Connecting Gemini CLI

With OAuth

Put this in ~/.gemini/settings.json:

{
  "mcpServers": {
    "eenfactuurmaken": {
      "httpUrl": "https://eenfactuurmaken.nl/mcp"
    }
  }
}

Start Gemini CLI. Without headers, Gemini CLI starts the sign-in itself. If it doesn't, type /mcp auth eenfactuurmaken. Your browser opens so you can sign in to EenFactuurMaken.nl.

With an API key

{
  "mcpServers": {
    "eenfactuurmaken": {
      "httpUrl": "https://eenfactuurmaken.nl/mcp",
      "headers": { "Authorization": "Bearer efm_your_key" }
    }
  }
}

Checking

Type /mcp in Gemini CLI. You see eenfactuurmaken with its tools. Then ask, for example: "What's my turnover this quarter and how much VAT do I owe?"