AsyncAPI channel · Capital.com Public API · Capital.com WebSocket Streaming API

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Single WebSocket channel for all destinations. Clients send frames whose `destination` field selects an operation (marketData.subscribe, marketData.unsubscribe, OHLCMarketData.subscribe, OHLCMarketData.unsubscribe, ping). The server publishes subscription confirmations, market data updates, OHLC bar updates, and ping responses on the same connection.

Open source AsyncAPI → All Capital.com Public API channels Capital.com Public API provider profile
Provider: Capital.com Public API AsyncAPI: v2.6.0 Spec: Capital.com WebSocket Streaming API Operations: 2 Messages: 9

Channel address

/

Operations

publish
sendClientFrame
Frames sent from the client to Capital.com.
receiveServerFrame
Frames received from Capital.com.

Messages

marketDataSubscribe
Subscribe to live bid/offer price updates for a set of instrument epics.
Content-Type:
marketDataUnsubscribe
Remove real-time price subscriptions for one or more epics.
Content-Type:
ohlcMarketDataSubscribe
Subscribe to OHLC candle updates for a set of epics, resolutions, and bar type.
Content-Type:
ohlcMarketDataUnsubscribe
Remove OHLC subscriptions for the given epics, with optional resolution and type filters.
Content-Type:
ping
Keep the WebSocket session alive (must be sent at least every 10 minutes).
Content-Type:
subscriptionStatus
Confirms processing status of a subscribe or unsubscribe request per epic.
Content-Type:
marketDataUpdate
Streaming bid/offer quote update for a subscribed instrument.
Content-Type:
ohlcMarketDataUpdate
Streaming OHLC bar update for a subscribed instrument and resolution.
Content-Type:
pingResponse
Server acknowledgement of a client ping.
Content-Type:

About AsyncAPI

The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.

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