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

[
  {
    "avg_amount": {
      "amount": "1234.56",
      "currency": "USD"
    },
    "avg_confidence": 123,
    "counterparty": "<string>",
    "frequency": "not_enough_data",
    "merchant_name": "<string>",
    "transactions": [
      {
        "amount": {
          "amount": "1234.56",
          "currency": "USD"
        },
        "category_confidence": 123,
        "category_heron_id": "<string>",
        "category_label": "<string>",
        "counterparty": "<string>",
        "description": "<string>",
        "heron_id": "<string>",
        "merchant_heron_id": "<string>",
        "merchant_name": "<string>",
        "timestamp": "2023-11-07T05:31:56Z"
      }
    ]
  }
]