You can use substitutions to use variable values (such as information about the server, folders, or parameters to the API function) in your settings.

To substitute, place the name of a variable between square brackets. For example, '[ROOT]' becomes the name of the folder where your function keeps its data files.

Each of your property values are available via their 'tag' name. For example, a property with the tag 'message' could be used with the following…

http://send.my.message/api?content=[message]

These are mostly used in your info.json file.