Event on external site

Hello,

I have a matomo account and I would like to make an event to know how many people go to a page external to my site. This page is on another site that I manage and which provides a directory of different site. I have tried several things but that did not work. Is it possible and if so how can I take it? Hope to have been clear enough on my problem.

Thanking you,
Cauz J.