curl --request GET \
  --url https://api.example.com/menu-layout/placeholders \
  --header 'X-API-Key: <api-key>'

{
  "items": [
    {
      "placeholder": "<string>",
      "description": "<string>",
      "example": "<string>",
      "category": "<string>"
    }
  ],
  "total": 123
}