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by traviscline 399 days ago
In the current state you can insert “mcpspy” in front of a server and it intercepts and streams out a plain text format that’s nice for humans and machines. There’s also a replay tool that emulates previous traffic, including in mock client and server modes, and a diffing program that is mcp protocol aware.

Oh, and most importantly, a vim syntax plugin for the .mcp file format.

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https://github.com/tmc/mcp/blob/next/cmd/mcpdiff/testdata/sc...

This is what the tests look like, for both the tools and to validate the servers.