# 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 quantitative backtests on 30-90 days of historical crypto data using analyst_v3 or funding_monitor methodology, returning trade stats, Sharpe ratio, win rate, max drawdown, profit factor, and p-value.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/signal-backtest/:coin
- 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-de22794f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_POl_zRN97-8Hho2bitQap

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-de22794f
```

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

## When to prefer this

Choose this endpoint when you need statistically validated backtest metrics (Sharpe, win rate, drawdown, p-value) for a specific crypto asset using one of two well-defined research methodologies (multi-factor fusion or contrarian funding rate). Prefer it over generic price data endpoints when you need rigorous quantitative performance evaluation rather than raw signals or live prices.

## Known failure modes

- Coin not in the 34 supported assets — returns error or empty result
- Lookback period outside 30-90 day range — rejected or clamped
- Invalid methodology name — returns 400 or unrecognized parameter error
- Payment not processed (x402 protocol failure) — returns 402 Payment Required
- Insufficient historical data for the requested period — partial or error response

## How this service works

Run quantitative research backtests on 30-90 days of historical crypto data — two research methodologies: analyst_v3 (multi-factor data fusion) and funding_monitor (contrarian funding rate analytics). Returns full trade list, win rate, Sharpe ratio, max drawdown, profit factor, and p-value for statistical significance. Covers 34 crypto assets. Quantitative research data for AI agents and analytics — informational purposes only, not investment advice.

## Output

A full backtest report including a trade list, win rate percentage, Sharpe ratio, maximum drawdown, profit factor, and a p-value indicating statistical significance of the signal — covering up to 90 days of historical data for the specified coin.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-de22794f/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)