Realized volatility for 16 crypto assets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/T

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          "asset": "BTC-USD",
          "disclaimer": "Realized volatility from Binance daily OHLC. Historical; not a forecast. Not financial advice.",
          "note": "All estimates are annualized realized volatility using closed daily candles. Annualized by sqrt(252) trading-day convention.",
          "percentile_context": [
            {
              "current_vol": 0.48,
              "estimator": "parkinson",
              "is_window_high": false,
              "is_window_low": false,
              "max": 1.05,
              "min": 0.22,
              "percentile": 0.72,
              "sample_count": 87,
              "vol_window": "7d"
            },
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              "current_vol": 0.58,
              "estimator": "parkinson",
              "is_window_high": true,
              "is_window_low": false,
              "max": 0.98,
              "min": 0.28,
              "percentile": 0.81,
              "sample_count": 87,
              "vol_window": "30d"
            }
          ],
          "source": "Binance daily klines (closed candles only)",
          "symbol": "BTCUSDT",
          "term_structure": [
            {
              "best_estimator": "parkinson",
              "close_to_close": 0.54,
              "garman_klass": 0.51,
              "n_candles": 7,
              "note": "annualized realized volatility",
              "parkinson": 0.48,
              "percentile": 0.72,
              "vol_regime": "elevated",
              "window": "7d"
            },
            {
              "best_estimator": "garman_klass",
              "close_to_close": 0.62,
              "garman_klass": 0.61,
              "n_candles": 30,
              "note": "annualized realized volatility",
              "parkinson": 0.58,
              "percentile": 0.81,
              "vol_regime": "elevated",
              "window": "30d"
            }
          ],
          "vol_30d_annualized": 0.62,
          "vol_7d_annualized": 0.54
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curl "https://kronossignals.com/api/v1/volatility/btc"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://kronossignals.com/api/v1/volatility/btc");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://kronossignals.com/api/v1/volatility/btc")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header