ElevenLabs requires your own API key configured in your Telnyx account. Telnyx relays requests to the ElevenLabs API — voice settings are passed through directly.
elevenlabs.<Model>.<VoiceId>
Example: elevenlabs.v3.Adam
voice_id is a voice from your own ElevenLabs account — pre-built, cloned, or designed. Preview voices at elevenlabs.io/voice-library.
WebSocket
Query Parameters
| Parameter | Type | Default | Description |
|---|
audio_format | string | mp3 | mp3, linear16, mulaw. |
sample_rate | integer | — | 8000, 16000, 22050, 24000, 44100. |
language | string | — | BCP-47 language code. |
Voice Settings
Relayed directly to the ElevenLabs API. Any field ElevenLabs accepts can be passed here.
| Field | Type | Default | Description |
|---|
model_id | string | — | ElevenLabs model override (e.g. eleven_multilingual_v2). |
language_code | string | — | BCP-47. Overrides language query param. |
stability | float | — | 0.0–1.0. Voice consistency. |
similarity_boost | float | — | 0.0–1.0. Clarity and similarity to original voice. |
style | float | — | 0.0–1.0. Style exaggeration. |
use_speaker_boost | boolean | — | Speaker boost toggle for clarity. |
{
"text": " ",
"voice_settings": {
"stability": 0.5,
"similarity_boost": 0.75,
"style": 0.3
}
}
REST API
Fields
| Field | Type | Default | Description |
|---|
model_id | string | — | ElevenLabs model override. |
stability | float | — | 0.0–1.0. Voice consistency. |
similarity_boost | float | — | 0.0–1.0. Clarity and similarity. |
style | float | — | 0.0–1.0. Style exaggeration. |
use_speaker_boost | boolean | — | Speaker boost toggle. |
output_type | string | binary_output | binary_output, base64_output, or audio_id. |
Response
Default (binary_output): chunked audio bytes. Format determined by ElevenLabs.
With output_type: "base64_output": JSON with base64-encoded audio.
With output_type: "audio_id": JSON with an audio_url for deferred retrieval.
