Suki Speech Service Streaming API

asyncapi: '2.6.0'
info:
  title: Suki Speech Service Streaming API
  version: '1.0.0'
  description: >-
    AsyncAPI description for the three WebSocket audio-streaming channels
    exposed by the Suki Speech Service (Suki for Partners). Each REST
    session-create call (Ambient, Dictation, Form Filling) returns an
    `audioWebsocketUrl` over which clinical audio is streamed as
    Base64-encoded PCM inside JSON frames. The same connection delivers
    control events (start/end of stream). Asynchronous results (clinical
    note, transcript, structured form data) are delivered out-of-band via
    REST polling or partner-hosted webhooks documented in the companion
    OpenAPI specifications.

    Sources: in-repo OpenAPI specs (openapi/suki-ambient-api-openapi.yml,
    openapi/suki-dictation-api-openapi.yml,
    openapi/suki-form-filling-api-openapi.yml) and live developer docs at
    https://developer.suki.ai/llms.txt and
    https://developer.suki.ai/documentation/audio-stream.
  contact:
    name: Suki for Partners
    url: https://developer.suki.ai
  license:
    name: Suki Partner Agreement
    url: https://www.suki.ai/

defaultContentType: application/json

servers:
  staging:
    url: sdp.suki-stage.com
    protocol: wss
    description: Suki Speech Service staging WebSocket host
    security:
      - sukiPartnerToken: []

channels:
  /api/v1/ambient/sessions/{sessionId}/audio:
    description: >-
      Ambient session audio channel. Streams microphone audio from the
      provider-patient encounter into Suki for ambient clinical note
      generation. Returned by `POST /ambient/sessions` as
      `audioWebsocketUrl`. Clients first publish a START_TIME control
      frame, then publish AUDIO frames with Base64-encoded PCM in the
      `data` field, and finally publish an AUDIO frame whose `data` is
      `"RU9G"` (Base64 "EOF") to terminate the stream.
    parameters:
      sessionId:
        description: Ambient session UUID returned by the REST create call.
        schema:
          type: string
          format: uuid
    bindings:
      ws:
        bindingVersion: '0.1.0'
        headers:
          type: object
          properties:
            sdp_suki_token:
              type: string
              description: Partner JWT, required for non-browser clients.
            ambient_session_id:
              type: string
              format: uuid
              description: Session UUID, required for non-browser clients.
        query:
          type: object
          description: >-
            Browser clients carry credentials via `Sec-WebSocket-Protocol`
            of the form
            `SukiAmbientAuth,<ambient_session_id>,<sdp_suki_token>`.
    publish:
      operationId: publishAmbientAudio
      summary: Stream encounter audio and control frames to Suki.
      message:
        oneOf:
          - $ref: '#/components/messages/AmbientStartTime'
          - $ref: '#/components/messages/AmbientAudioFrame'
    subscribe:
      operationId: receiveAmbientStatus
      summary: Receive server-side acknowledgements and stream status events.
      message:
        $ref: '#/components/messages/StreamStatusEvent'

  /api/v1/dictation/sessions/{sessionId}/audio:
    description: >-
      Dictation session audio channel. Streams clinician speech to Suki
      and receives partial and final transcriptions in real time.
      Returned by `POST /dictation/sessions` as `audioWebsocketUrl`. The
      socket opens only while the session is in READY or IDLE state.
    parameters:
      sessionId:
        description: Dictation/transcription session UUID.
        schema:
          type: string
          format: uuid
    bindings:
      ws:
        bindingVersion: '0.1.0'
        headers:
          type: object
          properties:
            sdp_suki_token:
              type: string
            transcription_session_id:
              type: string
              format: uuid
        query:
          type: object
          description: >-
            Browser clients carry credentials via `Sec-WebSocket-Protocol`
            of the form
            `SukiAmbientAuth,<sdp_suki_token>,<transcription_session_id>`.
    publish:
      operationId: publishDictationAudio
      summary: Stream PCM_S16LE audio and the AUDIO_END terminator to Suki.
      message:
        oneOf:
          - $ref: '#/components/messages/DictationAudioFrame'
          - $ref: '#/components/messages/DictationAudioEnd'
    subscribe:
      operationId: receiveDictationTranscripts
      summary: Receive partial and final dictation transcripts.
      message:
        $ref: '#/components/messages/TranscriptionStreamResponse'

  /api/v1/form-filling/sessions/{sessionId}/audio:
    description: >-
      Form-filling session audio channel. Streams voice input that Suki
      maps into the structured fields of the form template attached to
      the session. Returned by `POST /form-filling/sessions` as
      `audioWebsocketUrl`. Uses the same Base64 PCM JSON framing as the
      ambient channel.
    parameters:
      sessionId:
        description: Form-filling session UUID.
        schema:
          type: string
          format: uuid
    bindings:
      ws:
        bindingVersion: '0.1.0'
        headers:
          type: object
          properties:
            sdp_suki_token:
              type: string
            ambient_session_id:
              type: string
              format: uuid
    publish:
      operationId: publishFormFillingAudio
      summary: Stream form-filling voice input to Suki.
      message:
        oneOf:
          - $ref: '#/components/messages/AmbientStartTime'
          - $ref: '#/components/messages/AmbientAudioFrame'
    subscribe:
      operationId: receiveFormFillingStatus
      summary: Receive stream-level status frames; structured data is delivered via REST/webhook.
      message:
        $ref: '#/components/messages/StreamStatusEvent'

components:
  securitySchemes:
    sukiPartnerToken:
      type: httpApiKey
      in: header
      name: sdp_suki_token
      description: >-
        Partner JWT issued by the Suki Auth API. Required for non-browser
        WebSocket clients. Browser clients pass credentials through the
        `Sec-WebSocket-Protocol` subprotocol string.

  messages:
    AmbientStartTime:
      name: AmbientStartTime
      title: Start-of-stream control frame
      summary: First frame sent on an ambient or form-filling session.
      contentType: application/json
      payload:
        type: object
        required: [type, startTime]
        properties:
          type:
            type: string
            const: START_TIME
          startTime:
            type: string
            format: date-time
            description: ISO-8601 timestamp marking the start of capture.

    AmbientAudioFrame:
      name: AmbientAudioFrame
      title: Ambient audio frame
      summary: >-
        Base64-encoded PCM audio chunk. To terminate the stream, send a
        frame whose `data` is `RU9G` (Base64 for the ASCII bytes "EOF").
      contentType: application/json
      payload:
        type: object
        required: [type, data]
        properties:
          type:
            type: string
            const: AUDIO
          data:
            type: string
            contentEncoding: base64
            description: PCM audio bytes encoded as Base64. `RU9G` signals EOF.

    DictationAudioFrame:
      name: DictationAudioFrame
      title: Dictation audio frame
      summary: Base64-encoded PCM_S16LE audio chunk.
      contentType: application/json
      payload:
        type: object
        required: [type, audioData]
        properties:
          type:
            type: string
            const: AUDIO
          audioData:
            type: string
            contentEncoding: base64
            description: PCM_S16LE audio bytes encoded as Base64.

    DictationAudioEnd:
      name: DictationAudioEnd
      title: Dictation end-of-stream control frame
      summary: Terminates a dictation audio stream.
      contentType: application/json
      payload:
        type: object
        required: [type, event]
        properties:
          type:
            type: string
            const: EVENT
          event:
            type: string
            const: AUDIO_END

    TranscriptionStreamResponse:
      name: TranscriptionStreamResponse
      title: Dictation transcript event
      summary: Partial or final transcription delivered while audio is streaming.
      contentType: application/json
      payload:
        type: object
        properties:
          type:
            type: string
            enum: [PARTIAL, FINAL, EOF]
          transcript:
            type: string
            description: Transcribed clinician speech.
          isFinal:
            type: boolean
          sessionId:
            type: string
            format: uuid

    StreamStatusEvent:
      name: StreamStatusEvent
      title: Stream status event
      summary: >-
        Server-emitted status updates (e.g. acknowledgements, errors,
        stream lifecycle). Final clinical content for ambient and
        form-filling sessions is fetched via REST or delivered via
        partner-hosted webhooks documented in the companion OpenAPI
        specs.
      contentType: application/json
      payload:
        type: object
        properties:
          type:
            type: string
            enum: [STATUS, ERROR, READY, ENDED]
          message:
            type: string
          sessionId:
            type: string
            format: uuid