{"uid":"cap_rrrmvyaoOJjDJCDQmnlEf","slug":"dns-a-record-lookup-for-mail-subdomain-20a87e4d","name":"DNS A Record Lookup for mail Subdomain","description":"A record of mail.<domain>: looks up the mail host under the domain you give (A via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mail without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/mail/a?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_WCaljdzRGHmWnqglmPeoS","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 A record of the mail.<domain> subdomain via Cloudflare DNS over HTTPS and reports its existence, IP records, and TTL.","exampleAgentPrompt":"Check if mail.github.com exists and what IP address it resolves to — use the mail subdomain A record lookup via Cloudflare DoH.","exampleUseCases":[{"title":"Verify mail server DNS before email setup","prompt":"Does mail.acmecorp.com actually resolve to an IP? I'm setting up email routing and want to make sure the mail subdomain exists and has an A record before I proceed."},{"title":"Audit mail infrastructure for a client domain","prompt":"I'm doing a quick infrastructure check on clientdomain.com — can you look up whether mail.clientdomain.com has an A record and tell me the IP and TTL?"},{"title":"Monitor if mail subdomain goes offline","prompt":"I want to know if mail.mycompany.io is currently resolving — check the A record for the mail subdomain and let me know if it exists and what it returns."}],"resultDescription":"Returns whether the mail.<domain> A record exists, the resolved IP address(es), the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN).","failureModes":["Domain does not exist — returns NXDOMAIN response code with no records","mail subdomain not configured — returns NXDOMAIN or empty answer section","Network or DoH resolver error — may return a timeout or 5xx error","Malformed domain input — may return an error or unexpected DNS response","Domain exists but mail subdomain has no A record (only AAAA or CNAME) — returns empty A record answer"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap existence check specifically for the mail.<domain> subdomain A record without doing a full subdomain enumeration. Prefer this over generic DNS tools when you want a targeted, pay-per-lookup query routed through Cloudflare DoH for reliability and consistency.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:56:09.257Z","isFirstParty":false,"canonicalSlug":"dns-a-record-lookup-for-mail-subdomain-20a87e4d"}