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GuardRails-MCP

io.github.TAM-DS/guardrails-mcp ยท v0.1.1

Local prompt regression tracker with six fictional cases and evidence for human review.

Connect Runs on your machine

Terminal
claude mcp add guardrails-mcp -e GUARDRAILS_DATA_DIR=<GUARDRAILS_DATA_DIR> -- uvx guardrails-mcp==0.1.1
claude_desktop_config.json
{
  "mcpServers": {
    "guardrails-mcp": {
      "command": "uvx",
      "args": [
        "guardrails-mcp==0.1.1"
      ],
      "env": {
        "GUARDRAILS_DATA_DIR": "<GUARDRAILS_DATA_DIR>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "guardrails-mcp": {
      "command": "uvx",
      "args": [
        "guardrails-mcp==0.1.1"
      ],
      "env": {
        "GUARDRAILS_DATA_DIR": "<GUARDRAILS_DATA_DIR>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "guardrails-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "guardrails-mcp==0.1.1"
      ],
      "env": {
        "GUARDRAILS_DATA_DIR": "<GUARDRAILS_DATA_DIR>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
GUARDRAILS_DATA_DIR
Required
Absolute writable directory for local evaluation records. Use the same path in CLI and dashboard.

Details

Package[email protected] (PYPI, stdio)
First published16 Oct 2026
Last updated16 Oct 2026
Registry nameio.github.TAM-DS/guardrails-mcp

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