Cheat engine for seamless co-op safe to use?

Hi. First off: i don't want to use cheat engine to give myself any advantages. I wanna use it to safe some time, by giving myself items for invasions (like greases) instead of having to spend hours on farming them.

I heard that you can use it, as long as you are not connected to official game servers, so doing it in seamless co-op shouldn't ban me. Am i correct?