Free tool · no signup · runs now
DNS agent index checker
The DNS agent index points agents at your organization without touching your site. The checker queries the same record the audit requires.
Part of the AI agent discovery checker group — also included in the free full scan.
Checks site-wide files at the domain root — any page URL on the domain gives the same result.
One free scan · anonymous preview · sign in to save the full report
organization index HTTPS record existsStatic example for DNS agent index checker; run the check above for your own result.What it checks
See whether agents can index your organization through the DNS agent index.
SVCB or HTTPS ServiceMode record with alpn, plus well-known/card pointers; TXT fallback.
Queries DNS over HTTPS only, never touches your site. Records are advisory.
What good looks like
Good looks like a ServiceMode record carrying alpn, pointing agents at your organization without touching your site. A record missing alpn fails; no records report na — the draft is advisory, absent records never fail.
How to fix it
Add an _index._agents HTTPS/SVCB record and put alpn in the record value (DNS comments are ignored); leaving it empty is fine.
What the full scan adds
- All 34 checks in one pass — one URL, every category, a single report.
- Evidence on every row: the values found, why it fails, the fix, and a deep link per check.
- Your score against the global distribution — see where you stand.
- Sign in and the report is kept for 1 year; anonymous reports expire after 7 days.
Official source: DNS-AID draft · Rule: agent-readiness v1 · checker library
Tracking a Google update? Run the update impact check or read the search update radar.
Frequently asked questions
Is the DNS agent index checker free?
Yes — one free run without an account, with an anonymous preview. Sign in to save the full report and keep the evidence.
How often should I run it?
After every deploy that touches routing, templates or the checked file — and after each Google core update, to confirm nothing regressed.
Does the check run JavaScript?
No — it reads the no-JS response only, exactly what a crawler or AI agent sees when it fetches the URL.
How is this different from a full audit?
This page runs one check with its full criteria and fix notes. The free full scan runs every category at once and keeps the evidence per URL — use it once you know which checks matter.