Discoverability · Emerging · Medium impact
DNS-AID discovery record
Lets agents read discovery information over DNS without an HTTP round trip. Cloudflare added it to its readiness checklist.
- Emerging
- Medium impact
- Experimental standard
| Property | Value |
|---|---|
| Check id | dns-aid |
| Dimension | Discoverability (20%) |
| Tier | Emerging — pool 5 pts |
| Weight inside tier | 2 |
| Impact | Medium |
| Maturity | Experimental — An early convention that may still change shape. |
| Conditional | No |
| Publishing skill | dns-aid |
| Standards | — |
What is measured
The scanner queries DNS-AID records over DNS: SVCB records (RR type 64) at the organization entry point _index._agents.<domain>, as defined by DNS-AID (draft-mozleywilliams-dnsop-dnsaid), and at _agent.<domain>, the older single-record form. It does not query the agent names an index advertises. Pass = at least one SVCB record resolves with a TargetName and at least one SvcParamKey such as well-known, alpn, port or cap. Partial = only the TXT fallback form is published, or a record exists but carries no SvcParamKeys. Fail = NXDOMAIN, or no SVCB and no TXT record at those names. Not measured = the DNS-over-HTTPS resolver answers none of the DNS-AID questions.
Reproduce it yourself
You do not have to take our word for any of this. Run the same measurement against your own domain:
DOMAIN=example.com
dig +short TYPE64 _index._agents.$DOMAIN; dig +short TYPE64 assistant.$DOMAIN
The fix
This is the artifact to ship. It is the complete change, not a description of one.
; DNS-AID records for example.com (draft-mozleywilliams-dnsop-dnsaid)
; Organization index entry point: the agents this domain advertises.
_index._agents.example.com. 3600 IN SVCB 1 agent-index.example.com (
alpn="h2"
port=443
well-known=agent-card.json
)
; One SVCB record per advertised agent.
assistant.example.com. 3600 IN SVCB 1 . (
alpn="mcp,h2"
port=443
ipv4hint=192.0.2.1
ipv6hint=2001:db8::1
well-known=agent-card.json
cap=https://example.com/.well-known/agent-card.json
)
Related checks
| Check | Tier | Impact | Same skill |
|---|---|---|---|
reachable — Homepage open to agent access | Essential | Critical | — |
robots-txt — robots.txt with agent directives | Essential | High | — |
sitemap-xml — sitemap.xml valid and current | Essential | High | — |
llms-txt — /llms.txt published and well-structured | Essential | Critical | — |
link-headers — Discovery via Link response headers | Emerging | Medium | — |
canonical — Canonical and hreflang discipline | Recommended | Medium | — |
llms-full — /llms-full.txt expanded context | Recommended | Low | — |
agents-md — AGENTS.md with the required sections | Recommended | High | — |