curl --request GET \
  --url https://studio-api.onlytraffic.com/api/external/v1/cpl/offers/{id}/volume \
  --header 'X-API-Key: <api-key>'

{
  "success": true,
  "data": {
    "total_fans_30d": 123,
    "avg_per_day": 123,
    "avg_per_order_per_day": 123,
    "daily": {
      "total": [
        {
          "date": "2023-12-25",
          "count": 123
        }
      ],
      "per_order": [
        {
          "date": "2023-12-25",
          "count": 123
        }
      ]
    }
  }
}