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Carbon & Cashmere ETH Volatility API
x402
Carbon & Cashmere ETH Volatility API 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 ETH volatility metrics including realized volatility, range-based estimators, downside risk, and vol-of-vol for use in crypto market intelligence workflows.
Price / call$0.01
Success—
StatusUnknown
How this service works
Professional crypto market intelligence. Real-time prices, signals, and market scoring.
Output
A JSON object with realized volatility at 7d, 30d, and full-period horizons; range-based estimators (Parkinson, Garman-Klass); 30-day downside risk; and vol-of-vol at 30 days — all for ETH, with a disclaimer that data is informational only.
Example use cases
ETH options pricing risk inputs
“I'm pricing some ETH options and need the full volatility picture — can you pull the 7-day and 30-day realized vol, the Garman-Klass and Parkinson estimates, and the vol-of-vol so I can sanity-check my model inputs?”
Portfolio ETH downside risk check
“Before I rebalance my crypto portfolio today, can you check how risky ETH looks right now — specifically the 30-day downside risk and realized volatility so I know if I should reduce my exposure?”
Crypto risk dashboard daily update
“Run my daily ETH risk summary — I need the realized volatility across all horizons, the range-based estimators, and the current vol-of-vol so I can update the dashboard before the market opens.”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/volatility/ETHWhen to prefer
Use this endpoint when you need quantitative ETH volatility estimates across multiple methodologies (realized, range-based, downside) in a single call — especially when building risk dashboards, options pricing tools, or portfolio monitoring workflows that require more than just spot price.
Side effects
- Invalid or unsupported asset symbol returns an error
- Network timeout if upstream price feeds are delayed
- Malformed request returns 4xx with schema validation error
- Missing x402 payment header results in payment-required error
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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