Storewide Promotion Code Samples

{
  "name": "10% off storewide except 'Huggies', 'Munchkin', and 'Pampers' brand products",
  "redemption_type": "AUTOMATIC",
  "rules": [
    {
      "action": {
        "cart_items": {
          "discount": {
            "percentage_amount": "10"
          },
          "items": {
            "not": {
              "brands": [
                35,
                36,
                37
              ]
            }
          }
        }
      },
      "apply_once": true
    }
  ]
}