gistfile1.txt

// framework.yaml
parameters:
    router.request_context.host: test.host #you can also use %env(HOST) and then set the HOST variable in your .env file
    router.request_context.scheme: http
    router.request_context.base_url: /api/ep
    router.request_context.port: 49100

framework:
...

// MyCommand.php
namespace App\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Command\LockableTrait;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Routing\RouterInterface;

class MyCommand extends Command
{
    use LockableTrait;

    private $router;

    // the name of the command (the part after "bin/console")
    protected static $defaultName = 'app:deliver';

    public function __construct(RouterInterface $router)
    {
        parent::__construct();
        $this->router = $router;
    }

    protected function configure()
    {
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
          
            $url = $this->router->generate('ep', ['MessageId' => ['message']], UrlGeneratorInterface::ABSOLUTE_URL);
            dump($url); //route not found for me, I would guess you set 'ep' as a correct route in the routes.yaml or in @Route
            return Command::SUCCESS;

            // or return this if some error happened during the execution
            // (it's equivalent to returning int(1))
            // return Command::FAILURE;
        }
}