curl --request GET \
  --url https://api.elastic-cloud.com/api/v1/billing/costs/{organization_id} \
  --header 'Authorization: <api-key>'

{
  "balance": {
    "available": "<double>",
    "line_items": [
      {
        "ecu_balance": "<double>",
        "ecu_quantity": "<double>",
        "end": "<dateTime>",
        "id": "<string>",
        "start": "<dateTime>"
      },
      {
        "ecu_balance": "<double>",
        "ecu_quantity": "<double>",
        "end": "<dateTime>",
        "id": "<string>",
        "start": "<dateTime>"
      }
    ],
    "remaining": "<double>"
  },
  "costs": {
    "dimensions": [
      {
        "cost": "<double>",
        "type": "data_out"
      },
      {
        "cost": "<double>",
        "type": "data_out"
      }
    ],
    "total": "<double>"
  },
  "hourly_rate": "<double>",
  "trials": "<double>"
}