{"uid":"cap_mZpGHWVDupWqa6ygS1G8E","slug":"dns-txt-sip-subdomain-167fed37","name":"dns-txt-sip-subdomain","description":"TXT record of sip.<domain>: looks up the sip 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 sip without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/sip/txt?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_B_0IEUoVzbtWk8lweXSUg","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 TXT DNS record for the sip.<domain> subdomain via Cloudflare DoH and reports its existence, record values, and TTL.","exampleAgentPrompt":"Can you check if sip.example.com has any TXT DNS records and tell me what they say and how long until they expire?","exampleUseCases":[{"title":"VoIP infrastructure DNS audit","prompt":"I'm setting up a VoIP system and need to verify whether sip.acmecorp.com has TXT DNS records configured — can you look that up and tell me the record values and TTL?"},{"title":"SIP subdomain existence check","prompt":"Does sip.startupco.io actually exist in DNS? I just want to know if there's a TXT record there and what it contains."},{"title":"Competitor SIP configuration research","prompt":"Can you check the TXT records on the sip subdomain of rivaltelco.com and report back what you find, including the TTL?"}],"resultDescription":"Returns whether the sip.<domain> subdomain has TXT DNS records, along with the record values (strings) and TTL in seconds, queried via Cloudflare DNS over HTTPS.","failureModes":["Domain does not exist — returns not found or empty result","sip subdomain has no TXT records — existence reported as false with empty records","Malformed or missing domain input — request may fail or return an error","Cloudflare DoH upstream timeout — service may return an error or delayed response","Rate limiting or payment failure — 402 payment required if x402 credentials are missing"],"whenToPreferThis":"Use this endpoint when you specifically need to check the TXT DNS record for the sip.<domain> subdomain (commonly used for VoIP/SIP service configuration) without enumerating all subdomains. Prefer it over general DNS lookup tools when you want a quick, targeted existence check for the sip host with TTL information, and when you're operating in an x402 micropayment-capable environment at low cost ($0.01 per call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:48.726Z","isFirstParty":false,"canonicalSlug":"dns-txt-sip-subdomain-167fed37"}