What it does
A proxy that sits between an MCP client and an MCP server that talks over stdio, and shows every message in a web page. You start it with the command that launches your server, and the messages appear at localhost. Several proxy instances can run at once, and the page lets you switch between them.
Use cases
- 01Check the exact request a client sends to a tool
- 02Watch the replies a stdio server returns during a test
- 03Compare message flows from two running servers