curl --request GET \
  --url https://api.qfex.com/symbols/metrics

{
  "count": 123,
  "data": [
    {
      "current_mark_price": 123,
      "mark_price_change_24h_pct": 123,
      "open_interest": 123,
      "symbol": "<string>",
      "volume_24h_usd_notional": 123
    }
  ],
  "$schema": "<string>"
}