{"uid":"cap_sCYJKN8gcJYesoEpmmYE3","slug":"domain-intel-mx-record-change-detector-posteo-dns-halowerk-com-e87a61e8","name":"Domain Intel MX Record Change Detector (Posteo) — dns.halowerk.com","description":"Domain in, WHOIS, DNS, mail policy, TLS certificate and subdomains out. Pay per call in USDC over x402. No signup, no API key.","url":"https://dns.halowerk.com/domain/articles/mx-posteo?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"domain":{"type":"string","maxLength":253},"baseline":{"type":"object","required":["domain","observed_at","records"],"properties":{"domain":{"type":"string","maxLength":253},"records":{"type":"array","items":{"type":"object","required":["exchange","priority"],"properties":{"exchange":{"type":"string","maxLength":254},"priority":{"type":"integer","maximum":65535,"minimum":0}},"additionalProperties":false},"maxItems":50},"observed_at":{"type":"string","maxLength":40}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Usw2LhJ1BAU2AOk6HFU2W","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a domain's MX records have changed relative to a Posteo-observed baseline, returning current DNS, WHOIS, mail policy, TLS, and subdomain data; billed per call in USDC via x402.","exampleAgentPrompt":"Check whether the MX records for example.com have changed from what Posteo observed on 2024-11-01, when they pointed to mx.posteo.de with priority 10 — and give me the full current DNS, WHOIS, mail policy, and TLS cert too.","exampleUseCases":[{"title":"Email provider migration detection","prompt":"Has acmecorp.com changed its mail servers since 2024-09-15? Back then Posteo saw mx1.posteo.de at priority 10 — tell me if the MX records are different now and show me the current DNS and WHOIS."},{"title":"Domain mail security audit","prompt":"Pull the full DNS, SPF, DKIM, DMARC, TLS certificate, and subdomains for startup.io — I need to audit their email security posture and want everything in one call."},{"title":"Competitor email infrastructure monitoring","prompt":"I want to know if rival.com has quietly switched email providers — the last baseline I have from Posteo shows mail.posteo.de priority 20 observed on 2025-01-10. Check if that's still true and return the current mail config."}],"resultDescription":"Returns current WHOIS registration data, full DNS records, MX records with priorities, mail policy details (SPF/DKIM/DMARC), TLS certificate information, and discovered subdomains for the queried domain. When a baseline is supplied, the response also highlights any changes in MX records relative to that baseline.","failureModes":["Domain not found or unresolvable — returns empty or error result","Payment not received via x402 — 402 response requiring USDC payment","Malformed domain input exceeding 253 characters — schema validation error","Baseline records array exceeds 50 items — rejected by schema","WHOIS rate limiting or registry unavailability — partial result returned","TLS certificate lookup failure for domains without HTTPS — cert field absent"],"whenToPreferThis":"Choose this endpoint when you need a no-signup, pay-per-call way to retrieve comprehensive domain intelligence — especially when you want to detect MX record drift against a previously observed Posteo baseline. It bundles WHOIS, DNS, mail policy, TLS, and subdomains into a single call for $0.009 USDC, making it ideal for agents that need ephemeral, cost-accountable domain lookups without API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:18.698Z","isFirstParty":false,"canonicalSlug":"domain-intel-mx-record-change-detector-posteo-dns-halowerk-com-e87a61e8"}