# Carbon & Cashmere Signal Backtest API – ETH

> Carbon & Cashmere Signal Backtest API – ETH is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Returns a backtested trading signal performance summary for ETH, including win rate, Sharpe ratio, profit factor, and trade count over a specified lookback period.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/signal-backtest/ETH
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-signal-backtest-api-eth-293d820c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EzDb-igYD1Gd1NWKvKtTp

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 carbon-cashmere-signal-backtest-api-eth-293d820c
```

Example prompt: Pull the Carbon & Cashmere signal backtest results for ETH so I can see the win rate, Sharpe ratio, and profit factor for the analyst_v3 strategy over the last 30 days.

## When to prefer this

Use this endpoint when you need quantitative backtested performance metrics (win rate, Sharpe ratio, profit factor) for ETH trading signals from the Carbon & Cashmere analyst_v3 strategy, rather than raw price feeds or real-time signal triggers. Prefer this over generic price APIs when the goal is to evaluate signal quality or strategy viability.

## Known failure modes

- Unsupported coin symbol returns 404 or empty result
- Payment failure (insufficient USDC balance) returns 402 via x402 protocol
- Network timeout if upstream market data is unavailable
- Rate limiting if too many concurrent requests are made
- Stale or missing backtest data if insufficient historical data exists for the coin

## How this service works

Professional crypto market intelligence. Real-time prices, signals, and market scoring.

## Output

A JSON object containing the coin symbol (ETH), the lookback period in days, the strategy name (analyst_v3), and a summary with win_rate (%), Sharpe ratio, total number of trades, and profit factor — quantifying historical signal performance.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "days": 30,
  "summary": {
   "win_rate": 64.3,
   "sharpe_ratio": 1.35,
   "total_trades": 28,
   "profit_factor": 1.82
  },
  "strategy": "analyst_v3"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-signal-backtest-api-eth-293d820c/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)