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DNS SRV Record Lookup for STUN over UDP
x402
DNS SRV Record Lookup for STUN over UDP is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-14).
Looks up SRV records at _stun._udp.{hostname} to return STUN service discovery information for a given registrable domain.
Price / call$0.006
Success—
StatusUnknown
How this service works
Call when an agent needs SRV records at _stun._udp.{hostname} for STUN over UDP. The caller sends the registrable domain, not the underscored name. Send JSON {"hostname":"example.com"}. Exact $0.006 USDC on Base. Try unpaid POST /v1/sandbox/dns-srv-stun first.
Output
Returns the SRV record data found at _stun._udp.{hostname}, typically including the target STUN server hostname, port, priority, and weight as defined in the DNS SRV record.
Example use cases
WebRTC STUN server discovery
“Can you check what STUN server the domain webrtc-app.io advertises in its DNS SRV records for UDP? I need to configure my peer connection.”
NAT traversal config for VoIP
“Look up the _stun._udp SRV record for voip-provider.com — I want to see which STUN host and port they publish so I can set up NAT traversal.”
Validate STUN DNS setup
“Check the DNS SRV record at _stun._udp for mystartup.net and tell me what host and port are returned, so I can verify the STUN configuration is correct.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-srv-stun?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to discover a STUN server for a given domain via DNS SRV record lookup (specifically at _stun._udp.{hostname}), typically for WebRTC, VoIP, or NAT traversal configuration. Prefer the unpaid sandbox endpoint (POST /v1/sandbox/dns-srv-stun) for testing before using this paid endpoint at $0.006 USDC per call.
Side effects
- Domain has no _stun._udp SRV record — returns empty or not-found response
- Invalid or malformed hostname input — validation error
- DNS resolution timeout or upstream DNS failure
- Non-registrable or non-existent domain returns no records
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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