Choose which AI crawlers may use your site and get a robots.txt file that's ready to upload. Your existing rules are kept.
If your site already has a robots.txt file, load it so your current rules are kept. Without it, the new file replaces everything.
AI training – Collect pages to train AI models.
AI search – Index pages so AI assistants can find, cite and link to them.
User-triggered – Fetch a page when someone asks an AI assistant about it.
Not sure what a crawler does? See the AI crawler list.
One path per line, starting with /. Your rules for all bots are copied in too, because a crawler with its own rules ignores the general ones.
Upload it to the root of your site so it's at https://yourdomain.com/robots.txt, then check it with the robots.txt checker. Each subdomain needs its own file. Crawlers usually pick up changes within a day.