I open-sourced every Binance and OKX 2026 fee tier as JSON (+ a calculator)

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