curl --request GET \
  --url https://{cluster}.voucherify.io/v1/campaigns/{campaignId}/summary \
  --header 'Authorization: Bearer <token>' \
  --header 'X-App-Id: <api-key>' \
  --header 'X-App-Token: <api-key>'

{
  "object": "campaign_summary",
  "campaign": {
    "id": "camp_WaZ6r4LSF1alRaIwJVKS07bs",
    "name": "Summer-2025",
    "campaign_type": "DISCOUNT_COUPONS",
    "type": "STANDALONE",
    "voucher": {
      "type": "DISCOUNT_VOUCHER",
      "discount": {
        "type": "AMOUNT",
        "amount_off": 2000,
        "effect": "APPLY_TO_ORDER"
      },
      "redemption": {
        "quantity": null
      },
      "is_referral_code": false
    },
    "auto_join": false,
    "join_once": false,
    "use_voucher_metadata_schema": true,
    "vouchers_count": 1,
    "active": true,
    "metadata": {},
    "created_at": "2025-06-17T08:05:57.720Z",
    "creation_status": "DONE",
    "vouchers_generation_status": "DONE",
    "protected": false,
    "category_id": null,
    "categories": [],
    "object": "campaign"
  },
  "redemptions": 10,
  "redemptions_succeeded": 8,
  "redemptions_failed": 2,
  "rollbacks": 1,
  "rollbacks_succeeded": 1,
  "rollbacks_failed": 0,
  "validations": 10,
  "validations_succeeded": 8,
  "validations_failed": 2,
  "vouchers_created": 1,
  "vouchers_deleted": 0,
  "publications": 0,
  "publications_succeeded": 0,
  "publications_failed": 0,
  "discounted_amount": 20000,
  "rolledback_discounted_amount": 200,
  "orders_amount": 19453,
  "orders_rolledback_amount": 800
}