Wasted said: What's api The Roll20 API is a system available to Pro level subscribers that lets you add JavaScript code to your campaign, expanding Roll20's capabilities. A script can be fairly generic, such as HoneyBadger's excellent Power Cards script which is essentially an alternative to the existing template system, or it can be specific to a single game system, or even a single campaign. If you're not a programmer but you want to make use of the API, there are a ton of scripts written by other users which are, by and large, plug-'n-play.