curl --request GET \
  --url https://external-api.kalshi.com/trade-api/v2/historical/fills \
  --header 'KALSHI-ACCESS-KEY: <api-key>' \
  --header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
  --header 'KALSHI-ACCESS-TIMESTAMP: <api-key>'

{
  "fills": [
    {
      "fill_id": "<string>",
      "trade_id": "<string>",
      "order_id": "<string>",
      "ticker": "<string>",
      "market_ticker": "<string>",
      "count_fp": "10.00",
      "yes_price_dollars": "0.5600",
      "no_price_dollars": "0.5600",
      "is_taker": true,
      "fee_cost": "0.5600",
      "created_time": "2023-11-07T05:31:56Z",
      "subaccount_number": 123,
      "ts": 123
    }
  ],
  "cursor": "<string>"
}