how to connect get/post data to web service with w8.1 phone

Heres api

   $("#new_create").click(function () {
            var secret = $("#new_secret").val();
            $("#new_channel").val("");
            $("#status").html("");

            $.ajax({
              url: "/api/RegisterChannel/" + secret,
              success: function (data) {
                    if (data) {
                        $("#new_channel").val(data.Channel);
                        $("#status").html("Channel created.");
                    }
                }
            });
        });

        $("#send_message").click(function () {
            var channel = $("#channel").val();
            var message = $("#message").val();
            $("#status").html("");                
            $.ajax({
              url: "/api/SendMessage/" + channel + "/" + message,
              success: function (data) {
                    if (data) {
                        $("#status").html("Message sent.");
                    }
                }
            });

            $("#message").val("");
        });

        $("#read_receive").click(function () {
            var channel = $("#read_channel").val();
            var secret = $("#read_secret").val();
            $("#status").html("");
            $.ajax({
                url: "/api/FetchMessages/" + channel + "/" + secret,
                success: function (data) {
                    if (data) {
                        var html = "<b>Fetched messages:</b> <br />";
                        for (var i = 0; i < data.length; ++i ) {
                            var item = data[i];
                            var msg = item.Content;
                            html += "<hr />";
                            html += "<div>Time: " + item.TimeStamp + "</div>";
                            html += "<div><br /></div>";
                            html += "<div>Message: <br />" + msg + "</div>";
                        }

                        $("#status").html(html);
                    }
                }
            });
        }

I am developing w8.1 phone app that is going to use this. Frontend is done,but i dont know how to make app communicate with this service. exp when i press button send msg, which piece of code should be executed?