Twelve Data Real-Time Price WebSocket

asyncapi: '2.6.0'
id: 'urn:com:twelvedata:ws:v1:quotes:price'
info:
  title: Twelve Data Real-Time Price WebSocket
  version: '1.0.0'
  description: |
    AsyncAPI 2.6 description of Twelve Data's **real-time price WebSocket**.

    Unlike a one-way HTTP Server-Sent Events stream, this is a genuine,
    bidirectional WebSocket (`wss://`) surface. The client opens a persistent
    connection to `wss://ws.twelvedata.com/v1/quotes/price`, authenticates with
    an `apikey` query parameter, and then sends JSON control messages
    (`subscribe`, `unsubscribe`, `reset`) to manage which instruments it wants.
    The server pushes `price` events as trades occur (average latency ~170 ms),
    plus `subscribe-status` acknowledgements and periodic `heartbeat` events.

    Each successfully subscribed symbol consumes 1 WebSocket credit. WebSocket
    access is metered separately from REST API credits and varies by plan
    (trial credits on Basic/Grow, 1,500 on Pro, 10,000 on Ultra).

    Source: https://twelvedata.com/docs/websocket/ws-real-time-price
  contact:
    name: API Evangelist
    email: kin@apievangelist.com
    url: https://apievangelist.com
  license:
    name: API documentation - Twelve Data Terms of Service
    url: https://twelvedata.com/terms
  x-transport-notes:
    transport: WebSocket
    protocol: wss
    direction: bidirectional
    url: 'wss://ws.twelvedata.com/v1/quotes/price'
    auth: 'apikey query parameter, e.g. ?apikey=YOUR_API_KEY'
    subscribeMessage: '{"action":"subscribe","params":{"symbols":"AAPL,EUR/USD,BTC/USD"}}'
    creditWeight: '1 WebSocket credit per successfully subscribed symbol'
    source: https://twelvedata.com/docs/websocket/ws-real-time-price
defaultContentType: application/json
servers:
  production:
    url: ws.twelvedata.com/v1/quotes/price
    protocol: wss
    description: |
      Twelve Data real-time price WebSocket server. Authenticate by appending
      the `apikey` query parameter to the connection URL:
      `wss://ws.twelvedata.com/v1/quotes/price?apikey=YOUR_API_KEY`.
    security:
      - apikeyQuery: []
channels:
  /v1/quotes/price:
    description: |
      Single multiplexed price channel. The client publishes control messages
      (subscribe / unsubscribe / reset) and the server publishes price events,
      subscription acknowledgements, and heartbeats over the same connection.
    publish:
      operationId: sendControlMessage
      summary: Send a subscription control message to the server.
      description: |
        Client-to-server control messages. `subscribe` adds symbols to the
        stream, `unsubscribe` removes them, and `reset` clears all current
        subscriptions on the connection.
      message:
        oneOf:
          - $ref: '#/components/messages/SubscribeAction'
          - $ref: '#/components/messages/UnsubscribeAction'
          - $ref: '#/components/messages/ResetAction'
    subscribe:
      operationId: receivePriceEvents
      summary: Receive real-time price events and status messages from the server.
      description: |
        Server-to-client messages. After a successful `subscribe`, the server
        emits a `subscribe-status` acknowledgement, then streams `price` events
        as new trades arrive, interleaved with periodic `heartbeat` events.
      message:
        oneOf:
          - $ref: '#/components/messages/PriceEvent'
          - $ref: '#/components/messages/SubscribeStatus'
          - $ref: '#/components/messages/Heartbeat'
components:
  securitySchemes:
    apikeyQuery:
      type: httpApiKey
      in: query
      name: apikey
      description: Twelve Data API key passed as the `apikey` query parameter on the connection URL.
  messages:
    SubscribeAction:
      name: subscribe
      title: Subscribe to symbols
      summary: Add one or more instruments to the price stream.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/SubscribeActionPayload'
      examples:
        - name: subscribeAAPL
          summary: Subscribe to several instruments
          payload:
            action: subscribe
            params:
              symbols: 'AAPL,EUR/USD,BTC/USD'
    UnsubscribeAction:
      name: unsubscribe
      title: Unsubscribe from symbols
      summary: Remove one or more instruments from the price stream.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/SubscribeActionPayload'
      examples:
        - name: unsubscribeAAPL
          summary: Unsubscribe from a single instrument
          payload:
            action: unsubscribe
            params:
              symbols: 'AAPL'
    ResetAction:
      name: reset
      title: Reset subscriptions
      summary: Clear all active subscriptions on the connection.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/ResetActionPayload'
      examples:
        - name: reset
          summary: Reset all subscriptions
          payload:
            action: reset
    PriceEvent:
      name: price
      title: Real-time price event
      summary: A single real-time price update for a subscribed instrument.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PriceEventPayload'
      examples:
        - name: applePrice
          summary: Price tick for AAPL
          payload:
            event: price
            symbol: AAPL
            currency: USD
            exchange: NASDAQ
            type: 'Common Stock'
            timestamp: 1618482192
            price: 134.28
            day_volume: 6323234
    SubscribeStatus:
      name: subscribe-status
      title: Subscription status
      summary: Acknowledgement listing which symbols were successfully subscribed and which failed.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/SubscribeStatusPayload'
      examples:
        - name: statusOk
          summary: Successful subscription acknowledgement
          payload:
            event: subscribe-status
            status: ok
            success:
              - symbol: AAPL
                exchange: NASDAQ
                mic_code: XNGS
                type: 'Common Stock'
            fails: []
    Heartbeat:
      name: heartbeat
      title: Heartbeat
      summary: Periodic keep-alive event confirming the connection is healthy.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/HeartbeatPayload'
      examples:
        - name: heartbeat
          summary: Heartbeat event
          payload:
            event: heartbeat
            status: ok
  schemas:
    SubscribeActionPayload:
      type: object
      required:
        - action
        - params
      properties:
        action:
          type: string
          enum:
            - subscribe
            - unsubscribe
          description: The control action to perform.
        params:
          type: object
          required:
            - symbols
          properties:
            symbols:
              type: string
              description: Comma-separated list of instrument symbols, e.g. 'AAPL,EUR/USD,BTC/USD'.
    ResetActionPayload:
      type: object
      required:
        - action
      properties:
        action:
          type: string
          enum:
            - reset
          description: Clears all active subscriptions on the connection.
    PriceEventPayload:
      type: object
      required:
        - event
        - symbol
        - price
      properties:
        event:
          type: string
          enum:
            - price
          description: Event discriminator, always 'price' for a price tick.
        symbol:
          type: string
          description: Instrument symbol.
        currency:
          type: string
          description: Quote currency.
        exchange:
          type: string
          description: Exchange the instrument trades on.
        mic_code:
          type: string
          description: Market Identifier Code (ISO 10383) of the exchange.
        type:
          type: string
          description: Instrument type, e.g. 'Common Stock', 'Digital Currency', 'Physical Currency'.
        timestamp:
          type: integer
          description: Unix timestamp (seconds) of the price event.
        price:
          type: number
          description: The real-time price.
        day_volume:
          type: integer
          description: Cumulative traded volume for the current day, where available.
    SubscribeStatusPayload:
      type: object
      required:
        - event
        - status
      properties:
        event:
          type: string
          enum:
            - subscribe-status
        status:
          type: string
          enum:
            - ok
            - error
        success:
          type: array
          description: Instruments that were successfully subscribed.
          items:
            type: object
            properties:
              symbol:
                type: string
              exchange:
                type: string
              mic_code:
                type: string
              type:
                type: string
        fails:
          type: array
          description: Symbols that could not be subscribed.
          items:
            type: string
    HeartbeatPayload:
      type: object
      required:
        - event
        - status
      properties:
        event:
          type: string
          enum:
            - heartbeat
        status:
          type: string
          enum:
            - ok