Run HTTP POST request from chrome developer tools

Do this from developer mode console.

May need to load a page from the same domain to avoid cross domain validation failure.

var xhr = new XMLHttpRequest();
xhr.open('POST', 'http://url_here', true);
xhr.setRequestHeader('Content-type', 'application/json');
xhr.onload = function () {
// do something to response
console.log(this.responseText);
};
xhr.send('query_here');