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1# binance-ws23Binance spot combined stream `wss://stream.binance.com:9443/stream?streams=btcusdt@miniTicker/…`.45- **Type**: WEBSOCKET · **Rights**: PUBLIC_ATTRIBUTED · **Real-time**: REALTIME (event time `E`, exchange-generated)6- **Pairs**: USDT-quoted majors → distinct instruments from USD pairs (`crypto_btc_usdt` vs `crypto_btc_usd`).7- **Cadence**: one miniTicker per symbol per second (fixed, not per trade).8- **Heartbeat**: server-initiated pings; no client ping needed.9