To add custom API endpoint to UNA, please create an empty module first, I think it's better to rename modules/boonex/api module to your own and delete or replace existing endpoints with yours. 

To add custom endpoint - add service function, for example to add endpoint which get time you can add something like this:

public function serviceClock() 
{
    return ['time' => date('H:i:s')];
}

Then declare if you want to use this endpoint with authentication or not, for public endpoint add name of the endpoint to serviceGetPublicServices method:

public function serviceGetPublicServices()
{
    $a = parent::serviceGetPublicServices();
    return array_merge($a, array ('Clock' => ''));
}

for protected endpoint add it the same way but to serviceGetSafeServices method.

After above you will be able to call your custom endpoint with the following URL:

http://example.com/m/oauth2/com/clock?client_id=1234abcd&module=your_modulename

You will get response in JSON format

#tipsandtricks #api