Set up cerbos-fastmcp in Claude Desktop

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Cerbos authorization middleware for FastMCP servers.

01Configuration

{
  "mcpServers": {
    "cerbos-fastmcp": {
      "command": "uvx",
      "args": [
        "cerbos-fastmcp"
      ]
    }
  }
}

Add this to claude_desktop_config.json. Generated from the captured install method (uvx); the mcpServers shape is shared across Claude Desktop, Cursor, Windsurf, Cline, and VS Code.

02Steps

Make sure Claude Desktop is installed and up to date.
Open claude_desktop_config.json and add the block above (merge into any existing mcpServers).
Provide any required API keys/credentials as environment variables.
Restart Claude Desktop and confirm cerbos-fastmcp’s tools appear.

03Other runtimes

Cursor Windsurf Cline Continue Goose VS Code OpenAI Agents SDK LangGraph CrewAI

04Provenance

config_sourcegenerated from captured install method

last_checked2026-06-29 07:26Z

sourcesPyPI [p4]

Next step

Ship cerbos-fastmcp to your agents as a governed Loadout — config, scopes, and approval rules in one place.

Build a Loadout

See also: server page · is it safe? · alternatives