Show HN: Mcpsnoop – Wireshark for MCP (transparent proxy and live TUI)

- MCP (Model Context Protocol) is an open protocol developed by Anthropic that lets AI models like Claude interact with external tools and data sources (e.g., databases, file systems, APIs). It works through a client-server architecture. - Mcpsnoop is a new open-source tool that acts as a transparent proxy between an MCP client and server, letting developers inspect, replay, and debug the JSON-RPC messages flowing between them — similar to how Wireshark works for network traffic. - The tool provides a live terminal UI (TUI) to monitor MCP conversations in real-time, which is useful for anyone building or debugging applications that use AI agents to call external tools. - Prior to Mcpsnoop, debugging MCP interactions meant adding logging manually or using generic HTTP proxies; this is the first dedicated "sniffer" for the MCP protocol.