This is how I understood. Please correct me if I am wrong.
For an application that you are trying to build, you are looking for a response payload from Freshservice APIs with the information on key value pairs of
- Category Key and Value associated with it. Example,
"category":"Hardware" - Sub-Category Key and Value associated with it. Example, “Sub-Category”:“Computer”
- Item Key and Value associated with it. Example, “Item”:“PC”
May be focussing on two particular attributes may help,
/api/v2/ticket_fields
nested_fields
choices → nested_options
Might provide you what you could be looking for.