I've created an simple AJAX call tho get JSON data from an cross domain URL. With the real URL i run allways in an error, an example with another cross domain call is running successful.
var json_url_1 =  'http://operation-wigwam.ingress.com:8080/v1/test-info?callback=parseResponse',
    json_url_2 =  'http://operation-wigwam.ingress.com:8080/v1/test-info',
    json_url_3 =  'https://jsonplaceholder.typicode.com/users/1';
$('#real1').click(function(){
    $.ajax({
        type: "GET",
        dataType: "jsonp",
        url: json_url_1,
        xhrFields: {
            withCredentials: false
        },
        success: function( data ){
            console.log( data);
       },
       error: function() {
           console.log( 'an error occurred');
       }
    });
});
$('#real2').click(function(){
    $.ajax({
        type: "GET",
        dataType: "jsonp",
        url: json_url_2,
        xhrFields: {
            withCredentials: false
        },
        success: function( data ){
            console.log( data);
        },
        error: function() {
            console.log( 'an error occurred');
        }
    });
});
$('#example').click( function(){
    $.ajax({
        type: "GET",
        dataType: "jsonp",
        url: json_url_3,
        xhrFields: {
            withCredentials: false
        },
        success: function( data ){
            console.log( data );
        },
        error: function() {
            console.log( 'an error occurred');
        }
    });
});
What's going wrong with the original URL?
Example here: http://jsbin.com/cesehiy/edit?js,console,output
