creation of an end-point in the Application Server REST API

Hi, I’m new here and I’m new to servers so sorry if it’s a silly question.
I would like to know if it is possible for me to create an extra end-point in this api!

Thank you all in advance, every answer is welcome!

That is possible, but you would need to make source-code modifications. You will find all API definitions here: https://github.com/brocaar/chirpstack-api/.