{"uid":"cap_KcHeF_z55HgpRAzosQMMu","slug":"dns-srv-record-lookup-for-mail-submission-submission-tcp-315e534a","name":"DNS SRV Record Lookup for Mail Submission (_submission._tcp)","description":"Call when an agent needs SRV records at _submission._tcp.{hostname} for mail submission. The caller sends the registrable domain, not the underscored name. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-submission first.","url":"https://agentshelf.syntexa.ch/v1/dns-srv-submission?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"hostname":{"type":"string","examples":["example.com"],"maxLength":253,"minLength":1,"description":"Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_b5V3Mleiy51vD_24nDj7R","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Resolves SRV records at _submission._tcp.{hostname} for a given registrable domain, returning mail submission server details.","exampleAgentPrompt":"Can you look up the SRV records for mail submission for the domain example.com? I need to know which server and port handle email submission there.","exampleUseCases":[{"title":"Discover mail submission server for domain","prompt":"What mail submission server and port does gmail.com use? Look up the _submission._tcp SRV records for gmail.com."},{"title":"Email client auto-configuration","prompt":"I'm setting up an email client for proton.me — can you find the SRV record for mail submission so I know the right host and port to configure?"},{"title":"Verify email infrastructure for a domain","prompt":"Can you check the _submission._tcp SRV records for fastmail.com and tell me what priority, weight, port, and target hostname they publish?"}],"resultDescription":"Returns SRV record data for _submission._tcp.{hostname}, including the mail submission server's target hostname, port, priority, and weight as found in DNS.","failureModes":["Domain has no _submission._tcp SRV record in DNS — returns empty or NXDOMAIN result","Invalid or malformed hostname input — returns validation error","DNS resolution timeout or upstream failure — returns error response","Non-registrable or non-existent domain provided — may return no records"],"whenToPreferThis":"Use this endpoint when an agent needs to programmatically discover the mail submission server and port for a domain via DNS SRV records, especially for email client auto-configuration, infrastructure auditing, or routing decisions. Prefer the free sandbox endpoint (POST /v1/sandbox/dns-srv-submission) when available to avoid the $0.009 USDC cost.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T03:15:31.339Z","isFirstParty":false,"canonicalSlug":"dns-srv-record-lookup-for-mail-submission-submission-tcp-315e534a"}