If you've ever written a backtest or a fee-aware order router for Binance or OKX, you've hit this wall: the exchanges publish their fee schedules as HTML tables that change without notice, and there's no clean machine-readable source. So you end up hardcoding 0.0004 somewhere and forgetting about it until your live PnL doesn't match your sim. I got tired of that, so I open-sourced the whole thing. The repo github.com/jack0752168/crypto-exchange-fee-data (MIT) Every VI...