Zephyr Scale for Jira Cloud REST API - Retrieve LastModified Timestamp for Test Case

[Winston_Dang]

Hi Jira forum,

We are using Jira Cloud with the Zephyr Scale addon for testcases.  I wrote a small Java application that repeatedly polls the Zephyr REST API and downloads the test cases into my organization:

https://api.zephyrscale.smartbear.com/v2/testcases

REST API (overview) | Zephyr Documentation

 The problem is that the Zephyr REST API to list test cases doesn't return the last_modified_date.  There is a "CreatedOn" field, but no "ModifiedOn" field in the response JSON.

      "createdOn": "2026-01-21T15:02:40Z",
      "objective": "Test",
      "labels": [],
      "component": {
        "self": https://<my jira>.atlassian.net/component/2143,
        "id": 2143
      },

How do I retrieve the last_modified_date from the Zephyr or Jira REST API for test cases?  I don't want each poll to repeatedly re-process testcases.  It would create duplicates or cause unneeded processing.