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Carbon & Cashmere Beta-to-BTC Signal API – ETH
x402
Carbon & Cashmere Beta-to-BTC Signal API – ETH 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 the beta coefficient of ETH relative to BTC, including market regime, stability classification, rolling 30-day statistics, R-squared fit, and daily alpha percentage.
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 containing ETH's beta coefficient relative to BTC (e.g. 1.12), the market regime label (e.g. 'amplifier'), stability classification (e.g. 'stable'), R-squared goodness-of-fit, rolling 30-day statistics (mean, std dev, current beta), the lookback period in days, and the daily alpha percentage.
Example use cases
ETH portfolio hedge sizing
“I'm running a BTC-heavy portfolio and want to hedge with ETH positions — can you pull the current beta coefficient and stability classification so I can size the hedge correctly?”
Regime shift detection for ETH
“Has ETH flipped from an amplifier to a dampener regime recently? Show me the current regime label, R-squared fit, and how the 30-day rolling beta has been trending.”
Daily alpha monitoring for ETH
“I track ETH versus BTC every morning — what's the daily alpha percentage right now, is the beta stable or unstable, and where does current beta sit relative to the 30-day mean and standard deviation?”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/beta-to-btc/ETHWhen to prefer
Use this endpoint when you need quantitative beta and regime analytics for ETH relative to BTC — specifically when you want rolling statistics, market regime classification (amplifier/dampener), stability labels, and daily alpha. Prefer this over generic price endpoints when the use case is systematic risk measurement, portfolio hedging analysis, or momentum/mean-reversion regime detection for ETH specifically.
Side effects
- Invalid or unsupported coin symbol returns an error
- Service unavailable if upstream market data feed is down
- Payment failure if USDC balance is insufficient for the $0.01 per-call fee
- Stale data if market data pipeline is delayed
- Malformed request returns 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"beta": 1.12,
"coin": "ETH",
"_meta": {
"disclaimer": "Informational research data only — not investment advice."
},
"regime": "amplifier",
"r_squared": 0.78,
"stability": "stable",
"rolling_30d": {
"std": 0.08,
"mean": 1.11,
"current_beta": 1.15
},
"lookback_days": 90,
"alpha_daily_pct": -0.02
}
}Tags
x402
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