Mcp Debug

This is a development tool that sits between your MCP client and the servers you're building. It lets you hot-swap server binaries without restarting your client session, so you can rebuild your Go or Node server and reconnect it while keeping the same tool names active. The proxy mode aggregates multiple servers with prefixed tool names and exposes management tools like server_add, server_remove, and server_reconnect for runtime control. It records all JSON-RPC traffic to JSONL files that you can replay later for regression testing. Reach for this when you're actively developing an MCP server and want faster iteration cycles than full restarts allow, or when you need to capture real client interactions for automated testing.