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

# Channels

> Understand WhatsApp QR, Meta WhatsApp, SMS, and unified delivery modes.

KarFlows can deliver through multiple channels.

## Supported channel IDs

| Channel ID      | Meaning                                      |
| --------------- | -------------------------------------------- |
| `whatsapp_qr`   | Send from a connected WhatsApp QR device     |
| `whatsapp_meta` | Send with Meta WhatsApp Cloud API            |
| `sms`           | Send a text SMS through KarFlows SMS Gateway |

## Fallback delivery

Fallback mode tries channels in order and stops when one succeeds.

```json theme={null}
{
  "channels": ["whatsapp_qr", "whatsapp_meta", "sms"],
  "deliveryMode": "fallback"
}
```

Recommended for order alerts, booking confirmations, and OTP cost control.

## Send to all

All mode sends to every selected channel.

```json theme={null}
{
  "channels": ["whatsapp_qr", "sms"],
  "deliveryMode": "all"
}
```

Recommended only when the message must arrive in multiple places. Each successful channel can be charged separately.

## WhatsApp QR sender selection

If the customer has more than one QR device, pass `whatsappFrom`.

```json theme={null}
{
  "whatsappFrom": "447405993704"
}
```

KarFlows validates that the sender belongs to the same customer account.

## Meta sender selection

Meta sending uses the customer's connected WhatsApp Business account. If a template is required, include the template data requested by your KarFlows Meta API setup.