Hello, thanks for your reading, I will try my best to answer your question.

Normally you can call the second api from postman without any problem.

In my exemple I have 2 distinct springboot application running :

- the first on 8080 who use the client

- the second on 8082 described by the client

With postman when I call my localhost:8082 endpoint I have a response.

So make sure that the API referenced by the client is running, if it's not you should have a Error: connect ECONNREFUSED message.

If it's running what HTTP response code do you have ?