Voice Tools
Voicemail Drop
Automatically leave pre-recorded voicemail messages when your outbound call reaches an answering machine.
Voicemail Drop
The Voicemail Drop tool detects when an outbound call reaches voicemail and automatically leaves a pre-recorded or AI-generated message. Instead of the AI agent awkwardly talking to an answering machine, it leaves a clean, professional voicemail.
How It Works
- Your agent makes an outbound call.
- The call goes to voicemail (answering machine detected).
- The agent waits for the beep.
- The agent plays your configured voicemail message.
- The call ends automatically.
Configuration
Via the Dashboard
- Open your agent and scroll to Voice Settings.
- Enable Voicemail Drop.
- Configure:
| Setting | Description |
|---|---|
| Message type | Pre-recorded audio file or AI-generated text |
| Message text | The voicemail script (for AI-generated) |
| Audio file | Upload an MP3/WAV file (for pre-recorded) |
| Retry on voicemail | Retry the call later instead of leaving a message |
| Max retries | Number of retry attempts before leaving a voicemail |
Via the API
curl -X PATCH https://api.thinnest.ai/agents/agent_abc123 \
-H "Authorization: Bearer $THINNESTAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"voice_tools": {
"voicemail_drop": {
"enabled": true,
"message_type": "text",
"message": "Hi, this is a call from Acme Corp regarding your recent inquiry. Please call us back at 1-800-555-0123 at your earliest convenience. Thank you!",
"retry_on_voicemail": true,
"max_retries": 2
}
}
}'Voicemail Detection
thinnestAI uses audio analysis to detect voicemail greetings. Detection accuracy is high but not 100%. You can configure the sensitivity:
| Sensitivity | Behavior |
|---|---|
low | Only triggers on clear voicemail signals (fewer false positives) |
medium (default) | Balanced detection |
high | Aggressive detection (may occasionally trigger on slow human pickups) |
Best Practices
- Keep voicemail messages under 30 seconds.
- Include a callback number and reason for the call.
- For campaigns, personalize the message with the contact's name.
- Use the retry option for important calls before falling back to voicemail.