~~Title: Custom application parameters~~
~~NOTRANS~~
~~NOPDF~~

It's possible to send additional properties from the app to the server-side application. This can be done with [[flutterui:startup_props|Start request]]. But it's also possible to send parameters from the server-side application to the app. This can be done directly in server-side application as usual with [[jvx:client:gui:application_parameters|JVx']].

Here's an example:

<code java>
getLauncher().setParameter(IMobileConstants.PREFIX_CLIENT + "apiKey", "12345");
</code>

The app will receive a specific response:

<code json>
{
  "name" : "applicationParameters",
  "apiKey" : "1234",
}
</code>

All custom properties are available in the app automatically.