ElevenLabs

Add the credential

Open Settings > Model Providers, click Add Model Provider and select ElevenLabs. Give the row a name, pick the organization, team or project it belongs to, and fill in:

Field	Value
`ELEVENLABS_API_KEY`	Your ElevenLabs API key.
`ELEVENLABS_WEBHOOK_SECRET`	Optional. The secret ElevenLabs signs post-call webhooks with, for Conversational AI usage reporting.
`ELEVENLABS_BASE_URL`	Optional. A residency host on `elevenlabs.io`, over HTTPS.

Save the row. Every virtual key whose scope can see the row can now dispatch to it, unless the key restricts its providers. See Virtual keys.

The ElevenLabs model provider drawer with ELEVENLABS_API_KEY, ELEVENLABS_WEBHOOK_SECRET, ELEVENLABS_BASE_URL and the routing handle elevenlabs — The ElevenLabs row: ELEVENLABS_API_KEY, the optional webhook secret and base URL, and the routing handle elevenlabs.

Model names

Write elevenlabs/<model_id>, for example elevenlabs/eleven_flash_v2_5 or elevenlabs/eleven_multilingual_v2. eleven_multilingual_v2 is the default when a speech request names no model.

Send a request

With the OpenAI audio routes:

curl https://gateway.langwatch.ai/v1/audio/speech \
  -H "Authorization: Bearer $LANGWATCH_VIRTUAL_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "elevenlabs/eleven_flash_v2_5",
    "voice": "<voice_id>",
    "input": "Hello from ACME"
  }'

With the ElevenLabs SDKs, set the base URL to https://gateway.langwatch.ai and the virtual key as the API key. The SDK sends it in the Xi-Api-Key header, which the gateway accepts.

Endpoints

Endpoint	Served
`POST /v1/audio/speech`	Yes. An OpenAI `response_format` of `pcm` is sent as `pcm_24000`
`POST /v1/audio/transcriptions`	Yes
`POST /v1/text-to-speech/{voice_id}`	Yes, the ElevenLabs native route
`POST /v1/speech-to-text`	Yes, the ElevenLabs native route
`GET /v1/convai/conversation/get-signed-url`	Yes, for Conversational AI sessions
`POST /v1/chat/completions`, `POST /v1/embeddings`	No

Last modified on September 6, 2026

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Add the credential

Model names

Send a request

Endpoints

​Add the credential

​Model names

​Send a request

​Endpoints

Add the credential

Model names

Send a request

Endpoints