list-web-apps.js

// Perform the AJAX request (make sure you've set the access token  
var request =
    $.ajax({
        url: "/api/v2/admin/sites/current/webapps",
        type: "GET",
        headers: {
            "Authorization": access_token
        },
        contentType: "application/json"
    });
// Request successful, response is in "msg" variable  
request.done(function (msg) {
    console.log("Request successful");
    console.log(msg);
}); // Request failed, you can add your own error handling  
request.fail(function (jqXHR) {
    console.log("Request failed. Error code: " + jqXHR.status);
});