AutoHotkey Webinar 06/2017 Hour 2-Web services / API calls: Q&A

Great video. What kind of API is used when registering say, Adobe products and it's a 30 day subscription? I'm interesting in integrating API in my AHK script/Software that requires a token from my website to run the script. The activation key/token is valid 30 days, paid for through PayPal. Is this considered API or some other type of programming function? I see GET and POST in your webinar. But does your AHKscript support DELETE? The API website called Hoppscotch has PUT. What's the difference between PUT and POST?