openclaw/extensions/voice-call

@clawdbot/voice-call

Official Voice Call plugin for Clawdbot.

Providers:

• Twilio (Programmable Voice + Media Streams)
• Telnyx (Call Control v2)
• Plivo (Voice API + XML transfer + GetInput speech)
• Mock (dev/no network)

Docs: https://docs.clawd.bot/plugins/voice-call Plugin system: https://docs.clawd.bot/plugin

Install (local dev)

Option A: install via Clawdbot (recommended)

clawdbot plugins install @clawdbot/voice-call

Restart the Gateway afterwards.

Option B: copy into your global extensions folder (dev)

mkdir -p ~/.clawdbot/extensions
cp -R extensions/voice-call ~/.clawdbot/extensions/voice-call
cd ~/.clawdbot/extensions/voice-call && pnpm install

Config

Put under plugins.entries.voice-call.config:

{
  provider: "twilio", // or "telnyx" | "plivo" | "mock"
  fromNumber: "+15550001234",
  toNumber: "+15550005678",

  twilio: {
    accountSid: "ACxxxxxxxx",
    authToken: "your_token"
  },

  plivo: {
    authId: "MAxxxxxxxxxxxxxxxxxxxx",
    authToken: "your_token"
  },

  // Webhook server
  serve: {
    port: 3334,
    path: "/voice/webhook"
  },

  // Public exposure (pick one):
  // publicUrl: "https://example.ngrok.app/voice/webhook",
  // tunnel: { provider: "ngrok" },
  // tailscale: { mode: "funnel", path: "/voice/webhook" }

  outbound: {
    defaultMode: "notify" // or "conversation"
  },

  streaming: {
    enabled: true,
    streamPath: "/voice/stream"
  }
}

Notes:

• Twilio/Telnyx/Plivo require a publicly reachable webhook URL.
• mock is a local dev provider (no network calls).

TTS for calls

Voice Call uses the core messages.tts configuration (OpenAI or ElevenLabs) for streaming speech on calls. You can override it under the plugin config with the same shape — overrides deep-merge with messages.tts.

{
  tts: {
    provider: "openai",
    openai: {
      voice: "alloy"
    }
  }
}

Notes:

• Edge TTS is ignored for voice calls (telephony audio needs PCM; Edge output is unreliable).
• Core TTS is used when Twilio media streaming is enabled; otherwise calls fall back to provider native voices.

CLI

clawdbot voicecall call --to "+15555550123" --message "Hello from Clawdbot"
clawdbot voicecall continue --call-id <id> --message "Any questions?"
clawdbot voicecall speak --call-id <id> --message "One moment"
clawdbot voicecall end --call-id <id>
clawdbot voicecall status --call-id <id>
clawdbot voicecall tail
clawdbot voicecall expose --mode funnel

Tool

Tool name: voice_call

Actions:

• initiate_call (message, to?, mode?)
• continue_call (callId, message)
• speak_to_user (callId, message)
• end_call (callId)
• get_status (callId)

Gateway RPC

• voicecall.initiate (to?, message, mode?)
• voicecall.continue (callId, message)
• voicecall.speak (callId, message)
• voicecall.end (callId)
• voicecall.status (callId)

Notes

• Uses webhook signature verification for Twilio/Telnyx/Plivo.
• responseModel / responseSystemPrompt control AI auto-responses.
• Media streaming requires ws and OpenAI Realtime API key.