CCXT supports WebSockets (Pro part) for many exchanges.

• User Manual
  • Architecture Overview
  • Prerequisites
  • Streaming Specifics
  • Linking
  • Instantiation
  • Exchange Properties
  • Unified API
    • Public Methods
      • Market Data
        • watchOrderBook (symbol, limit, params)
        • watchOrderBookForSymbols (symbols, limit, params)
        • watchTicker (symbol, params)
        • watchTickers (symbols, params)
        • watchOHLCV (symbol, timeframe, since, limit, params)
        • watchOHLCVForSymbols (symbolsAndTimeframes, since, limit, params)
        • watchTrades (symbol, since, limit, params)
        • watchTradesForSymbols (symbols, since, limit, params)
        • watchBidsAsks (symbols, params)
        • watchLiquidations (symbol, since, limit, params)
        • watchLiquidationsForSymbols (symbols, since, limit, params)
    • Private Methods
      • Authentication
      • Trading
        • watchBalance (params)
        • watchOrders (symbol, since, limit, params)
        • watchOrdersForSymbols (symbols, since, limit, params)
        • watchPosition (symbol, since, limit, params)
        • watchPositions (symbols, since, limit, params)
        • watchMyTrades (symbol, since, limit, params)
        • watchDepositsWithdrawals (code, limit, params)
        • watchMyLiquidations (symbols, since, limit, params)
        • watchMyLiquidationsForSymbols (symbols, since, limit, params)
    • REST alternatives: In addition to above methods, some major exchanges also support websocket methods for REST methods, like createOrderWs (which has same signature as createOrder). You can find them in exchange.has dictionary.
  • UnWatch (for stopping watch methods).
• Error Handling
• Troubleshooting
• How To Submit An Issue
• Usage Examples