curl --request GET \
  --url https://app.herondata.io/api/end_users/statistics \
  --header 'x-api-key: <api-key>'

{
  "statistics": [
    {
      "currency": "USD",
      "dt": "2025-12-21",
      "heron_id": "mrc_cdcnqTiaBSpD8gGjVJCkXo",
      "label": "Revenue",
      "metrics": {
        "inflow": {
          "amount": 42.42,
          "avg_amount": 1.01,
          "n": 42
        },
        "net": {
          "amount": 42.42,
          "avg_amount": 1.01,
          "n": 42
        },
        "outflow": {
          "amount": 42.42,
          "avg_amount": 1.01,
          "n": 42
        }
      }
    }
  ]
}