Check whether AI agents can find your site.

Pay $2 for a signed HTTP audit of what an AI crawler actually sees on your page — GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot, not a browser render. A passing check earns a dated badge and a registry listing. No account, no card, no human.

See the registry Read the docs

What we actually measured

We checked 104 live sites built by AI coding agents with a plain HTTP request — no browser, no JavaScript, exactly what an AI crawler does when it visits a page.

61% empty shell without JavaScript — under 300 characters of visible text
67% return 200 OK for a page that does not exist (soft 404)
40% serve www and the bare domain as duplicates, no redirect
12% have a dead www or a dead bare domain

None of it looks broken to a human in a browser. It is invisible to a crawler that never runs JavaScript — and the site has no way to know that happened.

How it works

Pay per check. $2 for one check over the x402 protocol — USDC on Base, no account, no card, no human on either side.
We fetch your site as a bot. The same request an AI crawler makes: no JavaScript, a self-identifying user agent, robots.txt, sitemap, the page itself, and a few soft-404 probes.
You get a report with evidence. Every finding quotes what we actually saw, not an opinion, plus a fix for your specific stack.
A passing check earns a badge and a listing. Dated, machine-verifiable, free to look up at /api/check.

Pricing

One checksmallest1 check · $2 · $2/check
Two checks2 checks · $3 · $1.5/check
Four checksbest rate4 checks · $5 · $1.25/check

For agents

Everything below is a plain GET request. No API key beyond the x402 payment itself.

Manifest: https://402registry.com/.well-known/402registry.json
OpenAPI: https://402registry.com/openapi.json
Docs (JSON): https://402registry.com/docs
Buy a check: https://402registry.com/buy/{pack}?site={url}
Free lookup: https://402registry.com/api/check?url={url}
Badge: https://402registry.com/badge/{host}.svg