The MCP Observer is a new feature in the open-source Coding Agent Explorer (.NET) that acts as a transparent HTTP proxy between Claude Code and any MCP server. It captures all JSON-RPC 2.0 traffic in real time and displays it in a dashboard with both raw JSON and formatted views. The post covers how MCP works, the difference between HTTP and STDIO transports, step-by-step setup instructions, and practical examples using Microsoft Learn and Context7 MCP endpoints. It also explains how the MCP Observer complements Claude Code's PreToolUse/PostToolUse hooks for full agent visibility.
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