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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"MCP Server with Python on Claude Desktop Never Exits","articleBody":"**Describe the bug**\nWhen using an MCP Server (stdio) installed in Claude Desktop with the command ```uv run mcp istall server_test.py``` and then closing Claude Desktop, the process mcp.exe remains active in Task Manager on Windows 10.\nIf you open and close Claude Desktop again, the number of lingering mcp.exe processes increases.\n\n**To Reproduce**\nSteps to reproduce the behavior:\n1. Install ```server_test.py``` using the command above.\n2. Open Claude Desktop and ensure the MCP server is correctly set up.\n3. Close Claude Desktop and check Task Manager for ```mcp.exe```  or ```python.exe``` still running.\n4. Repeat steps 2 and 3 to see the processes being duplicated.\n\n**Expected behavior**\nThe process should exit cleanly when Claude Desktop is closed.\nI tested the MCP server provided by the C# SDK, and it exits correctly — so the issue might be specific to the Python implementation or FastMCP.\n\n**Screenshots**\n![Image](https://github.com/user-attachments/assets/0b9e792b-62b6-413b-9645-65955eba11e4)\n\n**Desktop**\n - OS: Windows 10\n - Python 3.13.3\n - Claude Desktop version 0.9.2\n - mcp[cli]\u003e=1.6.0\n - uv 0.6.13","author":{"url":"https://github.com/RodrigoPAml","@type":"Person","name":"RodrigoPAml"},"datePublished":"2025-04-16T01:16:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/526/python-sdk/issues/526"}