{"uid":"cap_6Ka0m71LIR_xSwc0SHL4w","slug":"chainverdict-xyz-email-authentication-posture-check-c90849ed","name":"chainverdict.xyz Email Authentication Posture Check","description":"Email-authentication posture for a domain: SPF record and policy, DMARC policy and alignment, DKIM selector presence. Use it to judge whether mail claiming to be from a counterparty can be trusted. Live DNS.","url":"https://chainverdict.xyz/v1/security/email/:domain","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Domain to check SPF/DMARC/DKIM"}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","additionalProperties":true}}}}},"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_1iEio8Nf77eR3zLLMZ0Qw","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":"Checks a domain's email authentication configuration by querying live DNS for SPF record and policy, DMARC policy and alignment, and DKIM selector presence.","exampleAgentPrompt":"Before I respond to this invoice from payments@acme-corp.com, can you check whether acme-corp.com has proper SPF, DMARC, and DKIM email authentication set up so I know the email is likely legitimate?","exampleUseCases":[{"title":"Vendor email legitimacy check","prompt":"I just got a payment request from someone claiming to be at globaltradegroup.com — can you check their SPF, DMARC, and DKIM configuration so I can tell if their email domain is properly authenticated before I send anything?"},{"title":"Counterparty due diligence before contract signing","prompt":"We're about to sign a deal with a company at partnerfirm.io — can you pull their email authentication posture including SPF policy and DMARC alignment so I can flag it for our security team?"},{"title":"Phishing risk assessment for inbound email","prompt":"I received a suspicious email claiming to be from support@bigbank.com — can you check bigbank.com's DMARC policy and SPF record to see if their domain is protected against spoofing?"}],"resultDescription":"Returns structured data about the target domain's email authentication posture, including: SPF record content and effective policy (e.g. -all, ~all, none), DMARC policy setting and alignment mode (strict/relaxed), and whether DKIM selectors are present in DNS. Enables a trust judgment on whether mail claiming to originate from that domain is likely authentic.","failureModes":["Domain does not exist or has no DNS records — returns empty or null fields for SPF/DMARC/DKIM","Domain has no SPF or DMARC configured — records return as absent/none rather than an error","DKIM selector lookup may be incomplete if non-standard selectors are used","DNS propagation delays may cause stale results for recently changed records","Payment not completed — HTTP 402 returned, call not processed","Invalid domain format in path parameter — returns 4xx error"],"whenToPreferThis":"Choose this endpoint when you need a fast, live DNS check of a domain's email authentication configuration before trusting an inbound email, processing a payment, or entering a business relationship. It is purpose-built for trust judgments on counterparty email domains and combines SPF, DMARC, and DKIM in a single call — avoiding the need to query multiple DNS resolvers manually. Prefer it over generic DNS lookup tools when you specifically need an interpreted email-security posture assessment rather than raw DNS records.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:53:44.437Z","isFirstParty":false}