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Introduction to WhatsApp Calling

WhatsApp Calling allows your company to extend communication on WhatsApp by offering voice calls (VoIP) directly to your customers. Use calls for quick confirmations, technical support, or finalizing interactions started via chat.

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When to use WhatsApp Calling

WhatsApp Calling is ideal for:
  • Quick confirmations: verify information with the customer without waiting for text responses
  • Technical support: diagnose issues more efficiently than through messages
  • Finalizing interactions: complete support started via chat with a voice call
  • High-priority communication: reach your customer immediately and directly

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How it works

When your company uses the WhatsApp Calling API:
  • Your company initiates the call: you can start voice calls (VoIP) directly with customers through WhatsApp via the API.
  • The customer accepts or rejects: the customer receives the call in their WhatsApp app and can accept or reject it.
  • Your company ends the call: you can end an ongoing call at any time.

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Prerequisites

To use WhatsApp Calling, your number must meet the following requirements:
Calling enabled on the number: the WhatsApp Calling feature must be enabled for your phone number. This is done via Positus Studio or with support from our team.
Calls webhook configured: you must configure a webhook URL (calls_webhook) to receive call events. This is also done via Positus Studio or support — it is not available via public API.
Call events arrive in a separate webhook from the messaging webhook. Make sure both are configured correctly.

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Next steps

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