How to call internal REST endpoint from jquery-ajax

[Tharanga Thennakoon]

Hi i am developing atlassian-connect addon by using atlassian-connect-spring-boot. Now i want to call addon-web-application rest service from jquery-ajax. 

This is my jquery-ajax request.

AJS.$.ajax({
  type: "POST",
  dataType: "html",
  url: contextPath + "/products",
  data: {},
  cache: false,
  error: function(response, textStatus, errorThrown) {
    console.log('error response', response);
  } ,
  success: function(response, textStatus) {
    console.log('success response', response);
  }
});

I got 401 authentication-failure responce. Do i need to concat context-parameters for the requested url. If need how can i use context-parameters.  Could you please give me a solution to fix this issue.