mcpsnoop — 'Wireshark for MCP' — Ships as a Zero-Config Single Binary
TechTimes·high signal
Posted to Show HN and pushed to GitHub on July 4, mcpsnoop is a transparent proxy that sits between an AI coding agent and its MCP servers, forwarding traffic to the real client while mirroring every JSON-RPC frame to a live terminal view. It targets a real pain point: diagnosing when an agent silently skips a tool call, hangs, or negotiates an unexpected capability set. As MCP becomes plumbing for agent stacks, first-class observability tooling like this is exactly what production builders lack today.