Counter.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Controller;
 
use Bitrix\Im\V2\Message\CounterService;
 
class Counter extends BaseController
{
    public function getAction(): ?array
    {
        $counters = (new CounterService())->get();
 
        return $this->convertKeysToCamelCase($counters);
    }
}