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Twelve Data

Twelve Data WebSocket Streaming API

Real-time price streaming over a persistent, bidirectional WebSocket at wss://ws.twelvedata.com/v1/quotes/price. Clients authenticate with an apikey query parameter, send JSON subscribe / unsubscribe / reset control messages, and receive pushed price events (roughly 170ms average latency), subscribe-status acknowledgements, and heartbeats.

Documentation Provider Profile APIs.io AsyncAPI GitHub

Twelve Data WebSocket Streaming API is one of 15 APIs that Twelve Data publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include Real-Time Data, WebSocket, Streaming, and Market Data. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

This event API exposes 2 operations across 1 channel, and defines 11 schemas. It is described by AsyncAPI 2.6.0, at version 1.0.0.

The API connects through a single server, ws.twelvedata.com/v1/quotes/price (wss).

2 operations 1 channels 11 schemas

Metadata

The identity and technical contract details declared by the specification.

Specification
AsyncAPI 2.6.0
API Version
1.0.0
Base URL
wss://ws.twelvedata.com/v1/quotes/price
Contact
API Evangelist
License
API documentation - Twelve Data Terms of Service
Resource Areas
1

Channels & Operations 2

Across 1 channel, the API surfaces 2 operations. Each is listed below with its action, channel, parameters, and response codes.

Channels 2
SUB
/v1/quotes/price
Receive real-time price events and status messages from the server.
receivePriceEvents body
PUB
/v1/quotes/price
Send a subscription control message to the server.
sendControlMessage body

Messages & Schemas 11

The contract defines 11 schemas that model the data carried by its messages. The most detailed are PriceEventPayload (9 properties), SubscribeStatusPayload (4 properties), HeartbeatPayload (2 properties), SubscribeActionPayload (2 properties). Each schema is shown below with its type and property counts.

SubscribeAction
message
Add one or more instruments to the price stream.
UnsubscribeAction
message
Remove one or more instruments from the price stream.
ResetAction
message
Clear all active subscriptions on the connection.
PriceEvent
message
A single real-time price update for a subscribed instrument.
SubscribeStatus
message
Acknowledgement listing which symbols were successfully subscribed and which failed.
Heartbeat
message
Periodic keep-alive event confirming the connection is healthy.
SubscribeActionPayload
object
2 properties 2 required
ResetActionPayload
object
1 property 1 required
PriceEventPayload
object
9 properties 3 required
SubscribeStatusPayload
object
4 properties 2 required
HeartbeatPayload
object
2 properties 2 required

Specification

The full machine-readable AsyncAPI contract behind this narrative.

Source

twelvedata-asyncapi.yml Raw ↑

Other APIs Twelve Data publishes across the network.

Twelve Data Core Data API
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Twelve Data Reference Data API
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Twelve Data Technical Indicators API
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Twelve Data Time Series API
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Twelve Data Advanced API
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Twelve Data Analysis API
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Twelve Data Currencies API
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Twelve Data Etfs API
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Twelve Data Market Data API
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Twelve Data Money Market Funds API
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Twelve Data Mutual Funds API
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#Real-Time Data#WebSocket#Streaming#Market Data
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API Details
ID
twelvedata:twelvedata-websocket-streaming-api
Base URL
wss://ws.twelvedata.com/v1/quotes/price
Docs
https://twelvedata.com/docs/websocket/ws-real-time-price
Provider
Twelve Data
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