TL;DR: The official WhatsApp Business Cloud API cannot send messages to Channels or Groups, only one-to-one messages to opted-in recipients. There is no documented endpoint for it, and Meta has not announced one. Third-party providers and unofficial libraries can automate channels or groups through unofficial paths, but they carry a real risk of the business number being blocked for mass activity.

```text
The Cloud API cannot message channels or groups, only direct chats
```

## Fix
1. The official WhatsApp Business Cloud API cannot send messages to Channels or Groups, only one-to-one messages to opted-in recipients.
   Expected: this specific failure stops.
2. There is no documented endpoint for it, and Meta has not announced one.
   Expected: this specific failure stops.
3. Third-party providers and unofficial libraries can automate channels or groups through unofficial paths, but they carry a real risk of the business number being blocked for mass activity.
   Expected: this specific failure stops.
4. If an agent needs broadcast-style reach, the supported route is template messages to many individual recipients, with opt-in captured first.
   Expected: this specific failure stops.

## Details
The official WhatsApp Business Cloud API cannot send messages to Channels or Groups, only one-to-one messages to opted-in recipients. There is no documented endpoint for it, and Meta has not announced one. Third-party providers and unofficial libraries can automate channels or groups through unofficial paths, but they carry a real risk of the business number being blocked for mass activity. If an agent needs broadcast-style reach, the supported route is template messages to many individual recipients, with opt-in captured first. Context: Stack Overflow #78899979 (accepted answer): asks whether the official Cloud API can send to WhatsApp Channels and Groups, noting third-party providers claim to. The accepted answer says Meta's official API has no such feature, only direct messages, and unofficial libraries that do it risk the number being blocked.

## When to use
You hit exactly this: The Cloud API cannot message channels or groups, only direct chats in The Cloud API.

## When not to use
A different error, or the same symptom in a different tool. This page only covers the failure above.

## Compatibility
The Cloud API.