Hi,
It’s possible you could use the Web APIs to script this.
The best way to master the API is to perform the desired action via the UI and eavesdrop to see which calls the UI made to accomplish the action.
You may also find this guide helpful.
Regarding your version, it’s past EOL. You should upgrade to either the latest version or the current LTS at your earliest convenience. Your upgrade path is:
8.9.2 → 9.9.2 → 10.2.1 (last step optional)
You may find these resources helpful:
If you have questions about upgrading, feel free to open a new thread for that here.
HTH,
Ann