var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://ancientbrain.com', true)
xhr.setRequestHeader('content-type', "application/x-www-form-urlencoded")

xhr.onreadystatechange = function() {
  if (xhr.readyState == 4) {
    console.log(JSON.parse(xhr.responseText));
  }
}

xhr.send()