My requirement is to create a custom Gitlab quick action named say ‘test_action’. When user types /test_action and presses submit, then I need to invoke a web service and pass the data.

I am not sure whether it is possible in Gitlab?

I have come across quick actions documentation
https://docs.gitlab.com/ee/user/project/quick_actions.html

But it does not have anything for my requirement.

Thanks in advance