# binance-ws

Binance spot combined stream wss://stream.binance.com:9443/stream?streams=btcusdt@miniTicker/….

• Type: WEBSOCKET · Rights: PUBLIC_ATTRIBUTED · Real-time: REALTIME (event time E, exchange-generated)
• Pairs: USDT-quoted majors → distinct instruments from USD pairs (crypto_btc_usdt vs crypto_btc_usd).
• Cadence: one miniTicker per symbol per second (fixed, not per trade).
• Heartbeat: server-initiated pings; no client ping needed.