That’s what it said

Free forever. No plan.

Find out which AI crawlers actually reach you, and which ones you are turning away.

Your analytics cannot see this. A crawler that is refused leaves no trace in it, so a site can be invisible to ChatGPT for a year and look completely healthy.

Talk to us about the sensor

No plan, no trial, no expiry. If you never buy anything, you keep it.

Three steps.

  1. 1

    Add it at your edge

    One Cloudflare Worker, a WordPress plugin, or a log drain. It sits in front of your site and reads the requests that were already arriving.

  2. 2

    We verify every claim

    A request saying it is GPTBot is checked against OpenAI's published address ranges. Anything that fails is recorded as a spoof, because that is worth knowing.

  3. 3

    You see what AI actually fetched

    Which agents reached you, which URLs they asked for, what they got back, and what was blocked. Updated as it happens.

Why it matters

Roughly 41% of B2B sites still block at least one major AI bot.

Most of it is left over from 2023, when blocking AI crawlers was the default advice. Nobody turned it back off, because nothing tells you it is still on.

Source: our own measurements across audited sites, 2026. Directional, not a survey.

What it does not collect.

It runs in front of your traffic, so this list matters more than anything else on the page.

  • No human visitor traffic. Ever. It is filtered at your edge before anything leaves.
  • No cookies, sessions, or logins.
  • No page content, request bodies, or response bodies.
  • Addresses are replaced with a keyed hash before they reach us.

It also never blocks or slows a request. If the sensor fails for any reason, the request passes through untouched.

Why we give it away

Because we want the install, not the subscription.

Other tools put this behind an enterprise plan. We would rather it was everywhere: it makes your own diagnosis provable rather than inferred, and across enough sites it becomes the only real record of how AI systems fetch the web. That trade is plainly in our interest, so we are saying so rather than calling it generosity.

Talk to us about the sensor