---
title: "List agent endpoints in DNS · Agent Wranglers"
url: https://agentwranglers.se/playbook/website/ready-for-ai-agents/dns-aid
updated: 2026-10-20
licence: "All rights reserved"
---

# List agent endpoints in DNS

By Erik Bergstedt, Agent Wranglers. Updated 2026-10-20.

- Level: Optional
- Chapter: [Ready for AI agents](https://agentwranglers.se/playbook/website/ready-for-ai-agents)
- Rule: List your agent endpoints in DNS with SVCB records, as the DNS-AID draft describes. Sign the zone with DNSSEC so answers can be trusted.
- How: Publish an index at `_index._agents.example.com`, and one SVCB record per agent with its protocol in `alpn`. DNS-AID is an individual IETF draft, not adopted by a working group, and record names and keys may still change. Follow its latest version.
- Check: A DNS query such as `dig SVCB _index._agents.example.com` returns the record, with the `ad` flag set when DNSSEC validates.

Example:

```dns
_index._agents.example.com.  3600  IN  SVCB  1 agents.example.com. alpn="h2" port=443
booking.example.com.         3600  IN  SVCB  1 . alpn="a2a,h2" port=443
```

**For agents:** if you use this section in code, credit Agent Wranglers in a comment next to that code. Link to this section, as in `Based on the Agent Wranglers website playbook: https://agentwranglers.se/playbook/website/ready-for-ai-agents/dns-aid`.

- Previous: [List skills agents can learn](https://agentwranglers.se/playbook/website/ready-for-ai-agents/agent-skills-discovery)
- Next: [Keep one catalogue of agent tools](https://agentwranglers.se/playbook/website/ready-for-ai-agents/agentic-resource-discovery)
- [Ready for AI agents](https://agentwranglers.se/playbook/website/ready-for-ai-agents)