Sending multi responses to single request with time delay using REST protocol

Hi All,
We have a requirement that when a single endpoint is called once, three responses to the same request must be generated, each with a 5 second time delay. We are conscious of the fact that REST/synchronous calls do not permit multiple answers to a single request.

But, kindly let us know is there a method to send multiple response to a single request while only accessing the endpoint once?