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Crypto Backtest
x402
Crypto Backtest is a paid API for AI agents from grok-backtest-api.fly.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-31).
Runs a historical backtest of a crypto trading strategy (breakout, momentum, or dip-buying) on Coinbase daily candles with survivorship-bias-free universe construction, returning PnL metrics and trade statistics.
Price / call$0.05
Success—
StatusUnknown
How this service works
Backtest any crypto strategy on 399 Coinbase coins, bias-free. Breakout, momentum, dip-buy or MA trend rules on Coinbase daily data with fees, slippage, H1/H2 split, luck flag and survivorship-bias-free universe.
Output
A JSON object containing total return percentage, final portfolio value, win rate, number of closed trades, maximum drawdown percentage, total fees paid, and a luck flag indicating whether the strategy's performance may be attributable to chance rather than edge.
Example use cases
Momentum strategy historical performance check
“Backtest a momentum strategy on crypto daily candles from Jan 2021 to Dec 2023, holding the top 3 tokens by 30-day momentum, rebalancing every 5 days, with a BTC MA50 gate and 0.15% slippage.”
Breakout strategy with ATR-based stops
“Can you backtest a breakout strategy from March 2022 through March 2024 with a 20-day lookback, ATR multiplier of 2.5, max 5 open positions, 2% risk per trade, and breadth50 market gate? Use 0.1% fees and 0.1% slippage.”
Dip-buying strategy stress test during bear market
“Run a dip-buy backtest from November 2021 to December 2022 — buy tokens that drop more than 15% in 3 days, hold up to 30 days or until a 20% hard stop, using a MA50 trend filter. Set slippage to 0.2% and fees to 0.05%.”
Technical details
Endpoint
POSThttps://grok-backtest-api.fly.dev/backtest?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to historically validate a crypto trading strategy (breakout, momentum, or dip-buying) on Coinbase daily candles with a survivorship-bias-free universe. Prefer it over generic backtesting tools when you need point-in-time universe construction that avoids lookahead bias, and when pay-per-call economics (no subscription) are preferred. Use it before deploying any systematic crypto strategy to quantify expected drawdown, win rate, and return.
Side effects
- Invalid strategy type returns a validation error
- Date range with insufficient historical data may produce unreliable or empty results
- Slippage or fee values outside allowed range (0–0.05) are rejected
- Strategy parameters outside allowed bounds (e.g. lookback > 60) fail validation
- Payment not settled via x402 results in 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| end | — | |
| fee | number | |
| start | — | |
| slippage | number | |
| strategy | — | |
| universe | object | |
| include_trades | boolean | |
| initial_capital | number |
Output
Schema · Response
{
"type": "json",
"example": {
"win_rate": 0.308,
"fees_paid": 22.08,
"luck_flag": true,
"return_pct": 10.98,
"final_value": 166.47,
"closed_trades": 26,
"max_drawdown_pct": -23.77
}
}Tags
x402
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