curl --request GET \
  --url https://external-api.kalshi.com/trade-api/v2/portfolio/orders/{order_id} \
  --header 'KALSHI-ACCESS-KEY: <api-key>' \
  --header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
  --header 'KALSHI-ACCESS-TIMESTAMP: <api-key>'

{
  "order": {
    "order_id": "<string>",
    "user_id": "<string>",
    "client_order_id": "<string>",
    "ticker": "<string>",
    "yes_price_dollars": "0.5600",
    "no_price_dollars": "0.5600",
    "fill_count_fp": "10.00",
    "remaining_count_fp": "10.00",
    "initial_count_fp": "10.00",
    "taker_fill_cost_dollars": "0.5600",
    "maker_fill_cost_dollars": "0.5600",
    "taker_fees_dollars": "0.5600",
    "maker_fees_dollars": "0.5600",
    "expiration_time": "2023-11-07T05:31:56Z",
    "created_time": "2023-11-07T05:31:56Z",
    "last_update_time": "2023-11-07T05:31:56Z",
    "order_group_id": "<string>",
    "cancel_order_on_pause": true,
    "subaccount_number": 123,
    "exchange_index": 0
  }
}