{"uid":"cap_AVUX-T5o3ucc02HiVER-J","slug":"sip-tcp-srv-record-lookup-85ef8797","name":"SIP TCP SRV Record Lookup","description":"SIP service discovery (_sip._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's sip service lives without guessing hosts. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/srv/sip-tcp?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_a0vhOic5eUQ_eeRBKcdyo","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 _sip._tcp SRV DNS records for a domain to discover SIP service host, port, priority, and weight via Cloudflare DoH.","exampleAgentPrompt":"Can you look up the _sip._tcp SRV records for example.com so I know which host and port handle its SIP service and what the priority and weight are?","exampleUseCases":[{"title":"VoIP provider SIP endpoint discovery","prompt":"I need to connect to the SIP service for voip-provider.com — can you find the SRV records for _sip._tcp on that domain and tell me the target host, port, priority, and weight?"},{"title":"Telecom infrastructure audit","prompt":"I'm auditing SIP infrastructure for acmecorp.com — pull the _sip._tcp SRV records so I can see which host handles SIP, on what port, and whether priority and weight are configured correctly."},{"title":"Automated SIP failover routing","prompt":"Before setting up our SIP client, can you resolve the _sip._tcp SRV records for our carrier domain sip.carrier.net and return the full list of targets with their priorities and weights so we can configure failover?"}],"resultDescription":"Returns one or more SRV records for the _sip._tcp.<domain> DNS query, each containing: priority (integer), weight (integer), port (integer), and target hostname. Multiple records may be returned when the domain has multiple SIP endpoints for load balancing or failover.","failureModes":["Domain has no _sip._tcp SRV records — returns empty result set","Domain does not exist (NXDOMAIN) — lookup fails with DNS error","Cloudflare DoH upstream timeout — transient error requiring retry","Malformed domain input — query rejected","SERVFAIL from authoritative DNS — upstream DNS error propagated"],"whenToPreferThis":"Choose this endpoint when you need to programmatically discover where a domain's SIP TCP service lives, including host, port, priority, and weight, without manually guessing hostnames. It is ideal for VoIP client configuration, telecom infrastructure auditing, SIP trunk setup, and automated failover routing. It specifically targets _sip._tcp (TCP transport) as opposed to _sip._udp (UDP transport).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T19:02:41.467Z","isFirstParty":false,"canonicalSlug":"sip-tcp-srv-record-lookup-85ef8797"}