API Reference›WebSocket›Market Streams

Market Streams

Real-time public market data over WebSocket.

Market streams push live data as it happens, so you never poll for prices. Connect to a single stream, or combine many on one connection.

Connecting

text

Single stream:   wss://stream.spacedex.com/ws/<streamName>
Combined stream: wss://stream.spacedex.com/stream?streams=<s1>/<s2>/<s3>

Available streams

Stream	Pushes
<symbol>@ticker	Rolling 24h ticker, once per second
<symbol>@trade	Each executed trade in real time
<symbol>@depth	Order-book changes (diff updates)
<symbol>@kline_<interval>	Candlestick updates for the interval

Stream names use the lowercase symbol. For example, live trades for BTCUSDT:

text

wss://stream.spacedex.com/ws/btcusdt@trade

json

{
  "e": "trade",
  "s": "BTCUSDT",
  "p": "64210.50",
  "q": "0.014",
  "m": false,
  "T": 1717430400500
}

Keeping a depth cache in sync

For a local order book: take a REST depth snapshot, then apply diff updates from the stream whose update id follows the snapshot's lastUpdateId. If you ever see a gap in update ids, discard the book and take a fresh snapshot.

NoteA connection is kept alive by the server with periodic ping frames; reply with a pong. Connections are recycled after 24 hours, so reconnect and resubscribe on close.

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