The machines
Who sends each one, what it's for, and whether it renders JavaScript.
Anyone can say they're Googlebot
How to check the machines that publish a way to verify them, and what to do about the ones that don't.
robots.txt for AI answer engines
Training, search and on-demand fetches come from different machines. Block each one on purpose.
What a machine sees decides what it can cite
A page that renders in Chrome can arrive empty for a machine that doesn't run JavaScript. A site that blocks one AI crawler can still be fetched by the same company's on-demand agent.
Machine experience starts with knowing which machine is which, and what each one gets when it arrives. Every page here names the machine, its operator and the operator's own source.
What a machine sends
As Google documents it. W.X.Y.Z is the Chrome version Googlebot renders with, which follows the current stable release.
How this site works
This site records how each visiting machine connects and what it does here, and these pages grow from what it sees. Records are deleted after 90 days.