{"uid":"cap_76Q7O5dgjPnL3AHNGGv2a","slug":"dns-aaaa-mx-subdomain-8dbf30e5","name":"dns-aaaa-mx-subdomain","description":"AAAA record of mx.<domain>: looks up the mx host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mx without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/mx/aaaa?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"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_lqJQH7GE6fUNo-B4QblKv","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":"Looks up the AAAA (IPv6) DNS record for the mx.<domain> subdomain via Cloudflare DNS over HTTPS and returns existence status, records, and TTL.","exampleAgentPrompt":"Can you check if mx.example.com has an IPv6 AAAA record in DNS — I want to know if it exists, what address it resolves to, and what the TTL is?","exampleUseCases":[{"title":"Email server IPv6 readiness check","prompt":"I'm setting up a new mail server — can you check whether mx.acmecorp.com has an AAAA record in DNS so I know if it's reachable over IPv6?"},{"title":"Domain migration validation","prompt":"We just migrated our domain to a new host. Can you verify that mx.newdomain.io now has an IPv6 AAAA record and tell me the TTL so I can confirm DNS has propagated?"},{"title":"Deliverability audit for email domains","prompt":"I'm auditing email infrastructure for client domains — can you look up the AAAA record for mx.clientdomain.com and tell me whether it exists and what IPv6 address it points to?"}],"resultDescription":"Returns whether the AAAA record for mx.<domain> exists, the IPv6 address(es) in the record, and the TTL value — sourced from Cloudflare DNS over HTTPS.","failureModes":["Domain does not exist — returns no records found","mx.<domain> subdomain has no AAAA record (only A record) — returns empty result","Invalid or malformed domain input — may return error or empty response","Cloudflare DoH service outage — lookup fails","Network timeout reaching DoH resolver"],"whenToPreferThis":"Use this endpoint when you need a quick, targeted IPv6 DNS existence check specifically for the mx subdomain of a domain, without needing to enumerate all subdomains. Prefer this over general DNS tools when you want Cloudflare DoH resolution specifically and need a low-cost ($0.01) per-lookup API with a structured response. Ideal for email infrastructure audits, deliverability checks, and IPv6 readiness validation focused on the MX host.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:48.999Z","isFirstParty":false,"canonicalSlug":"dns-aaaa-mx-subdomain-8dbf30e5"}