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---
stage: Ecosystem
group: Integrations
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
---
# Mattermost notifications service **(FREE)**
Use the Mattermost notifications service to send notifications for GitLab events
(for example, `issue created`) to Mattermost. You must configure both [Mattermost](#configure-mattermost-to-receive-gitlab-notifications)
and [GitLab](#configure-gitlab-to-send-notifications-to-mattermost).
You can also use [Mattermost slash commands](mattermost_slash_commands.md) to control
GitLab inside Mattermost.
## Configure Mattermost to receive GitLab notifications
To use the Mattermost integration you must create an incoming webhook integration
in Mattermost:
1. Sign in to your Mattermost instance.
1. [Enable incoming webhooks](https://docs.mattermost.com/developer/webhooks-incoming.html#enabling-incoming-webhooks).
1. [Add an incoming webhook](https://docs.mattermost.com/developer/webhooks-incoming.html#creating-integrations-using-incoming-webhooks).
1. Choose a display name, description and channel, those can be overridden on GitLab.
1. Save it and copy the **Webhook URL** because we need this later for GitLab.
Incoming Webhooks might be blocked on your Mattermost instance. Ask your Mattermost administrator
to enable it on:
- **Mattermost System Console > Integrations > Integration Management** in Mattermost
versions 5.12 and later.
- **Mattermost System Console > Integrations > Custom Integrations** in Mattermost
versions 5.11 and earlier.
Display name override is not enabled by default, you need to ask your administrator to enable it on that same section.
## Configure GitLab to send notifications to Mattermost
After the Mattermost instance has an incoming webhook set up, you can set up GitLab
to send the notifications.
Navigate to the [Integrations page](overview.md#accessing-integrations)
and select the **Mattermost notifications** service. Select the GitLab events
you want to generate notifications for.
For each event you select, input the Mattermost channel you want to receive the
notification. You do not need to add the hash sign (`#`).
Then fill in the integration configuration:
- **Webhook**: The incoming webhook URL on Mattermost, similar to
`http://mattermost.example/hooks/5xo…`.
- **Username**: (Optional) The username shown in messages sent to Mattermost.
To change the bot's username, provide a value.
- **Notify only broken pipelines**: If you enable the **Pipeline** event, and you want
notifications about failed pipelines only.
- **Branches to be notified**: The branches to send notifications for.
- **Labels to be notified**: (Optional) Labels required for the issue or merge request
to trigger a notification. Leave blank to notify for all issues and merge requests.
- **Labels to be notified behavior**: When you use the **Labels to be notified** filter,
messages are sent when an issue or merge request contains _any_ of the labels specified
in the filter. You can also choose to trigger messages only when the issue or merge request
contains _all_ the labels defined in the filter.
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