مشکلی در api

سلام من api من چنین مشکلی داره ، چجوری بر طرفش کنم

Access to XMLHttpRequest at 'http://cat-fact.herokuapp.com/facts/random' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

اینم کدم

console.log("hello cat")
var request = new XMLHttpRequest();

var url = "http://cat-fact.herokuapp.com/facts/random";

request.open("GET",url,false);
request.send();

var respone = request.respone;
response.addHeader("Access-Control-Allow-Origin", "*");
var data = JSON.parse(request);

console.log(data);