v47

latestOpenAPI 3.1.0raw.githubusercontent.com2026-06-181,0851,7264.5 MB

Conference Commands

Speak text to conference participants

Convert text to speech and play it to all or some participants.

post/conferences/{id}/actions/speak

Path parameters

idstring required

Specifies the conference by id or name

Request body

call_control_idsstring[]

Call Control IDs of participants who will hear the spoken text. When empty all participants will hear the spoken text.

payloadstring required

The text or SSML to be converted into speech. There is a 3,000 character limit.

payload_type'text' | 'ssml'

The type of the provided payload. The payload can either be plain text, or Speech Synthesis Markup Language (SSML).

voicestring required

Specifies the voice used in speech synthesis.

Define voices using the format <Provider>.<Model>.<VoiceId>. Specifying only the provider will give default values for voice_id and model_id.

Supported Providers:

AWS: Use AWS.Polly.<VoiceId> (e.g., AWS.Polly.Joanna). For neural voices, which provide more realistic, human-like speech, append -Neural to the VoiceId (e.g., AWS.Polly.Joanna-Neural). Check the available voices for compatibility.
Azure: Use Azure.<VoiceId> (e.g., Azure.en-CA-ClaraNeural, Azure.en-US-BrianMultilingualNeural, Azure.en-US-Ava:DragonHDLatestNeural). For a complete list of voices, go to Azure Voice Gallery. Use voice_settings to configure custom deployments, regions, or API keys.
ElevenLabs: Use ElevenLabs.<ModelId>.<VoiceId> (e.g., ElevenLabs.eleven_multilingual_v2.21m00Tcm4TlvDq8ikWAM). The ModelId part is optional. To use ElevenLabs, you must provide your ElevenLabs API key as an integration identifier secret in "voice_settings": {"api_key_ref": "<secret_identifier>"}. See integration secrets documentation for details. Check available voices.
Telnyx: Use Telnyx.<model_id>.<voice_id> (e.g., Telnyx.KokoroTTS.af). Use voice_settings to configure voice_speed and other synthesis parameters.
Minimax: Use Minimax.<ModelId>.<VoiceId> (e.g., Minimax.speech-02-hd.Wise_Woman). Supported models: speech-02-turbo, speech-02-hd, speech-2.6-turbo, speech-2.8-turbo. Use voice_settings to configure speed, volume, pitch, and language_boost.
Rime: Use Rime.<model_id>.<voice_id> (e.g., Rime.Arcana.cove). Supported model_ids: Arcana, Mist, ArcanaV3, Coda. Use voice_settings to configure voice_speed.
Resemble: Use Resemble.Turbo.<voice_id> (e.g., Resemble.Turbo.my_voice). Only Turbo model is supported. Use voice_settings to configure precision, sample_rate, and format.
Inworld: Use Inworld.<ModelId>.<VoiceId> (e.g., Inworld.Mini.Loretta, Inworld.Max.Oliver, Inworld.TTS2.Loretta). Supported models: Mini, Max, TTS2. Use voice_settings to configure delivery_mode (STABLE, BALANCED, CREATIVE), supported by TTS2 only.
xAI: Use xAI.<VoiceId> (e.g., xAI.eve). Available voices: eve, ara, rex, sal, leo.

For service_level basic, you may define the gender of the speaker (male or female).

The language you want spoken. This parameter is ignored when a Polly.* voice is specified.

command_idstring

Use this field to avoid execution of duplicate commands. Telnyx will ignore subsequent commands with the same command_id as one that has already been executed.

region'Australia' | 'Europe' | 'Middle East' | 'US'

Region where the conference data is located. Defaults to the region defined in user's data locality settings (Europe or US).

Example request

{
  "call_control_ids": [
    "v3:MdI91X4lWFEs7IgbBEOT9M4AigoY08M0WWZFISt1Yw2axZ_IiE4pqg"
  ],
  "payload": "Say this to participants",
  "payload_type": "text",
  "voice": "female",
  "language": "en-US",
  "command_id": "891510ac-f3e4-11e8-af5b-de00688a4901"
}

Response

Successful response upon making a conference command.

Example response

{
  "data": {
    "result": "ok"
  }
}