***

title: Webhook
'og:site\_name': Unleash Documentation
'og:title': Webhook
max-toc-depth: 2
slug: integrate/webhook
-----------------------

<Button small outlined href="/support/availability">
  v3.11
</Button>

The Webhook Integration introduces a generic way to post messages from Unleash to third party services. Unleash allows you to define a webhook which listens for changes in Unleash and posts them to third party services.

The webhook will perform a single retry if the HTTP POST call fails (either a 50x or network error). Duplicate events may happen, and you should never assume events always comes in order.

## Configuration

#### Events

You can choose to trigger updates for the following events (we might add more event types in the future):

* feature-created
* 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-completed
* feature-environment-enabled
* feature-environment-disabled
* feature-variants-updated
* feature-tagged
* feature-untagged
* change-request-created
* change-request-discarded
* change-added
* change-discarded
* change-request-approved
* change-request-approval-added
* change-request-cancelled
* change-request-sent-to-review
* change-request-applied
* change-request-scheduled
* change-request-scheduled-application-success
* change-request-scheduled-application-failure
* change-request-schedule-suspended
* feature-potentially-stale-on
* feature-updated (deprecated in v4.3)

#### Parameters

Unleash Webhook integration takes the following parameters.

**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 the channel you want to post to.

**Content-Type** Used to set the content-type header used when unleash performs an HTTP POST to the defined endpoint.

**Body template** Used to override the body template used by Unleash when performing the HTTP POST. You may format you message using a [Mustache template](https://mustache.github.io). You will have the Unleash event format available in the rendering context:

<EndpointRequestSnippet endpoint="GET /api/admin/events" />

Example:

```mustache
{
  "event": "{{event.type}}",
  "createdBy": "{{event.createdBy}}",
  "featureToggle": "{{event.data.name}}",
  "timestamp": "{{event.data.createdAt}}"
}
```

If you don't specify anything Unleash will use the Unleash event format:

<EndpointRequestSnippet endpoint="GET /api/admin/events" />

#### Custom SSL certificates

If your webhook endpoint uses a custom SSL certificate,
you will need to start Unleash with the `NODE_EXTRA_CA_CERTS` environment variable set.
It needs to point to your custom certificate file in pem format.

For more information, see the [official Node.js documentation on setting extra certificate files](https://nodejs.org/api/cli.html#node_extra_ca_certsfile).