Sprite Studio possesses a built-in Reference Section immediately available by selecting "Sprite Studio API" from Sprite Studio's "Help" Menu.
The Reference Section contains in depth coverage of the Sprite Studio scripting API, including the entire list of object Methods and Global Data (variables).
It also presents several invaluable scripting topics and discusses how to work with Pre-Fab items from within your scripts.
Sprite Studio Methods, by Object and Class
Sprite Studio Data: Global Variables, Identifiers and Tables