add +1 per repeated die

I have been recommended an API, so that in a roll when a repeated result is given to the higher die add a +1 for each repeated die. someone knows how I can create that api or if there is that basic function with the dice without API the basic die is this  /r 3d6k1

You cant do this with a standard dice macro, but it is doable with an API script. The simplest solution would be to check the Power Cards script (there's a thread for it in the API forum), and see if you can use that. Failing that you can ask someone to write a unique script for it. It wouldnt be too difficult, but checking Power Cards first would be best since there's no scripting involved, the script is already written.