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

# ERR_NGROK_NOTIFICATIONS_SLACK_CHANNEL_POST_DENIED: The ngrok app is not in the Slack channel CHANNEL

> ERR_NGROK_NOTIFICATIONS_SLACK_CHANNEL_POST_DENIED: The ngrok app is not in the Slack channel CHANNEL. Learn why ngrok returns this error and how to fix it.

## What does ERR\_NGROK\_NOTIFICATIONS\_SLACK\_CHANNEL\_POST\_DENIED mean?

ngrok returns ERR\_NGROK\_NOTIFICATIONS\_SLACK\_CHANNEL\_POST\_DENIED with this message:

```text theme={"theme":{"light":"css-variables","dark":"css-variables"}}
The ngrok app is not in the Slack channel <CHANNEL>. Invite the app to the channel.
```

> [!TIP]
>
> Troubleshoot ERR\_NGROK\_NOTIFICATIONS\_SLACK\_CHANNEL\_POST\_DENIED with your AI agent.
> Connect it to the [ngrok MCP server](https://ngrok.com/docs/mcp-server.md), then ask what caused the error and how to fix it.

## Where can I get more help with ERR\_NGROK\_NOTIFICATIONS\_SLACK\_CHANNEL\_POST\_DENIED?

Email [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_NOTIFICATIONS_SLACK_CHANNEL_POST_DENIED) and include the error code.


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