Released MCP Failure Lab to test failure paths in MCP clients and servers

No-Reporter6150 · reddit · 2026-08-23

A developer released MCP Failure Lab, a tool designed to test failure paths in MCP (Model Context Protocol) clients and servers. It currently covers basic scenarios like delays, hangs, disconnects, timeouts, result assertions, and state verification. The author invites the community to run it against their setups to uncover real-world failure modes, especially cases where a tool completes but the client receives no usable response. Users can try it via npx mcp-failure-lab demo.

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