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Build Preflight

If you haven’t already, clone and build the server:

git clone https://github.com/EthanAckerman-git/Preflight.git
cd Preflight
npm install
npm run build

Add the Preflight config

Choose whether to configure Preflight globally (available in all projects) or only for a specific project:

Global (~/.cursor/mcp.json)
Per-project (.cursor/mcp.json)

Edit ~/.cursor/mcp.json, creating it if it doesn’t exist:

{
  "mcpServers": {
    "preflight": {
      "command": "node",
      "args": ["/path/to/Preflight/dist/index.js"],
      "env": {
        "PATH": "/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin"
      }
    }
  }
}

Create .cursor/mcp.json in your project root:

{
  "mcpServers": {
    "preflight": {
      "command": "node",
      "args": ["/path/to/Preflight/dist/index.js"],
      "env": {
        "PATH": "/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin"
      }
    }
  }
}

Replace /path/to/Preflight/dist/index.js with the absolute path to the built server on your machine.

If you installed idb via pip, add your Python bin directory to PATH. For example: /opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:~/Library/Python/3.x/bin

Verify in Cursor

Restart Cursor (or reload the window).
Open Settings → MCP.
Confirm that preflight appears in the list with a connected status.

Take a screenshot of the MCP settings panel after connecting — it’s a handy reference if you need to troubleshoot later.

Claude Code

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