I could use your help.

In which context Could is used here. Is it request or possibility or anything else.


It literally refers to possibility, but the sentence is normally understood as a request.

virat1971I could use your help.

~ I would be able to use your help if you gave it (your help) to me.

It's a polite (i.e., indirect) request for help.

Instead of saying "Help me", it says that I would find your help useful. The other person is supposed to put 2 and 2 together and get 4.