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Carbon & Cashmere Rolling Correlation API – BTC-ETH
x402
Carbon & Cashmere Rolling Correlation API – BTC-ETH is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns the rolling 30-day correlation between BTC and ETH, including percentile rank, trend regime, and statistical summary over a 90-day lookback window.
Price / call$0.05
Success—
StatusUnknown
How this service works
Professional crypto market intelligence. Real-time prices, signals, and market scoring.
Output
Returns a JSON object with the current BTC-ETH Pearson correlation (e.g. 0.82), the correlation regime label (e.g. 'strongly_positive'), trend direction (e.g. 'stable'), percentile rank within the 90-day lookback (e.g. 0.68), mean and standard deviation of correlation over the lookback, and the number of data points used (e.g. 540), along with base/quote coin identifiers and a disclaimer.
Example use cases
Portfolio diversification between BTC and ETH
“I'm holding both Bitcoin and Ethereum — are they moving too closely together right now for any real diversification benefit, and how does today's correlation compare to where it's been over the past 90 days?”
Pair trading signal for crypto desk
“I'm looking to run a BTC-ETH pairs trade — what's the current 30-day correlation, is it trending up or down, and is this level historically unusual enough to be worth acting on?”
Risk-on risk-off regime detection
“Can you tell me what correlation regime BTC and ETH are in right now — are they moving in lockstep like a risk-on environment, or has the relationship broken down into something more neutral or negative?”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/rolling-correlation/BTC-ETHWhen to prefer
Use this endpoint when you need a statistically grounded, regime-labeled rolling correlation between BTC and ETH — especially when you want not just the raw number but its historical percentile context, trend direction, and regime classification (strongly_positive, neutral, etc.). Prefer over generic price APIs when the goal is portfolio diversification analysis, pair trading signals, or risk-on/risk-off regime detection between two major crypto assets.
Side effects
- Invalid or unsupported currency pair returns 404 or empty result
- Missing x402 payment header causes 402 Payment Required response
- Network timeout if upstream price data feed is delayed
- Malformed pair format (e.g. 'BTCETH' instead of 'BTC-ETH') may return 400 or null data
- Insufficient historical data for the requested window returns reduced data_points or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "BTC",
"pair": "BTC-ETH",
"_meta": {
"disclaimer": "Informational research data only — not investment advice."
},
"quote": "ETH",
"trend": "stable",
"regime": "strongly_positive",
"statistics": {
"std_over_lookback": 0.08,
"current_percentile": 0.68,
"mean_over_lookback": 0.78
},
"data_points": 540,
"window_days": 30,
"lookback_days": 90,
"current_correlation": 0.82
}
}Tags
x402
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