The Category object performs division or classification of records in the Communifire system. It includes the Category ID that is used to make reference to the particular category throughout the system. Each Category ID is unique and automatically generated. Categories are used to make sub-groups of Entities say Articles, Blogs, etc.
Please Note Refer this wiki on how to create a new content category via REST API.
is requesting access to a wiki that you have locked: https://my.axerosolutions.com/spaces/5/communifire-documentation/wiki/view/4776/rest-api-category-overview