{"uid":"cap_xkMspkIEXZVqeFYClOrZf","slug":"trustsource-email-authentication-checker-fbbe50c4","name":"TrustSource Email Authentication Checker","description":"Grade a domain's email-authentication posture (SPF, DKIM, DMARC, BIMI, MX) and tell an agent whether the sender can be spoofed. Returns an A–F grade, a `spoofable` flag, the parsed DMARC policy and SPF qualifier, and specific misconfiguration issues. Use to judge a sender domain before trusting an email, or to confirm your own outreach domain won't be silently rejected by Gmail/Yahoo/Microsoft's 2026 authentication rules.","url":"https://api.trustsource.cc/emailtrust","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"},"queryParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Sender domain or email address to grade (e.g. example.com or user@example.com)."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-7urH11xSjo3MGIB7EPMt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","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 posture (SPF, DMARC, DKIM, MX records) and returns an overall email trust score.","exampleAgentPrompt":"Can you check the email authentication setup for paypal.com — I want to know if they have SPF, DMARC, and DKIM configured and what their overall email trust score looks like?","exampleUseCases":null,"resultDescription":"Returns the domain's SPF record status, DMARC policy details, DKIM configuration, MX record presence, and an overall email trust score, giving a comprehensive picture of the domain's email authentication posture.","failureModes":["Invalid or malformed domain/email input returns an error","Domain does not exist in DNS — returns missing record statuses","DNS lookup timeout for slow or non-responsive name servers","Missing required 'domain' query parameter returns 400-level error","Rate limiting or payment failure returns 402 or 429 response"],"whenToPreferThis":"Use this endpoint when you need a comprehensive, all-in-one assessment of a domain's email authentication configuration (SPF, DMARC, DKIM, MX) with a single API call. Prefer it over manual DNS lookups when you need a scored trust verdict rather than raw DNS record data, or when evaluating whether an inbound email sender domain is properly authenticated.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:33:37.774Z","isFirstParty":false}