Howard Miller

If you scan the Moodle code, you will find multiple places where it acts as an HTTP client for various tasks. The HTTP User-Agent header (see https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/User-Agent) is set to the string 'MoodleBot/4.5' (in Moodle 4.5 anywhere). This header is there to "identify the application, operating system, vendor, and/or version of the requesting [application]". So, I'm assuming that this is Moodle itself. But I can't identify which bit of Moodle.

Unless somebody is doing something very weird...

'MoodleBot' isn't a *thing*. It's what the Moodle http client(s) identify themselves as. As far as I can tell, there's an old one and a new one that uses the Guzzle library. Both identify themselves as 'MoodleBot' (plus the version number). So, from the information we have, it's very hard to tell from where in Moodle this might have originated.

A very long shot... have you got AI switched on?

I'm properly guessing now

I didn't say that it serves no use. I said that it's deprecated for new code. It still seems to be used all over the place.

You're probably better to make a new post with your full details.