> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chatzy.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Initiate Outbound WhatsApp Call

The **Initiate Outbound WhatsApp Call** action allows your Journey to automatically trigger a phone call handled by a **Voice AI Agent**. This is useful for use cases like appointment reminders, lead callbacks, support follow-ups, and more.

<Frame>
  <img src="https://mintcdn.com/chatzyai/bODSoRa4F83y0jCR/journey/studio/actions/initiate-outbound-whatsapp-call.png?fit=max&auto=format&n=bODSoRa4F83y0jCR&q=85&s=740a83b5b898cce109bd954c58998cce" className="rounded-lg" width="1920" height="1001" data-path="journey/studio/actions/initiate-outbound-whatsapp-call.png" />
</Frame>

***

## Configuration Fields

### **Phone Number**

This is the number the Voice AI Agent will call.

Pass the number using Journey variables:

```handlebars theme={null}
{{inbound_webhook.phone_number}}
```

***

### **Voice AI Agent**

Select which **Voice Agent** should handle the outbound call.

* The chosen Voice Agent will speak the intro message, follow the Base Prompt, and run the full voice flow.
* Make sure the agent is properly configured with:
  * Voice settings
  * Telephony settings
  * Base prompt
  * Model & engine

***

## Example Use Case

### **Scenario: Auto‑callback for Appointment Booking**

A CRM sends booking details via webhook:

```json theme={null}
{
  "name": "Amit",
  "phone_number": "918765432101",
  "appointment_slot": "Today at 4 PM"
}
```

Your Journey contains this action:

* Phone Number → `{{inbound_webhook.phone_number}}`
* Voice AI Agent → **Appointment booking agent**

The AI Agent calls the customer automatically to:

* Confirm the appointment
* Reschedule if needed
* Capture additional info

***