diff --git a/OpenCS2hock/GSIServer.cs b/OpenCS2hock/GSIServer.cs
new file mode 100644
index 0000000..1976921
--- /dev/null
+++ b/OpenCS2hock/GSIServer.cs
@@ -0,0 +1,52 @@
+using System.Net;
+using System.Text;
+
+namespace OpenCS2hock;
+
+public class GSIServer
+{
+    private HttpListener HttpListener { get; init; }
+
+    public delegate void OnMessageEventHandler(string content);
+
+    public event OnMessageEventHandler? OnMessage;
+
+    private bool keepRunning = true;
+
+    public GSIServer(int port)
+    {
+        HttpListener = new HttpListener();
+        HttpListener.Prefixes.Add($"http://127.0.0.1:{port}");
+        HttpListener.Start();
+
+        Task connectionListener = HandleConnection();
+        connectionListener.GetAwaiter().GetResult();
+        
+        HttpListener.Close();
+    }
+
+    private async Task HandleConnection()
+    {
+        while (keepRunning)
+        {
+            HttpListenerContext context = await HttpListener.GetContextAsync();
+            HttpListenerRequest request = context.Request;
+            
+            Console.WriteLine($"[{request.HttpMethod}] {request.Url} - {request.UserAgent}");
+
+            HttpResponseMessage responseMessage = new HttpResponseMessage(HttpStatusCode.Accepted);
+            context.Response.OutputStream.Write(Encoding.UTF8.GetBytes(responseMessage.ToString()));
+            await context.Response.OutputStream.DisposeAsync();
+
+            StreamReader reader = new StreamReader(request.InputStream);
+            OnMessage?.Invoke(await reader.ReadToEndAsync());
+            reader.Close();
+            await request.InputStream.DisposeAsync();
+        }
+    }
+
+    internal void Dispose()
+    {
+        keepRunning = false;
+    }
+}
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