# Carbon & Cashmere Signal Backtest API – SOL

> Carbon & Cashmere Signal Backtest API – SOL 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 summary for Solana (SOL), including win rate, Sharpe ratio, trade count, and profit factor using the analyst_v3 strategy.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/signal-backtest/SOL
- 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-sol-15d982d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xAOkafcDGWXhz4p1r5Jsr

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-sol-15d982d9
```

Example prompt: Pull the signal backtest results for SOL — I want to see the win rate, Sharpe ratio, and profit factor so I can judge whether the analyst_v3 strategy is worth following.

## When to prefer this

Use this endpoint when you need quantitative backtested performance metrics (win rate, Sharpe ratio, profit factor) for Solana trading signals from the analyst_v3 strategy, especially when evaluating signal reliability before acting on live signals. Prefer it over generic price feeds when the goal is strategy evaluation rather than current price lookup.

## Known failure modes

- Coin not supported — endpoint is hardcoded to SOL, other tickers may return 404 or empty
- Payment not received — x402 payment of 0.1 USDC required per call; missing payment returns 402
- Upstream data unavailable — market data feed outage may cause 503 or stale results
- Invalid backtest window — if a days parameter is out of range, may return an error or fallback default

## How this service works

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

## Output

A JSON object containing the coin ticker (SOL), the backtest window in days, and a summary block with win_rate (percentage), sharpe_ratio, total_trades count, and profit_factor, along with the strategy name (analyst_v3).

## 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-sol-15d982d9/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)