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

# WhatsApp Business API

> Pair Callaro voice outcomes with WhatsApp follow-up workflows for confirmation, reminders, and nurture.

# WhatsApp is a strong follow-up channel after a call when you need an asynchronous confirmation or reminder path.

## Prerequisites

* WhatsApp Business API provider setup.
* Template approval for outbound messages where required.
* Consent policy and opt-out handling defined.

## Recommended flow

1. Trigger WhatsApp follow-up only for selected outcomes.
2. Send structured post-call summary or confirmation message.
3. Capture reply status and route back to CRM/work queue.
4. Keep voice and WhatsApp interaction history linked by contact ID.

## Validation checklist

* Message template renders correctly for target locale.
* Follow-up messages are logged in CRM timeline.
* Opt-out and failure events are handled cleanly.

## Known limits

* Template approval can delay rollout.
* Message delivery windows and policy constraints vary by region.
* WhatsApp is best for follow-up, not deep qualification.

Use WhatsApp for post-call continuity, not as a substitute for voice qualification. Keep the channel handoff explicit in your CRM so reps know what happened.