Cross-Origin Resource Sharing (CORS) allows UI integrations to make API requests from external domains directly from the UI and allows web-based integrations to make requests directly to the Fotoware API from JavaScript code within a website without using the back end. 

CORS is disabled by default. 

To enable CORS: 

1. From the Tools menu (cogwheel icon), go to Site Configuration > Integrations > Applications.
2. Select Add application.
3. In the Cross-Origin Resource Sharing (CORS) section, turn on the Enable CORS toggle.
4. Select Add. 
   
5. Enter the name of the external site, for example, https://api.fotoware.com. 
6. Select Save. The changes are not immediate; it takes approximately 10 minutes for the external site to be added to your Fotoware site.
7. If you need to delete an external site after saving, select Delete for the relevant site.

Tip: If you specified redirect URIs when registering a UI application before enabling CORS, these URIs are automatically added to CORS when it is enabled.