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# GitLab Slack application **(FREE ONLY)**
> - Introduced in GitLab 9.4.
> - Distributed to Slack App Directory in GitLab 10.2.
NOTE: **Note:**
The GitLab Slack application is only configurable for GitLab.com. It will **not**
work for on-premises installations where you can configure the
[Slack slash commands](slack_slash_commands.md) service instead. We're planning
to make this configurable for all GitLab installations, but there's
no ETA - see [#28164](https://gitlab.com/gitlab-org/gitlab/issues/28164).
Slack provides a native application which you can enable via your project's
integrations on GitLab.com.
## Slack App Directory
The simplest way to enable the GitLab Slack application for your workspace is to
install the [GitLab application](https://slack-platform.slack.com/apps/A676ADMV5-gitlab) from
the [Slack App Directory](https://slack.com/apps).
Clicking install will take you to the
[GitLab Slack application landing page](https://gitlab.com/profile/slack/edit)
where you can select a project to enable the GitLab Slack application for.
![GitLab Slack application landing page](img/gitlab_slack_app_landing_page.png)
## Configuration
Alternatively, you can configure the Slack application with a project's
integration settings.
Keep in mind that you need to have the appropriate permissions for your Slack
team in order to be able to install a new application, read more in Slack's
docs on [Adding an app to your team](https://slack.com/help/articles/202035138).
To enable GitLab's service for your Slack team:
1. Go to your project's **{settings}** **Settings > Integration > Slack application** (only
visible on GitLab.com).
1. Click **Add to Slack**.
That's all! You can now start using the Slack slash commands.
## Create a project alias for Slack
To create a project alias on GitLab.com for Slack integration:
1. Go to your project's home page.
1. Navigate to **{settings}** **Settings > Integrations** (only visible on GitLab.com)
1. On the **Integrations** page, click **Slack application**.
1. The current **Project Alias**, if any, is displayed. To edit this value,
click **Edit**.
1. Enter your desired alias, and click **Save changes**.
Some Slack commands require a project alias, and fail with the following error
if the project alias is incorrect or missing from the command:
```plaintext
GitLab error: project or alias not found
```
## Usage
After confirming the installation, you, and everyone else in your Slack team,
can use all the [slash commands](../../../integration/slash_commands.md).
When you perform your first slash command you will be asked to authorize your
Slack user on GitLab.com.
The only difference with the [manually configurable Slack slash commands](slack_slash_commands.md)
is that all the commands should be prefixed with the `/gitlab` keyword.
We are working on making this configurable in the future.
For example, to show the issue number `1001` under the `gitlab-org/gitlab`
project, you would do:
```plaintext
/gitlab gitlab-org/gitlab issue show 1001
```
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