{"uid":"cap_5ngDHVWlviLbZAjoFqsHC","slug":"how-is-email-authentication-checker-33c8231f","name":"how.is Email Authentication Checker","description":"SPF, DKIM and DMARC records and posture for a domain.","url":"https://how.is/v1/domain/email-auth?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","maxLength":253,"description":"A bare domain name, e.g. example.com"}}},"responseSchema":{"type":"json","example":{"data":{"_shape":"data.data: spf, dkim, dmarc, mx, overallScore, overallStatus, recommendations."},"result":"Email authentication for the requested subject","receipt":{"rail":"x402","tool":"email-auth","charge_usd":0.005,"settlement_tx":"0x…"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GP3cjfvrX3SUkPkokcTmk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves and evaluates SPF, DKIM, and DMARC DNS records for a domain, returning an overall email authentication posture score and recommendations.","exampleAgentPrompt":"Can you check the email authentication setup for stripe.com — I want to see their SPF, DKIM, and DMARC records and whether the overall posture is solid?","exampleUseCases":[{"title":"Pre-send email deliverability audit","prompt":"Before I start sending marketing emails from acme.com, can you pull up its SPF, DKIM, and DMARC records and tell me if there are any gaps I need to fix?"},{"title":"Phishing risk assessment for a vendor domain","prompt":"I just got an email claiming to be from payments.globalcorp.com — can you check whether that domain has DMARC enforcement set up, so I can tell if it's likely spoofed?"},{"title":"Onboarding domain security check","prompt":"We're onboarding a new partner and their domain is partnerhub.io — can you audit their email authentication records and give me an overall score and any recommendations?"}],"resultDescription":"Returns a JSON object containing parsed SPF, DKIM, DMARC, and MX records, an overall numerical score, an overall status label, and a list of actionable recommendations for improving email authentication posture, along with a payment receipt confirming the x402 micro-payment.","failureModes":["Invalid or malformed domain name returns a validation error","Domain not found in DNS returns empty or null records for SPF/DKIM/DMARC","Domain with no email authentication records returns low score with recommendations","Network timeout during DNS lookup may return an error or partial data","Domains exceeding 253 characters are rejected by schema validation"],"whenToPreferThis":"Use this endpoint when you specifically need to inspect and score a domain's email authentication posture (SPF, DKIM, DMARC) in one call, rather than manually querying individual DNS records. It is the right choice when auditing email deliverability, assessing phishing exposure, or verifying a domain's anti-spoofing configuration, and it pairs well with other how.is sibling endpoints (e.g. blocklist checks, domain age) for a complete domain security profile.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:39:56.102Z","isFirstParty":false,"canonicalSlug":"how-is-email-authentication-checker-33c8231f"}