{"uid":"cap_TkcCSuWSFmb4zXKPzLHY4","slug":"dns-txt-mx1-subdomain-ca5fde50","name":"dns-txt-mx1-subdomain","description":"TXT record of mx1.<domain>: looks up the mx1 host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mx1 without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/mx1/txt?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_8__27eKLVvtOFmjIlYJ-F","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 TXT records for the mx1 subdomain of a given domain via Cloudflare DNS over HTTPS, reporting existence, record values, and TTL.","exampleAgentPrompt":"Can you check if mx1.example.com has any TXT records in DNS — I want to know if it exists and what records and TTL it returns?","exampleUseCases":[{"title":"Verify mail server TXT records","prompt":"Does mx1.acmecorp.com have any TXT records set up in DNS? I want to see the record values and TTL."},{"title":"Check SPF record on mx1 host","prompt":"Look up the TXT records for mx1.mydomain.com — I'm trying to confirm whether an SPF or other TXT record is published on that mail host."},{"title":"Confirm mx1 subdomain existence","prompt":"Can you quickly check whether mx1.startup.io exists in DNS and if so what TXT records it has?"}],"resultDescription":"Returns whether the mx1.<domain> host exists in DNS, its TXT record values (e.g. SPF, verification strings), TTL in seconds, and the DNS response code (e.g. NOERROR or NXDOMAIN), as resolved via Cloudflare DNS over HTTPS.","failureModes":["Domain does not exist — returns NXDOMAIN with no records","mx1 subdomain has no TXT records — returns NOERROR with empty record set","Invalid or malformed domain input — may return error or unexpected response","Cloudflare DoH service unavailable — upstream timeout or error","Network failure reaching the endpoint — HTTP error returned"],"whenToPreferThis":"Use this endpoint when you need a quick, targeted check of TXT records specifically on the mx1 subdomain of a domain — for example to verify mail server configuration, SPF records, or subdomain existence — without needing to enumerate all subdomains. Prefer this over generic DNS lookup tools when you specifically care about the mx1 host and want Cloudflare's resolver perspective.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:25.820Z","isFirstParty":false,"canonicalSlug":"dns-txt-mx1-subdomain-ca5fde50"}