SLNG · AsyncAPI Specification

SLNG Gateway API - SLNG STT

Version 0.1.0

SLNG Gateway API

View Spec View on GitHub CompanySpeechVoiceSpeech-to-TextText-to-SpeechVoice AIVoice AgentsTranscriptionSpeech RecognitionArtificial IntelligenceAPI GatewayReal-TimeAsyncAPIEventsWebSockets

Channels

/v1/stt/slng/openai/whisper:large-v3
Stream real-time transcripts from OpenAI Whisper Large v3 over WebSocket with VAD, partial results, and automatic language detection across 99 languages.
/v1/stt/slng/deepgram/nova:3-en
Stream real-time English transcripts from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partials, finals, and speaker diarization.
/v1/stt/slng/deepgram/nova:3-te
Stream real-time Telugu speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-mr
Stream real-time Marathi speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-kn
Stream real-time Kannada speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-es
Stream real-time Spanish speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-in
Stream real-time Indonesian speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-hi
Stream real-time Hindi speech-to-text from SLNG-hosted Deepgram Nova 3 over WebSocket with low-latency partial and final transcripts and VAD.
/v1/stt/slng/deepgram/nova:3-multi
Stream real-time multilingual transcripts from SLNG-hosted Deepgram Nova 3 over WebSocket with automatic language detection across supported languages.

Messages

✉
DeepgramSttResultsMulti
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
SlngDeepgramNova3MultiSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 multi-language STT session.
✉
DeepgramSttResultsIn
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
SlngDeepgramNova3InSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Indonesian STT session.
✉
DeepgramSttResultsHi
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
SlngDeepgramNova3HiSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Hindi STT session.
✉
DeepgramSttResultsEs
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
SlngDeepgramNova3EsSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Spanish STT session.
✉
DeepgramSttError
Error
Error from the Deepgram backend or gateway.
✉
DeepgramSttResultsEn
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
DeepgramSttResultsTe
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
DeepgramSttResultsTa
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
DeepgramSttResultsMr
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
DeepgramSttResultsKn
Results
Deepgram transcription result — partial or final, determined by is_final.
✉
DeepgramSttMetadata
Metadata
Deepgram session metadata. Sent when the backend connects and again after the session ends with final statistics. This is informational — do not wait for it before streaming audio.
✉
KeepaliveMessage
Keepalive Message
Keep the WebSocket connection alive during silence.
✉
DeepgramSttBinaryAudio
Binary Audio Frame
Stream raw binary PCM audio frames to be transcribed. Sent as binary WebSocket frames (NOT JSON). Recommended chunk size is 8192 bytes (~256ms at 16kHz linear16). Start streaming immediately after the init message — do not wait for the Metadata response.
✉
SlngDeepgramNova3EnSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 English STT session.
✉
SlngDeepgramNova3TeSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Telugu STT session.
✉
SlngDeepgramNova3TaSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Tamil STT session.
✉
SlngDeepgramNova3MrSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Marathi STT session.
✉
SlngDeepgramNova3KnSttInitRequest
Init Request
Initialize an SLNG-hosted Deepgram Nova 3 Kannada STT session.
✉
SttErrorResponse
Error Response
Indicates an error occurred during recognition.
✉
SlngWhisperSttFinalTranscript
Final Transcript
Final Whisper transcription result with segment-level detail.
✉
SlngWhisperSttPartialTranscript
Partial Transcript
Interim Whisper transcription result, updated as more audio is processed.
✉
SlngWhisperSttReadyResponse
Ready Response
Indicates the Whisper session is ready to receive audio.
✉
SttCloseMessage
Close Message
Signal end of audio stream and close the connection.
✉
SttFinalizeMessage
Finalize Message
Force-finalize buffered audio tokens without closing the connection.
✉
SttAudioMessage
Audio Message
Stream an audio frame to be transcribed.
✉
SlngWhisperLargeV3SttInitRequest
Init Request
Initialize an SLNG-hosted Whisper Large v3 STT session.

Servers

wss
production
Production
wss
staging
Staging

AsyncAPI Specification

Raw ↑ 
asyncapi: 3.0.0
info:
  title: SLNG Gateway API - SLNG STT
  version: 0.1.0
  description: SLNG Gateway API
  contact:
    name: SLNG Support
    url: https://slng.ai
    email: support@slng.ai
  license:
    name: Proprietary
  tags:
    - name: STT
      description: Speech-to-Text services
    - name: Unmute STT Bridge
      description: SLNG native WebSocket STT protocol bridge.
    - name: Unmute TTS Bridge
      description: SLNG native WebSocket TTS protocol bridge.
servers:
  production:
    host: api.slng.ai
    protocol: wss
    description: Production
    security:
      - $ref: '#/components/securitySchemes/bearer'
  staging:
    host: stageapi.slng.ai
    protocol: wss
    description: Staging
    security:
      - $ref: '#/components/securitySchemes/bearer'
channels:
  /v1/stt/slng/openai/whisper:large-v3:
    address: /v1/stt/slng/openai/whisper:large-v3
    title: Whisper Large v3
    summary: Whisper Large v3
    description: >-
      Stream real-time transcripts from OpenAI Whisper Large v3 over WebSocket
      with VAD, partial results, and automatic language detection across 99
      languages.
    tags:
      - name: Whisper Large v3
    servers:
      - $ref: '#/servers/production'
      - $ref: '#/servers/staging'
    messages:
      SlngWhisperLargeV3SttInitRequest:
        $ref: '#/components/messages/SlngWhisperLargeV3SttInitRequest'
      SttAudioMessage:
        $ref: '#/components/messages/SttAudioMessage'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      SlngWhisperSttReadyResponse:
        $ref: '#/components/messages/SlngWhisperSttReadyResponse'
      SlngWhisperSttPartialTranscript:
        $ref: '#/components/messages/SlngWhisperSttPartialTranscript'
      SlngWhisperSttFinalTranscript:
        $ref: '#/components/messages/SlngWhisperSttFinalTranscript'
      SttErrorResponse:
        $ref: '#/components/messages/SttErrorResponse'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngWhisper'
  /v1/stt/slng/deepgram/nova:3-en:
    address: /v1/stt/slng/deepgram/nova:3-en
    title: Nova 3 (English)
    summary: Nova 3 (English)
    description: >-
      Stream real-time English transcripts from SLNG-hosted Deepgram Nova 3 over
      WebSocket with low-latency partials, finals, and speaker diarization.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3EnSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3EnSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsEn:
        $ref: '#/components/messages/DeepgramSttResultsEn'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaEn'
  /v1/stt/slng/deepgram/nova:3-te:
    address: /v1/stt/slng/deepgram/nova:3-te
    title: Nova 3 (Telugu)
    summary: Nova 3 (Telugu)
    description: >-
      Stream real-time Telugu speech-to-text from SLNG-hosted Deepgram Nova 3
      over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3TeSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3TeSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsTe:
        $ref: '#/components/messages/DeepgramSttResultsTe'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaTe'
  /v1/stt/slng/deepgram/nova:3-mr:
    address: /v1/stt/slng/deepgram/nova:3-mr
    title: Nova 3 (Marathi)
    summary: Nova 3 (Marathi)
    description: >-
      Stream real-time Marathi speech-to-text from SLNG-hosted Deepgram Nova 3
      over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3MrSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3MrSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsMr:
        $ref: '#/components/messages/DeepgramSttResultsMr'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaMr'
  /v1/stt/slng/deepgram/nova:3-kn:
    address: /v1/stt/slng/deepgram/nova:3-kn
    title: Nova 3 (Kannada)
    summary: Nova 3 (Kannada)
    description: >-
      Stream real-time Kannada speech-to-text from SLNG-hosted Deepgram Nova 3
      over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3KnSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3KnSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsKn:
        $ref: '#/components/messages/DeepgramSttResultsKn'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaKn'
  /v1/stt/slng/deepgram/nova:3-es:
    address: /v1/stt/slng/deepgram/nova:3-es
    title: Nova 3 (Spanish)
    summary: Nova 3 (Spanish)
    description: >-
      Stream real-time Spanish speech-to-text from SLNG-hosted Deepgram Nova 3
      over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3EsSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3EsSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsEs:
        $ref: '#/components/messages/DeepgramSttResultsEs'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaEs'
  /v1/stt/slng/deepgram/nova:3-in:
    address: /v1/stt/slng/deepgram/nova:3-in
    title: Nova 3 (Indonesian)
    summary: Nova 3 (Indonesian)
    description: >-
      Stream real-time Indonesian speech-to-text from SLNG-hosted Deepgram Nova
      3 over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3InSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3InSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsIn:
        $ref: '#/components/messages/DeepgramSttResultsIn'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaIn'
  /v1/stt/slng/deepgram/nova:3-hi:
    address: /v1/stt/slng/deepgram/nova:3-hi
    title: Nova 3 (Hindi)
    summary: Nova 3 (Hindi)
    description: >-
      Stream real-time Hindi speech-to-text from SLNG-hosted Deepgram Nova 3
      over WebSocket with low-latency partial and final transcripts and VAD.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3HiSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3HiSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsHi:
        $ref: '#/components/messages/DeepgramSttResultsHi'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaHi'
  /v1/stt/slng/deepgram/nova:3-multi:
    address: /v1/stt/slng/deepgram/nova:3-multi
    title: Nova 3 (Multi-Language)
    summary: Nova 3 (Multi-Language)
    description: >-
      Stream real-time multilingual transcripts from SLNG-hosted Deepgram Nova 3
      over WebSocket with automatic language detection across supported
      languages.
    tags:
      - name: Deepgram Nova 3
    servers:
      - $ref: '#/servers/production'
    messages:
      SlngDeepgramNova3MultiSttInitRequest:
        $ref: '#/components/messages/SlngDeepgramNova3MultiSttInitRequest'
      DeepgramSttBinaryAudio:
        $ref: '#/components/messages/DeepgramSttBinaryAudio'
      SttFinalizeMessage:
        $ref: '#/components/messages/SttFinalizeMessage'
      SttCloseMessage:
        $ref: '#/components/messages/SttCloseMessage'
      KeepaliveMessage:
        $ref: '#/components/messages/KeepaliveMessage'
      DeepgramSttMetadata:
        $ref: '#/components/messages/DeepgramSttMetadata'
      DeepgramSttResultsMulti:
        $ref: '#/components/messages/DeepgramSttResultsMulti'
      DeepgramSttError:
        $ref: '#/components/messages/DeepgramSttError'
    bindings:
      ws:
        method: GET
        headers:
          $ref: '#/components/schemas/WebsocketHeadersSlngNovaMulti'
operations:
  sttWhisperLargeV3ReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Initialize session on Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperLargeV3SttInitRequest
    description: Initialize session on Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Send audio frame to Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttAudioMessage
    description: Send audio frame to Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Force-finalize buffered audio on Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Whisper Large v3
    tags: []
  sttWhisperLargeV3ReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Close audio stream on Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttCloseMessage
    description: Close audio stream on Whisper Large v3
    tags: []
  sttWhisperLargeV3SendReady:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Receive ready signal from Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttReadyResponse
    description: Receive ready signal from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendPartialTranscript:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Receive partial transcript from Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttPartialTranscript
    description: Receive partial transcript from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendFinalTranscript:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Receive final transcript from Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SlngWhisperSttFinalTranscript
    description: Receive final transcript from Whisper Large v3
    tags: []
  sttWhisperLargeV3SendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3'
    summary: Receive error from Whisper Large v3
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1openai~1whisper:large-v3/messages/SttErrorResponse
    description: Receive error from Whisper Large v3
    tags: []
  sttSlngDeepgramNova3EnReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Initialize session on Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SlngDeepgramNova3EnSttInitRequest
    description: Initialize session on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Initialize session on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SlngDeepgramNova3TeSttInitRequest
    description: Initialize session on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Initialize session on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SlngDeepgramNova3MrSttInitRequest
    description: Initialize session on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Initialize session on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SlngDeepgramNova3KnSttInitRequest
    description: Initialize session on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Send audio frame to Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttBinaryAudio
    description: Send audio frame to Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Send audio frame to Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttBinaryAudio
    description: Send audio frame to Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Send audio frame to Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttBinaryAudio
    description: Send audio frame to Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Send audio frame to Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttBinaryAudio
    description: Send audio frame to Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Force-finalize buffered audio on Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Close audio stream on Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/SttCloseMessage
    description: Close audio stream on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Close audio stream on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/SttCloseMessage
    description: Close audio stream on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Close audio stream on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/SttCloseMessage
    description: Close audio stream on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Close audio stream on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/SttCloseMessage
    description: Close audio stream on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnReceiveKeepalive:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Send keepalive on Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/KeepaliveMessage
    description: Send keepalive on Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeReceiveKeepalive:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Send keepalive on Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/KeepaliveMessage
    description: Send keepalive on Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrReceiveKeepalive:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Send keepalive on Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/KeepaliveMessage
    description: Send keepalive on Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnReceiveKeepalive:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Send keepalive on Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/KeepaliveMessage
    description: Send keepalive on Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EnSendMetadata:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Receive Deepgram session metadata from Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttMetadata
    description: >
      Receive Deepgram Metadata message. Sent when the backend connects and
      again after the session ends. Informational — do not wait for it before
      streaming audio.
    tags: []
  sttSlngDeepgramNova3TeSendMetadata:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Receive Deepgram session metadata from Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttMetadata
    description: >
      Receive Deepgram Metadata message. Sent when the backend connects and
      again after the session ends. Informational — do not wait for it before
      streaming audio.
    tags: []
  sttSlngDeepgramNova3MrSendMetadata:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Receive Deepgram session metadata from Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttMetadata
    description: >
      Receive Deepgram Metadata message. Sent when the backend connects and
      again after the session ends. Informational — do not wait for it before
      streaming audio.
    tags: []
  sttSlngDeepgramNova3KnSendMetadata:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Receive Deepgram session metadata from Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttMetadata
    description: >
      Receive Deepgram Metadata message. Sent when the backend connects and
      again after the session ends. Informational — do not wait for it before
      streaming audio.
    tags: []
  sttSlngDeepgramNova3EnSendResults:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Receive transcription results from Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttResultsEn
    description: >
      Receive Deepgram Results message. Use is_final to distinguish partial
      (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3TeSendResults:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Receive transcription results from Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttResultsTe
    description: >
      Receive Deepgram Results message. Use is_final to distinguish partial
      (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3MrSendResults:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Receive transcription results from Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttResultsMr
    description: >
      Receive Deepgram Results message. Use is_final to distinguish partial
      (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3KnSendResults:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Receive transcription results from Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttResultsKn
    description: >
      Receive Deepgram Results message. Use is_final to distinguish partial
      (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3EnSendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en'
    summary: Receive error from Deepgram Nova 3 (English)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-en/messages/DeepgramSttError
    description: Receive error from Deepgram Nova 3 (English)
    tags: []
  sttSlngDeepgramNova3TeSendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te'
    summary: Receive error from Deepgram Nova 3 (Telugu)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-te/messages/DeepgramSttError
    description: Receive error from Deepgram Nova 3 (Telugu)
    tags: []
  sttSlngDeepgramNova3MrSendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr'
    summary: Receive error from Deepgram Nova 3 (Marathi)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-mr/messages/DeepgramSttError
    description: Receive error from Deepgram Nova 3 (Marathi)
    tags: []
  sttSlngDeepgramNova3KnSendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn'
    summary: Receive error from Deepgram Nova 3 (Kannada)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-kn/messages/DeepgramSttError
    description: Receive error from Deepgram Nova 3 (Kannada)
    tags: []
  sttSlngDeepgramNova3EsReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Initialize session on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SlngDeepgramNova3EsSttInitRequest
    description: Initialize session on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Send audio frame to Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttBinaryAudio
    description: Send audio frame to Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveFinalize:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Force-finalize buffered audio on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SttFinalizeMessage
    description: Force-finalize buffered audio on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveClose:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Close audio stream on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/SttCloseMessage
    description: Close audio stream on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsReceiveKeepalive:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Send keepalive on Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/KeepaliveMessage
    description: Send keepalive on Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3EsSendMetadata:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Receive Deepgram session metadata from Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttMetadata
    description: >
      Receive Deepgram Metadata message. Sent when the backend connects and
      again after the session ends. Informational — do not wait for it before
      streaming audio.
    tags: []
  sttSlngDeepgramNova3EsSendResults:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Receive transcription results from Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttResultsEs
    description: >
      Receive Deepgram Results message. Use is_final to distinguish partial
      (interim) from final transcripts, and speech_final for end-of-utterance.
    tags: []
  sttSlngDeepgramNova3EsSendError:
    action: send
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es'
    summary: Receive error from Deepgram Nova 3 (Spanish)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-es/messages/DeepgramSttError
    description: Receive error from Deepgram Nova 3 (Spanish)
    tags: []
  sttSlngDeepgramNova3InReceiveInit:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in'
    summary: Initialize session on Deepgram Nova 3 (Indonesian)
    messages:
      - $ref: >-
          #/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in/messages/SlngDeepgramNova3InSttInitRequest
    description: Initialize session on Deepgram Nova 3 (Indonesian)
    tags: []
  sttSlngDeepgramNova3InReceiveAudio:
    action: receive
    channel:
      $ref: '#/channels/~1v1~1stt~1slng~1deepgram~1nova:3-in'
    summary: Send audio frame to Deepgram Nova 3 (Indonesian)
    messages:
      - $re

# --- truncated at 32 KB (113 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/slng/refs/heads/main/asyncapi/slng-stt-slng-asyncapi.yml

Work with this as data

Every AsyncAPI spec here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for asyncapi

4 MCP tools reach this
  • find_asyncapisBrowse and filter every AsyncAPI spec in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This AsyncAPI spec 
curl "https://apis.io/api/v1/asyncapis/slng-stt-slng-asyncapi"
All asyncapi 
curl "https://apis.io/api/v1/asyncapis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.