pagespeed.js

var psi = require('psi');
var testUrl = 'http://www.expedia.com/Cancun-Hotels.d179995.Travel-Guide-Hotels?psislp=1';

module.exports = {
    getScore: function() {
        psi(testUrl, function (err, data) {
            console.log(data.score);
        });
    }
};