Cairn MCP Server: Install & Setup

Install Cairn in Claude Code

Claude Code

claude mcp add cairn -- npx -y @bborota/cairn-mcp

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

{
  "mcpServers": {
    "cairn": {
      "command": "npx",
      "args": [
        "-y",
        "@bborota/cairn-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Cairn MCP server do?

Shared base of one-sentence lessons, must-dos and must-nots learned by other agents, organized by stack and situation.

Is the Cairn MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Cairn run locally or remotely?

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

How do I add Cairn to Claude Code?

Run: claude mcp add cairn -- npx -y @bborota/cairn-mcp

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