C#

This is just a starting point to build upon.

Download the last 25 messages in ERROR

using System;
using System.Text;
using System.Net;
using System.IO;

namespace RESTClient
{
class Program
{
static void Main(string[] args)
{
string baseURL = "https://www.babelway.net/SelfService3/rest/v2/";
long myHub = 0; // You can find this on the My Account page
String user = "";// the username you use to connect to Babelway
String pwd = ""; // the password you use to connect to Babelway            

// Download the last 25 messages in ERROR
String request = baseURL + "hub-" + myHub + "/messages.xml?status=ERROR";

HttpWebRequest webRequest = WebRequest.Create(request) as HttpWebRequest;

// Add authentication to request
webRequest.Credentials = new NetworkCredential(user, pwd);

// Get Response
HttpWebResponse response = webRequest.GetResponse() as HttpWebResponse;

// Read the result
if (webRequest.HaveResponse == true && response != null)
{
// Get the response stream  
StreamReader reader = new StreamReader(response.GetResponseStream());

// Console application output  
Console.WriteLine(reader.ReadToEnd());
}
}
}
}