GuardRails MCP Server: Install & Setup

Install GuardRails in Claude Code

Claude Code

claude mcp add tam-ds-guardrails -e GUARDRAILS_DATA_DIR=... -- uvx guardrails-mcp

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

{
  "mcpServers": {
    "tam-ds-guardrails": {
      "command": "uvx",
      "args": [
        "guardrails-mcp"
      ],
      "env": {
        "GUARDRAILS_DATA_DIR": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the GuardRails MCP server do?

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

Is the GuardRails 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 GuardRails run locally or remotely?

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

How do I add GuardRails to Claude Code?

Run: claude mcp add tam-ds-guardrails -e GUARDRAILS_DATA_DIR=... -- uvx guardrails-mcp

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