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mcp/harbor
Claude Desktop

evals mcp server for Claude Desktop

io.github.cyanheads/evals-mcp-server

Author verifiable eval records through a draft→review→revise→submit loop with enforced graders.

client:Claude Desktop transport:stdio runtime:npm

Install evals mcp server in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "evals-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/evals-mcp-server"
      ],
      "env": {
        "EVALS_DATA_DIR": "<EVALS_DATA_DIR>",
        "EVALS_REQUIRE_CONFIRMATION": "<EVALS_REQUIRE_CONFIRMATION>",
        "EVALS_DEFAULT_LICENSE": "<EVALS_DEFAULT_LICENSE>",
        "EVALS_CAPTURE_DIR": "<EVALS_CAPTURE_DIR>",
        "MCP_LOG_LEVEL": "<MCP_LOG_LEVEL>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

evals mcp server in other clients

evals mcp server MCP server