fix: update MCP server config and add API key support

- Fixed configuration issues in `math_server.py`
- Integrated API key handling for secure server access

examples/mcp_example/math_server.py

@@ -36,4 +36,4 @@ def calculate_percentage(part: float, whole: float) -> float:
 
 if __name__ == "__main__":
     print("Starting Math Server on port 6274...")
-    mcp.run(transport="sse", transport_kwargs={"host": "0.0.0.0", "port": 6274})
+    mcp.run(transport="sse", host="0.0.0.0", port=6274)