WebSocket (market streams)

Spot: wss://ws.koinbay.com/kline-api/ws

Futures: wss://futuresws.koinbay.com/kline-api/ws.

Transport is binary, gzip-compressed (except ping/pong text frames).

Channel symbol format

• Spot: REST symbol as-is, lowercase — 'btcusdt' -> market_btcusdt_depth_step0.

• Futures: {type}_{pair} — lowercase margin-type prefix + '_' + stripped pair. E-BTC-USDT -> 'e_btcusdt'; S-BTC-USDT -> 's_btcusdt'. So market_e_btcusdt_depth_step0.

Heartbeat

Server sends ping; client must reply pong or be disconnected.

{"ping": 1535975085052}   ->   {"pong": 1535975085052}

Subscribe frame

{
  "event": "sub|unsub|req",
  "params": { "channel": "...", "cb_id": "1" }
}

Channels

Channel	Description	Notes (
market_$symbol_depth_step0	Order book depth	tick has 'asks' and 'buys' (NOT 'bids' like REST). Each level [price, volume] as numbers.
market_$symbol_trade_ticker	Real-time trades	tick.data[] of trades; each has amount, ds (datetime str), price, side, ts, vol.
market_$symbol_kline_<interval>	Kline	Adds amount, ds (datetime str),
market_$symbol_ticker	24h ticker	Spot adds bidPrice/bidVolume/askPrice/askVolume; futures tick is only vol/rose/open/low/high/close/amount (no bid/ask).
mark_price_$symbol	Futures mark price + funding	Futures-only; NOT 'market_' prefixed. All values strings. Has nextSettlementTime (REST /index does not).