- Navigate to Jira REST API Browser.
- Add this link ↓ to search field at the left corner.
- amoeboids-upraise/1.0/okr/objective/{id}/comment
- Enter an objective id and click on 'send' to request data.

Once you send objective id, this API extracts all comments, their timestamps & creators from objective and returns all of that data as shown in above image. Otherwise returns appropriate errors for invalid id/ objective deleted or user has no access to view that objective.