On our public docs page you can find information under the Skyline.DataMiner.Scripting section:

https://docs.dataminer.services/develop/api/types/Skyline.DataMiner.Scripting.html

If you want more details information regarding for example protocol calls inside a QAction can also be found on the docs, here is also also a link to it:

https://docs.dataminer.services/develop/api/types/Skyline.DataMiner.Scripting.SLProtocol.html

This is an example that can be found on the docs for a GetParameter call in a QAction:

https://docs.dataminer.services/develop/api/types/Skyline.DataMiner.Scripting.SLProtocol.GetParameter.html

There is also some information available in the courses, in the HTTP basics is a section where is being showed how to manipulate data in a table:

https://community.dataminer.services/courses/dataminer-connector-integration-http-basics/