About ZOHODESK Request API

About ZOHODESK Request API

This documentation of the ZOHODESK Request API is very brief: https://www.zoho.com/desk/extensions/guide/#request-api

Can someone point me to a more complete version of this documentation?

I'd like to confirm that:
- I can use placeholders in the request object using config values set during the installation.
- I can use placeholders to use secure values from config
- How should I set the values of postBody and data for POST and PUT requests. Do I need to provide both? I am trying to set the content-type to application/x-www-form-urlencoded and use a url encoded string, but without success