workItemPage.js

VSS.require(["TFS/DistributedTask/TaskAgentRestClient"], function(RestClient) {
  var webContext = VSS.getWebContext();
  var client = RestClient.getClient();
  
  client.getServiceEndpoints(webContext.project.id).then(
    function(endpoints) {
      // ...
    },
    function(error) {
      console.log('error getting service endpoints:', error);
    }
  );
});