# Carbon Cashmere Signal Backtest

> Carbon Cashmere Signal Backtest is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).

Runs historical backtests on 30-90 days of crypto data using analyst_v3 or funding_monitor strategies, returning full trade lists and performance metrics.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/signal-backtest/:var1
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-e481fdd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OwspLOzgUEQhSRTzRVDJf

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-carbon-cashmere-de-e481fdd0
```

Example prompt: Run a 90-day backtest on ETH using the analyst_v3 strategy and tell me the win rate, Sharpe ratio, max drawdown, and whether the results are statistically significant.

## When to prefer this

Use this endpoint when you need to validate a crypto trading strategy's historical performance with statistical rigor — specifically the analyst_v3 multi-factor ML signal or funding_monitor contrarian strategy — across any of 34 supported coins over 30, 60, or 90 day windows, and you want standardized metrics like Sharpe ratio and p-value rather than raw price data.

## Known failure modes

- Unsupported coin ticker returns error — only 34 specific assets supported
- Invalid days value (must be 30, 60, or 90) returns validation error
- Unknown strategy name causes rejection — only analyst_v3, funding_monitor, or all accepted
- Payment required error (x402) if USDC payment not included
- Sparse historical data for low-liquidity coins may produce unreliable metrics

## How this service works

Run strategy backtesting on 30-90 days of historical crypto data — two strategies: analyst_v3 (multi-factor signal fusion) and funding_monitor (contrarian funding rate). Returns full trade list, win rate, Sharpe ratio, max drawdown, profit factor, and p-value for statistical significance. Covers 34 crypto assets. AI agent API for strategy validation, backtesting-as-a-service, and quantitative trading research.

## Output

Returns a full trade list and summary performance metrics including win rate, Sharpe ratio, max drawdown, profit factor, and p-value for the specified coin, strategy, and lookback period.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "coin"
 ],
 "properties": {
  "coin": {
   "type": "string",
   "title": "Coin"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-e481fdd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.carbon-cashmere.de](https://www.zero.xyz/host/api.carbon-cashmere.de/llms.txt)