LocalFree

Umbra MCP server

elberacasa/umbra

Trust scores and guardrails for AI-generated code: static security rules, Docker-verified build/boot checks and receipts that catch agents lying about tests.

1 GitHub stars
Source code

Install Umbra in Claude Code

Claude Code
claude mcp add umbra -- npx -y @elberacasa/umbra
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "umbra": {
      "command": "npx",
      "args": [
        "-y",
        "@elberacasa/umbra"
      ]
    }
  }
}

Frequently asked questions

What does the Umbra MCP server do?

Trust scores and guardrails for AI-generated code: static security rules, Docker-verified build/boot checks and receipts that catch agents lying about tests.

Is the Umbra 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 Umbra run locally or remotely?

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

How do I add Umbra to Claude Code?

Run: claude mcp add umbra -- npx -y @elberacasa/umbra

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