How to get the API JSON files for the Project & Task Management

I am using Windchill PDMLink Release 12.1 and Datecode with CPS 12.1.2.5

How to get the API JSON files for the Project (Create, Update, and Delete actions) & Task Management (task update and completion action)

Here are the errors that I faced
How to get the API JSON files for the Project (Create, Update, and Delete actions) & Task Management (task update and completion action)