curl --request GET \
  --url https://{cluster}.voucherify.io/management/v1/projects/{projectId}/stacking-rules \
  --header 'X-Management-Id: <api-key>' \
  --header 'X-Management-Token: <api-key>'

{
  "object": "list",
  "data_ref": "data",
  "data": [
    {
      "id": "stk_0e9bdfd48108548fd3",
      "exclusive_categories": [
        "cat_0f2ba1284b565c235c",
        "cat_0d75bdfe4c9030a732"
      ],
      "joint_categories": [
        "cat_0d74559c3e9030da13",
        "cat_0d507a4d6e8a1b7b97"
      ],
      "redeemables_limit": 25,
      "applicable_redeemables_limit": 10,
      "applicable_redeemables_per_category_limit": 2,
      "applicable_redeemables_category_limits": {
        "cat_0d75bdfe4c9030a732": 1,
        "cat_0d7c4d183011d043cc": 2
      },
      "applicable_exclusive_redeemables_limit": 2,
      "applicable_exclusive_redeemables_per_category_limit": 2,
      "discount_calculation_mode": "DISCOUNTED_AMOUNT",
      "initial_amount_mode_categories": [
        "cat_0d507a4d6e8a1b7b97"
      ],
      "discounted_amount_mode_categories": [
        "cat_0d7455f93c1030da4a"
      ],
      "redeemables_application_mode": "PARTIAL",
      "redeemables_sorting_rule": "CATEGORY_HIERARCHY",
      "redeemables_no_effect_rule": "REDEEM_ANYWAY",
      "no_effect_skip_categories": [],
      "no_effect_redeem_anyway_categories": [],
      "redeemables_products_application_mode": "ONCE",
      "redeemables_rollback_order_mode": "WITH_ORDER",
      "grouped_redeemables_sorting_rule": "JOINT_ALWAYS_LAST",
      "created_at": "2024-04-16T20:18:38.213Z",
      "updated_at": "2025-08-28T08:28:53.038Z"
    }
  ],
  "total": 1
}

{
  "code": 401,
  "message": "Unauthorized",
  "key": "unauthorized"
}

{
  "code": 402,
  "message": "Payment required",
  "details": "Your current plan does not include a feature required to perform this operation.",
  "key": "missing_required_feature"
}

{
  "code": 404,
  "message": "Resource not found",
  "details": "Cannot find project with id proj_5itvDU7"
}