Call the Install App method to add apps to your headless project from code. This is especially useful for AI agents that set up projects, and for scripting project setup, provisioning multiple projects, or building your own automation.
To add apps from the dashboard, see Add Apps to a Project.
Important: Only Wix users and API key admins can call the App Installation API. Unlike most admin API calls, it doesn't accept access tokens generated with client credentials. To call it from your own code, use an API key.
To call the method, you need:
Call Install App with your project's site ID as the tenant and the ID of the app to install:
The response confirms the installation and includes the ID of the new app instance:
If the app depends on other apps, Wix installs them as well and lists them in dependenciesInstallation.
Once you install an app, its APIs are available on your project. To remove an app, call Uninstall App with the same tenant and app ID.
To list the apps on your project, call Get Installed Apps:
The response lists an app instance for each installed app. You can also see your installed apps in the project dashboard under Apps > Manage Apps.
Last updated: 22 July 2026