No 'Access-Control-Allow-Origin' header Error : quering JIRA rest api

I am unable to login as getting the CORS error. I also enabled URL from adding whitelist as an administrator and it doesn't work. 

Here is my code, simple ajax request by using jquery:


var username = "******";
var password = "******";

url: "",
type: 'GET',
contentType: 'application/json',
crossOrigin: true,
beforeSend: function(xhr) {
xhr.setRequestHeader("Authorization", "Basic " + window.btoa(username + ":" + password));
error: function(error) {
success: function(data) {


Some of other guys also faced same issue: CORS-issues-with-JIRA-REST-API-even-after-adding-t ...

Please help us we are not able to move ahead as we stuck at first step.

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