Hidden event from web page

I'm trying to automate some actions I've access to from a webpage, to overcome some API limitations (meaning: an API exists for most of the actions, but for a specific one I have the rights to, I need to manually go to the page, make a menu pop up and click on it). When I click on the command, nothing appears in the Network tab of dev tools of Chrome. Nothing is logged by Fiddler (except tracking info). Are there some special ways of communication that are not seen by dev tools ? What am I missing ?

Thank you in advance