API / monitoring freshdesk through PRTG

I would like to monitor number of pending tickets remotely through some sort of API and show it in my PRTG network monitoring web map. I don’t need someone to hold my hand through the process, but a little poke in the right direction would be greatly appreciated. Do I need to pay for some freshdesk level to get the API? (that’s fine if so). I am currently the free user and can’t see anything that would help me accomplish this in settings.