Pop up window to enter user input from windows service when localhost(localhost://1110/PostData) REST calls(POSTMAN, ARC)

Question

I have a requirement, when localhost call like [localhost://1110/PostData] to windows service., User Input box has to popup from windows service and need to take the input from there. Currently I have created the windows service and it takes the input(URL) from the specific application and giving the proper output.

But I should be able to Pop up window to enter user input from any of the REST POST tools by calling the locahost URL.