Bitget kline

messageklineBitget WebSocket APIWebSocketPublic channels

Candlesticks for one symbol at one interval. Bitget says data is pushed once a second while there are trades, and once per interval when there are none.

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

Independent and unofficialbitget.comchecked 12 Oct 2026

This is a subscription of the Bitget WebSocket API, not an HTTP endpoint. It has no method and no path: it is sent as JSON over an open WebSocket connection.

The message

Name: kline
Direction: Subscription, opened by the client and then fed by the server
Subscribed to as: kline
Carried by: WebSocket. This channel is in the public section of Bitget's WebSocket documentation. The addresses are the ones on Bitget's quick start page (bitget.com/docs/uta/quick-start), opened the same day, which also lists VIP and low latency hosts.
Public channel: wss://ws.bitget.com/v3/ws/public
Public channel, demo trading: wss://wspap.bitget.com/v3/ws/public

Fields

Name	Type	Description
oprequired	String	subscribe to start the channel, unsubscribe to stop it.
argsrequired	List<Object>	The channels to act on. Each entry names one.
args[].instTyperequired	String	The product type: spot, usdt-futures, coin-futures or usdc-futures.
args[].topicrequired	String	Always kline.
args[].symbolrequired	String	The symbol, for example BTCUSDT.
args[].intervalrequired	String	The width of the candle: 1m, 3m, 5m, 15m, 30m, 1H, 4H, 6H, 12H or 1D.

What arrives

kline: A message with the event subscribe and the same arg confirms the subscription, with a connId for the connection. On an error the event is error, with a code and a msg. Data then arrives as below.

The vendor's page does not say which of these fields are required or always present.

Name	Type	Description
arg	Object	The channel the data belongs to: the instType, the topic and, on a public channel, the symbol that were subscribed to.
action	String	snapshot for full data, update for incremental data.
data	List<Object>	The candles.
data[].start	String	The start of the candle, as Unix time in milliseconds.
data[].open	String	The opening price.
data[].close	String	The closing price.
data[].high	String	The highest price.
data[].low	String	The lowest price.
data[].volume	String	The volume traded, in the base coin.
data[].turnover	String	The turnover, in the quote coin.

Sample

Written by this site from the fields recorded on this page. It has not been run against a terminal, a server or an account, and the values in it are placeholders. No credential is typed into it: where a field holds one, the placeholder says where it comes from. Nothing is entered on this site.

{
  "op": "subscribe",
  "args": [
    {
      "instType": "spot",
      "topic": "kline",
      "symbol": "BTCUSDT",
      "interval": "1D"
    }
  ]
}

Limits that apply at Bitget

Limit	Value	Scope	Source
Public market data, legacy v1 API	20 per 2 s per IP, public market data	Per IP address, public market data endpoints of the legacy v1 API	bitgetlimited.github.iochecked 12 Oct 2026
Overall requests a minute	6,000	Per IP address, all requests to the common domain name, with REST and WebSocket sharing one allowance	bitget.comchecked 12 Oct 2026
Concurrent WebSocket connections	100	Per IP address	bitget.comchecked 12 Oct 2026
WebSocket messages a second	10	Per WebSocket connection, counting ping, login, subscribe and unsubscribe messages	bitget.comchecked 12 Oct 2026
WebSocket subscription requests an hour	240	Per WebSocket connection	bitget.comchecked 12 Oct 2026
Concurrent WebSocket channel subscriptions	1,000	Per WebSocket connection	bitget.comchecked 12 Oct 2026