> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.vapi.ai/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.vapi.ai/_mcp/server.

# Voicemail Detection & Handling Improvements

1. **Enhanced Beep Detection**: Improve voicemail detection accuracy with [`CreateVoicemailToolDTO.beepDetectionEnabled`](https://api.vapi.ai/api#:~:text=CreateVoicemailToolDTO.beepDetectionEnabled) specifically for Twilio-based calls. This feature detects the characteristic beep sound that indicates voicemail recording has started.

2. **Workflow Voicemail Integration**: Configure comprehensive voicemail handling in workflows with enhanced message and detection capabilities:
   * [`Workflow.voicemailMessage`](https://api.vapi.ai/api#:~:text=Workflow.voicemailMessage): Custom messages for voicemail scenarios (up to 1000 characters)
   * [`Workflow.voicemailDetection`](https://api.vapi.ai/api#:~:text=Workflow.voicemailDetection): Configurable detection methods for different providers

3. **Assistant Voicemail Enhancement**: Improved voicemail handling in assistant configurations with [`Assistant.voicemailMessage`](https://api.vapi.ai/api#:~:text=Assistant.voicemailMessage) and [`Assistant.voicemailDetection`](https://api.vapi.ai/api#:~:text=Assistant.voicemailDetection) for consistent behavior across all conversation types.

4. **Multiple Detection Methods**: Choose from various voicemail detection providers:
   * **Google**: [`GoogleVoicemailDetectionPlan`](https://api.vapi.ai/api#:~:text=GoogleVoicemailDetectionPlan) for AI-powered detection
   * **OpenAI**: [`OpenAIVoicemailDetectionPlan`](https://api.vapi.ai/api#:~:text=OpenAIVoicemailDetectionPlan) for intelligent voicemail recognition
   * **Twilio**: [`TwilioVoicemailDetectionPlan`](https://api.vapi.ai/api#:~:text=TwilioVoicemailDetectionPlan) for carrier-level detection
   * **Vapi**: [`VapiVoicemailDetectionPlan`](https://api.vapi.ai/api#:~:text=VapiVoicemailDetectionPlan) for integrated detection

5. **Beep Detection for Call Flows**: The new beep detection capability works specifically with Twilio transport, providing reliable voicemail identification when traditional detection methods may not be sufficient.

6. **Voicemail Tool Configuration**: Enhanced tool rejection and messaging capabilities ensure appropriate handling when voicemail is detected, with configurable responses based on your business requirements.

> **Warning**
>
> Beep detection is currently available only for Twilio-based calls. If you're using other providers, consider combining multiple detection methods for better accuracy.

## Voicemail Management Features

#### Multi-Provider Detection

Support for Google, OpenAI, Twilio, and Vapi detection methods, allowing you to choose the best option for your use case.

#### Beep Detection

Advanced audio analysis to detect voicemail beeps on Twilio calls for more reliable voicemail identification.

#### Custom Messaging

Configure personalized voicemail messages up to 1000 characters for better user experience and brand consistency.

#### Workflow Integration

Comprehensive voicemail handling throughout workflow nodes with consistent configuration across conversation flows.