# Public / webhook URLs

When your End Users create Solution Instances, the Workflow Instances found within will have automatically-generated public urls

When your End Users create Solution Instances, the Workflow Instances found within will have automatically-generated public urls.
These are needed for any external services which are configured to communicate with these Workflow Instances via webhook.

**In the US region** the standard format for a webhook url is:
<https://fc2e17f9-xxxx-xxxx-xxxx-537f62e78c57.trayapp.io>

If you wish to remove the trayapp.io suffix it is possible to use the de-branded \*.integration-hook.com suffix instead.

**In the EU region** the standard format for a webhook url is:
<https://fc2e17f9-xxxx-xxxx-xxxx-537f62e78c57.eu1.trayapp.io>

If you wish to remove the eu1.trayapp.io suffix it is possible to use the de-branded \*.eu1.integration-hook.com suffix instead.

To do this go to Settings & people > Embedded settings:
![embedded-settings](https://tray.ai/documentation/images/platform/embedded/advanced-features/whitelabelling/public-urls/e98057a8-d12b399f_CSS%20and%20Whitelabelling-Public%20_%20webhook%20URLs.png)
You can then confirm before you are allocated an integration hook url:
![integration-hook-dialog](https://tray.ai/documentation/images/platform/embedded/advanced-features/whitelabelling/public-urls/e98057a8-8b5bd261_integrationHook2.png)