curl --request GET \
  --url https://api.hypereth.io/v2/hyperliquid/getBalance \
  --header 'X-API-KEY: <api-key>'

{
  "balances": [
    {
      "asset": "USDT",
      "walletBalance": "10000.0",
      "availableBalance": "9800.0",
      "crossUnrealizedPnl": "200.0",
      "marginType": "cross"
    }
  ],
  "dataTime": 1710000000000
}