Binance public market data relay (read-only, no key, no account data).
Usage:
/klines?symbol=SOLUSDT&interval=15m&limit=96
/price?symbol=SOLUSDT
symbol: any Binance spot pair (BTCUSDT, ETHUSDT, SOLUSDT, BNBUSDT, ...)
interval: 15m / 1h / 4h / 1d ... ; limit: 1-1000; add &format=json for JSON
Kline rows: [open_time_utc, open, high, low, close, volume, close_time_utc]