Set route in net core api

Hi all, how do I set a route ( or attribute or whatever ) so I can call this method which is present in a net core api controller ? assume my controller is called MyController - I've googled endlessly and can't find a simple answer

I would like to be able to access it something like this

myipaddress:myportnumber/MyController/1

public ActionResult<Actuator> GetAValue(int id)
{
// businesslayer is my DAL and is instantiated in my controller c'tor
    return businessLayer.GetAValue(id);
}