Does your site let AI agents in?
Most checkers only read your robots.txt. This one also knocks on your door as a browser, as OpenAI's crawler, ChatGPT, Perplexity and Claude, and shows what your server actually did. The two often disagree.
Why both matter
robots.txt is a request: well-behaved agents obey it, so a Disallow line keeps them out even when the server would let them in. A firewall or bot-protection rule is a refusal: it returns 403 or a challenge page to anything it doesn't recognise, regardless of robots.txt. Stores often have the first right and the second wrong, which is why we test both. Free, no sign-up, nothing is changed on your site.