curl --request GET \
  --url https://api.cloud.flexprice.io/v1/cost/breakdown/{subscription_id} \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "cost": 123,
      "meter_id": "<string>",
      "meter_name": "<string>",
      "usage": 123
    }
  ],
  "total_cost": 123
}