fix: ThreadingHTTPServer + unbuffered stdout + correct endpoint URL

server.py

@@ -6,6 +6,7 @@ import queue
 import threading
 import uuid
 from http.server import HTTPServer, BaseHTTPRequestHandler
+from socketserver import ThreadingMixIn
 from urllib.parse import urlparse, parse_qs
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
@@ -259,10 +260,10 @@ class MCPHandler(BaseHTTPRequestHandler):
         self.send_header("Connection", "keep-alive")
         self.send_header("Access-Control-Allow-Origin", "*")
         self.end_headers()
-        # Send endpoint info
-        endpoint_msg = {"jsonrpc": "2.0", "method": "endpoint",
-                        "params": {"uri": f"http://0.0.0.0:{PORT}/messages?client_id={client.id}"}}
-        self.wfile.write(f"event: endpoint\ndata: {json.dumps(endpoint_msg)}\n\n".encode())
+        self.wfile.flush()
+        # Send endpoint event immediately per MCP SSE spec
+        msg_url = f"http://192.168.86.11:{PORT}/messages?client_id={client.id}"
+        self.wfile.write(f"event: endpoint\ndata: {msg_url}\n\n".encode())
         self.wfile.flush()
         try:
             while True:
@@ -331,12 +332,16 @@ class MCPHandler(BaseHTTPRequestHandler):
         self.end_headers()
         self.wfile.write(body)
 
+class ThreadingHTTPServer(ThreadingMixIn, HTTPServer):
+    daemon_threads = True
+
 def main():
     db.init_db()
-    server = HTTPServer(("0.0.0.0", PORT), MCPHandler)
+    server = ThreadingHTTPServer(("0.0.0.0", PORT), MCPHandler)
     print(f"Handoff Pro MCP server running on port {PORT}")
     print(f"SSE endpoint: http://0.0.0.0:{PORT}/sse")
     print(f"Tools registered: {len(TOOLS)}")
+    sys.stdout.flush()
     server.serve_forever()
 
 if __name__ == "__main__":