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Title: fix(server): exit cleanly on KeyboardInterrupt in MCPServer.run by devansh-dek · Pull Request #3027 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix(server): exit cleanly on KeyboardInterrupt in MCPServer.run by devansh-dek · Pull Request #3027 · modelcontextprotocol/python-sdk

X Title: fix(server): exit cleanly on KeyboardInterrupt in MCPServer.run by devansh-dek · Pull Request #3027 · modelcontextprotocol/python-sdk

Description: Summary Catch KeyboardInterrupt at the MCPServer.run() sync boundary so Ctrl-C during stdio server execution exits cleanly instead of printing a noisy anyio/asyncio cancellation traceback. Adds unit tests verifying KeyboardInterrupt is suppressed while other exceptions still propagate. Test plan uv run pytest tests/server/mcpserver/test_server.py::TestServer::test_run_suppresses_keyboard_interrupt tests/server/mcpserver/test_server.py::TestServer::test_run_reraises_other_exceptions -v uv run ruff check src/mcp/server/mcpserver/server.py tests/server/mcpserver/test_server.py Fixes #2663

Open Graph Description: Summary Catch KeyboardInterrupt at the MCPServer.run() sync boundary so Ctrl-C during stdio server execution exits cleanly instead of printing a noisy anyio/asyncio cancellation traceback. Adds un...

X Description: Summary Catch KeyboardInterrupt at the MCPServer.run() sync boundary so Ctrl-C during stdio server execution exits cleanly instead of printing a noisy anyio/asyncio cancellation traceback. Adds un...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/3027

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ac3f477 fix(server): exit cleanly on KeyboardInterrupt in MCPServer.run devansh-dek Jun 30, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/3027/commits/ac3f477075bfbcf7877e7087d4928fd9cd23f76b
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