue":{"description":"Weakness found in the email authentication setup"}}},"description":"Issues found"},"source":{"type":"string","description":"Data source the values come from"},"mta_sts":{"type":"boolean","description":"Mta sts"},"tls_rpt":{"type":"boolean","description":"Tls rpt"},"verdict":{"type":"string","description":"Overall assessment derived from the listed reasons"},"dkim_selectors_found":{"type":"array","description":"Dkim selectors found"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6DRyaBM9UFsnqvRPI5Rjj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a comprehensive email authentication analysis for a domain, including SPF lookup count, DMARC policy, DKIM selectors, MX records, MTA-STS, TLS-RPT, and BIMI status with prioritised issues","exampleAgentPrompt":"Can you check the full email authentication posture for example.com — I want to see the SPF lookup count, DMARC policy, DKIM selectors, MX records, and any prioritised issues I should fix?","exampleUseCases":[{"title":"Pre-send deliverability audit","prompt":"Before we start our email campaign, can you audit the email authentication setup for ourbrand.com and tell me if there are any SPF, DMARC, or DKIM issues we need to fix?"},{"title":"Security posture review for acquired domain","prompt":"We just acquired newcompany.com — can you pull a full email authentication report including DMARC policy, SPF record, MX hosts, and whether BIMI is set up, so we know what needs hardening?"},{"title":"Diagnosing deliverability failures","prompt":"Emails from clientdomain.com keep landing in spam — can you check their email authentication posture, including SPF lookup count and DMARC reject/quarantine settings, and list the prioritised issues?"}],"resultDescription":"A JSON object containing: domain verdict and notes; SPF record text with parsed mechanisms, all-qualifier policy, included domains, and DNS lookup term count; DMARC policy with aggregate/forensic report addresses, policy level (none/quarantine/reject), percentage applied, and SPF/DKIM alignment modes; DKIM selectors found; MX records with hostnames and priority values; MTA-STS and TLS-RPT configuration; BIMI presence flag; and a prioritised list of issues to remediate.","failureModes":["Domain does not exist or is unresolvable — returns null or empty results for DNS records","Domain has no SPF or DMARC record published — fields returned as null with appropriate notes","DNS lookup timeout or transient failure — may return partial results","Invalid domain format provided — likely returns error or empty response","DNS lookup limit exceeded for SPF — flagged in dns_lookup_terms field"],"whenToPreferThis":"Choose this endpoint when you need a single-call, comprehensive email authentication audit covering SPF, DMARC, DKIM, MX, MTA-STS, TLS-RPT, and BIMI together with prioritised remediation issues. Prefer it over generic DNS lookup tools when you want pre-parsed, structured email security posture data with actionable issue rankings rather than raw DNS responses.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T00:31:53.915Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-email-authentication-posture-checker-5ca20611"}