prompt-lab-mcp

MCP server giving Claude Code automated prompt optimization loops and regression test suites — iteratively improve a system prompt against a target answer, or validate it across a full test suite, alongside a web UI for entering queries, test cases, and system prompts.

{
  "mcpServers": {
    "prompt-lab-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jurek-f/prompt-lab-mcp"
      ]
    }
  }
}

claude mcp add prompt-lab-mcp npx -y jurek-f/prompt-lab-mcp

{
  "mcpServers": {
    "prompt-lab-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jurek-f/prompt-lab-mcp"
      ]
    }
  }
}