You can use Stackfield's incoming webhook to send notifications to a Stackfield roms from WHMCS notifications.

1. Navigate to the Room Settings.
2. Click Integrations tab.
3. Click Add a new WebHook.
4. Choose Chat Message then click Create Webhook.
5. Give the webhook a name and an icon that will be used to post messages in Flock.
6. Click Save and Generate URL. Copy the URL that is generated.