Failure Lab MCP Server: Install & Setup

Install Failure Lab in Claude Code

Claude Code

claude mcp add failure-lab -- npx -y mcp-failure-lab

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "failure-lab": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-failure-lab"
      ]
    }
  }
}

Frequently asked questions

What does the Failure Lab MCP server do?

Deterministic fault-injection server for testing how MCP clients handle failures and recover.

Is the Failure Lab MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Failure Lab run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Failure Lab to Claude Code?

Run: claude mcp add failure-lab -- npx -y mcp-failure-lab

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