# Services from grok-backtest-api.fly.dev on Zero

> grok-backtest-api.fly.dev serves 5 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/grok-backtest-api.fly.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/grok-backtest-api.fly.dev/health.json

## Services

- [Crypto Backtest](https://www.zero.xyz/c/crypto-backtest-8a293f51/llms.txt): $0.05/call via x402. 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.
- [Point-in-time Universe](https://www.zero.xyz/c/point-in-time-universe-18345963/llms.txt): $0.05/call via x402. Returns a survivorship-bias-free ranked list of the top-N crypto coins by dollar volume for a given date, suitable for building backtests and live trading universes.
- [Strategy Optimizer](https://www.zero.xyz/c/strategy-optimizer-7bd60268/llms.txt): $0.5/call via x402. Grid-searches strategy parameter combinations across Coinbase daily candles and returns recommended, overfitting-flagged, and ranked parameter sets for crypto quant strategies.
- [Token Risk Check](https://www.zero.xyz/c/token-risk-check-2de83475/llms.txt): $0.02/call via x402. Checks a token contract address on Base, Ethereum, or Solana for risk factors including proxy structure, taxes, upgrade risk, and overall safety verdict.
- [Crypto Market Signals](https://www.zero.xyz/c/crypto-market-signals-0ae8317a/llms.txt): $0.01/call via x402. Returns daily crypto market regime, BTC/ETH moving-average signals, breadth stats, and R1 breakout signals for a point-in-time top-N universe

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)