How to get all custom Fields details by using Rest API ?

Question

I want to get all custom fields details in jira cloud by using script runner.

Get all used and unused Custom Fields Details.

I am using this API GET /rest/api/3/field but its not showing correct result .

only show some specific fields not showing all fields details.

Prince Nyeche - ELFAPP · Answer

That endpoint will return all custom fields within Jira. Are you able to count the total number of custom fields that is returned and compare with the number you have on your instance?