Bug type

Regression (worked before, now fails)

Summary

When initiating outbound calls via the Twilio API directly (instead of using openclaw voicecall call), the voice-call plugin rejects the MediaStream connection with:

[MediaStream] Stream started: MZxxxxxxx (call: CAxxxxxxx)
[MediaStream] Rejecting stream for unknown call: CAxxxxxxx

This results in the call being immediately terminated after the recipient answers.

Steps to reproduce

1. Configure voice-call plugin with valid Twilio credentials:

{
  "plugins": {
    "entries": {
      "voice-call": {
        "enabled": true,
        "config": {
          "provider": "twilio",
          "fromNumber": "+43463393036",
          "twilio": {
            "accountSid": "ACxxxxxxxx",
            "authToken": "..."
          },
          "serve": {
            "port": 3334,
            "bind": "127.0.0.1",
            "path": "/voice/webhook"
          },
          "publicUrl": "https://example.com",
          "streaming": {
            "enabled": true,
            "streamPath": "/voice/stream",
            "openaiApiKey": "sk-..."
          },
          "tts": {
            "provider": "elevenlabs",
            "elevenlabs": {
              "voiceId": "..."
            }
          },
          "outbound": {
            "defaultMode": "conversation"
          },
          "inboundPolicy": "open"
        }
      }
    }
  },
  "messages": {
    "tts": {
      "provider": "elevenlabs",
      "elevenlabs": {
        "apiKey": "sk_...",
        "voiceId": "...",
        "modelId": "eleven_multilingual_v2"
      }
    }
  }
}

2. Configure nginx to proxy /voice/webhook and /voice/stream to port 3334

3. Initiate call via Twilio API:

curl -X POST "https://api.twilio.com/2010-04-01/Accounts/ACxxxxxxxx/Calls.json" \
  -u "ACxxxxxxxx:auth_token" \
  -d "To=+436769106604" \
  -d "From=+43463393036" \
  -d "Url=https://example.com/voice/webhook"

4. Answer the call on the recipient's phone

Expected behavior

• The call should connect successfully
• The webhook should generate valid TwiML with <Connect><Stream>
• The MediaStream WebSocket should be accepted
• TTS (ElevenLabs) audio should be streamed to the call

Actual behavior

• Webhook responds with valid TwiML (200 OK, 227 bytes)
• MediaStream WebSocket connects
• BUT: Plugin logs [MediaStream] Rejecting stream for unknown call
• Call is immediately terminated
• No audio is played

OpenClaw version

OpenClaw Version: 2026.2.26

Operating system

OS: Linux (Ubuntu)

Install method

No response

Logs, screenshots, and evidence

**nginx access log:**

POST /voice/webhook HTTP/1.1" 200 227 "-" "TwilioProxy/1.1"
GET /voice/stream HTTP/1.1" 101 16 "-" "Twilio.TmeWs/1.0"


**OpenClaw Gateway logs:**

[voice-call] WebSocket upgrade for media stream
[MediaStream] Twilio connected
[MediaStream] Stream started: MZxxxxxxx (call: CAxxxxxxx)
[MediaStream] Rejecting stream for unknown call: CAxxxxxxx


## Root Cause Analysis

After extensive debugging, it appears the plugin only accepts calls that it **internally tracks** via the `CallManager`. Calls initiated externally (via Twilio API) are not registered in the manager and are therefore rejected.

**Relevant code** (speculation based on behavior):

shouldAcceptStream: ({ callId }) => {
  const call = this.manager.getCallByProviderCallId(callId);
  if (!call) {
    return false; // ← Rejects external calls
  }
  return true;
}

Impact and severity

No response

Additional information

No response