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DNS SRV Record Lookup for STUN over TCP
x402
DNS SRV Record Lookup for STUN over TCP is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-19).
Resolves SRV DNS records at _stun._tcp.{hostname} given a registrable domain name, returning STUN-over-TCP service location data.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs SRV records at _stun._tcp.{hostname} for STUN over TCP. The caller sends the registrable domain, not the underscored name. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-stun-tcp first.
Output
Returns the SRV record data found at _stun._tcp.{hostname}, including fields such as priority, weight, port number, and target hostname of the STUN server. If no record exists, returns an empty or error response.
Example use cases
WebRTC peer connection setup
“I need to find the STUN server and port that example.com advertises over TCP for WebRTC — can you look up its _stun._tcp SRV records?”
VoIP infrastructure discovery
“We're configuring our SIP client to connect to voipprovider.com — look up the STUN TCP SRV record so we know which server and port to use for NAT traversal.”
Network diagnostic check
“Can you check whether mycompany.com has any STUN-over-TCP SRV records published in DNS and tell me the priority, weight, port, and target if they exist?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-srv-stun-tcp?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to programmatically discover STUN-over-TCP service endpoints via DNS SRV records for a given domain, particularly in WebRTC, VoIP, or NAT traversal scenarios. Prefer the free sandbox POST /v1/sandbox/dns-srv-stun-tcp endpoint during development or testing. Choose this paid endpoint when the sandbox is unavailable or for production lookups.
Side effects
- No SRV record exists for the given hostname — returns empty result or not-found error
- Invalid or malformed hostname input — returns validation error
- DNS resolution timeout or network failure — returns error
- Hostname exceeds 253-character limit — rejected by schema validation
- Payment not provided or insufficient — request rejected with 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hostname | string | Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name. |
Tags
x402
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