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# All instruments
curl "https://api.polynode.dev/v3/perps/statistics?key=$POLYNODE_API_KEY"

# One instrument
curl "https://api.polynode.dev/v3/perps/statistics/sol?key=$POLYNODE_API_KEY"

{
  "instrument_id": 8,
  "symbol": "SOL-USD",
  "volume": "30017339.85",
  "open_price": "142.11",
  "klines": [
    [1783483200000, "142.11", "142.30", "141.86", "141.99", "10233.5", 512]
  ]
}
volume is 24h notional volume in USD. klines are the trailing hourly candles as [open_time, open, high, low, close, volume, trade_count]. For custom intervals and longer ranges use klines; for a volume time series with your own bucketing use volume.