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unleash.unleash/website/docs/addons/slack.md
2022-03-15 17:44:58 -05:00

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---
id: slack
title: Slack
---
> This feature was introduced in _Unleash v3.11.0_.
The Slack addon allows Unleash to post Updates when a feature toggle is updated. To set up Slack, you need to configure an incoming Slack webhook URL. You can follow [Sending messages using Incoming Webhooks](https://api.slack.com/incoming-webhooks) on how to do that. You can also choose to [create a slack app for Unleash](https://api.slack.com/apps), which will provide you with additional functionality to control how Unleash communicates messages on your Slack workspace.
The Slack addon will perform a single retry if the HTTP POST against the Slack Webhook URL fails (either a 50x or network error). Duplicate events may happen. You should never assume events always comes in order.
## Configuration {#configuration}
#### Events {#events}
You can choose to trigger updates for the following events:
- feature-created
- feature-updated (*)
- feature-metadata-updated
- feature-project-change
- feature-archived
- feature-revived
- feature-strategy-update
- feature-strategy-add
- feature-strategy-remove
- feature-stale-on
- feature-stale-off
- feature-environment-enabled
- feature-environment-disabled
> *) Deprecated, and will not be used after transition to environments in Unleash v4.3
#### Parameters {#parameters}
Unleash Slack addon takes the following parameters.
- **Slack Webhook URL** - This is the only required property. If you are using a Slack Application you must also make sure your application is allowed to post to the channel you want to post to.
- **Username** - Used to override the username used to post the update to a Slack channel.
- **Emoji Icon** - Used to override the emoji icon used to post the update to a Slack channel.
- **Default channel** - Where to post the message if the feature toggles has not overridden the channel via the slack tags.
#### Global configuration
- **Unleash URL** - The slack plugin uses the `server.unleashUrl` property to create the link back to Unleash in the posts. This can be set using the **UNLEASH_URL** environment variable or the `server.unleashUrl` property when starting the server from node.
#### Tags {#tags}
The Slack addon also defined the Tag type "slack". You may use this tag to override which Slack channel Unleash should post updates to for this feature toggle.
![Slack Tags](/img/slack_addon_tags.png)
In the picture you can see we have defined two slack tags for the "new-payment-system" toggle. In this example Unleash will post updates to the **#notifications** and **#random** channel.