Mod (formerly called API) scripts are not inherently game or character sheet specific. Some scripts are written for specific character sheets, but others are system & sheet agnostic. Two great examples of sheet agnostic scripts are TokenMod and ChatSetAttr. TokenMod will work for any game that uses tokens, and many of its features work when tokens are linked to character sheets. ChatSetAttr requires a character sheet to be selected for the game, but any character sheet will do. TokenMod adjusts values on Tokens, and if those values are linked to a character sheet, then the linked values on the character sheet will be changed when the token is adjusted. ChatSetAttr solely works on character sheet attributes. Edit: Scott C. has a better explanation of ChatSetAttr below! There are many other examples of scripts that may do things that don't rely on character sheets, such as a script that makes a token follow another token, or scripts that will automatically play music or sounds when a players are moved onto a page. A pro subscription also has other benefits besides Mod scripts, such as an increase in storage space, use of the Transmogrifier, the ability to use custom character sheets, the use of the FX tool, and more .