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Carbon & Cashmere Volatility API – BTC
x402
Carbon & Cashmere Volatility API – BTC is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns multi-model Bitcoin volatility metrics including realized volatility across time windows, range-based estimators (Parkinson, Garman-Klass), downside volatility, and volatility-of-volatility.
Price / call$0.01
Success—
StatusUnknown
How this service works
Professional crypto market intelligence. Real-time prices, signals, and market scoring.
Output
Returns a JSON object with Bitcoin's realized volatility over 7d, 30d, and full period; Parkinson and Garman-Klass range-based volatility estimates; 30-day downside volatility; and 30-day volatility-of-volatility, along with an informational disclaimer.
Example use cases
Assess BTC risk before portfolio rebalancing
“Before I rebalance my crypto portfolio, can you pull the latest Bitcoin volatility metrics — including the 30-day realized vol, downside volatility, and Garman-Klass estimate — so I can gauge how risky it is to increase my BTC position right now?”
Monitor Bitcoin volatility regime changes
“I want to know if Bitcoin's volatility has been unusually unstable lately — what's the current volatility-of-volatility, and how does the 7-day realized vol compare to the 30-day figure?”
Size options position using advanced vol estimates
“I'm pricing a Bitcoin options trade and need more than just a simple rolling vol — can you fetch the Parkinson and Garman-Klass range-based volatility estimates alongside the 30-day realized and downside volatility so I can size the position properly?”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/volatility/BTCWhen to prefer
Use this endpoint when you need rigorous, multi-model volatility estimates for Bitcoin specifically — particularly when you need range-based estimators (Parkinson, Garman-Klass) alongside standard realized volatility and downside risk, rather than a single implied or simple rolling volatility figure.
Side effects
- Invalid or unsupported symbol returns an error
- Payment not processed (x402 payment required, insufficient USDC balance)
- Upstream data unavailable leads to stale or missing metrics
- Rate limiting if too many calls in short succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"_meta": {
"disclaimer": "Informational research data only — not investment advice."
},
"symbol": "BTC",
"range_based": {
"parkinson": 0.41,
"garman_klass": 0.4
},
"downside_30d": 0.28,
"realized_vol": {
"7d": 0.32,
"30d": 0.38,
"full_period": 0.42
},
"vol_of_vol_30d": 0.09
}
}Tags
x402
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