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Documentation Index

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OpenClaw uses ElevenLabs for text-to-speech, batch speech-to-text with Scribe v2, and streaming STT with Scribe v2 Realtime.
CapabilityOpenClaw surfaceDefault
Text-to-speechmessages.tts / talkeleven_multilingual_v2
Batch speech-to-texttools.media.audioscribe_v2
Streaming speech-to-textVoice Call streaming or Google Meet realtime.transcriptionProviderscribe_v2_realtime

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Authentication

Set ELEVENLABS_API_KEY in the environment. XI_API_KEY is also accepted for compatibility with existing ElevenLabs tooling. 
export ELEVENLABS_API_KEY="..."

​
Text-to-speech

{
  messages: {
    tts: {
      providers: {
        elevenlabs: {
          apiKey: "${ELEVENLABS_API_KEY}",
          voiceId: "pMsXgVXv3BLzUgSXRplE",
          modelId: "eleven_multilingual_v2",
        },
      },
    },
  },
}
Set modelId to eleven_v3 to use ElevenLabs v3 TTS. OpenClaw keeps eleven_multilingual_v2 as the default for existing installs. Discord voice channels use ElevenLabs’ streaming TTS endpoint when ElevenLabs is the selected voice.tts/messages.tts provider. Playback starts from the returned audio stream instead of waiting for OpenClaw to download and write the whole audio file first. latencyTier maps to ElevenLabs’ optimize_streaming_latency query parameter for models that accept it; OpenClaw omits that parameter for eleven_v3, which rejects it.

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Speech-to-text

Use Scribe v2 for inbound audio attachments and short recorded voice segments: 
{
  tools: {
    media: {
      audio: {
        enabled: true,
        models: [{ provider: "elevenlabs", model: "scribe_v2" }],
      },
    },
  },
}
OpenClaw sends multipart audio to ElevenLabs /v1/speech-to-text with model_id: "scribe_v2". Language hints map to language_code when present.

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Streaming STT

The bundled elevenlabs plugin registers Scribe v2 Realtime for Voice Call and Google Meet agent-mode streaming transcription.
SettingConfig pathDefault
API keyplugins.entries.voice-call.config.streaming.providers.elevenlabs.apiKeyFalls back to ELEVENLABS_API_KEY / XI_API_KEY
Model...elevenlabs.modelIdscribe_v2_realtime
Audio format...elevenlabs.audioFormatulaw_8000
Sample rate...elevenlabs.sampleRate8000
Commit strategy...elevenlabs.commitStrategyvad
Language...elevenlabs.languageCode(unset)
{
  plugins: {
    entries: {
      "voice-call": {
        config: {
          streaming: {
            enabled: true,
            provider: "elevenlabs",
            providers: {
              elevenlabs: {
                apiKey: "${ELEVENLABS_API_KEY}",
                audioFormat: "ulaw_8000",
                commitStrategy: "vad",
                languageCode: "en",
              },
            },
          },
        },
      },
    },
  },
}
Voice Call receives Twilio media as 8 kHz G.711 u-law. The ElevenLabs realtime provider defaults to ulaw_8000, so telephony frames can be forwarded without transcoding.
For Google Meet agent mode, set plugins.entries.google-meet.config.realtime.transcriptionProvider to "elevenlabs" and configure the same provider block under plugins.entries.google-meet.config.realtime.providers.elevenlabs.