emails/api/resources/routes/02_messages.php

<?php
use ProVM\Common\Controller\Messages;
use ProVM\Common\Controller\Jobs;

$app->group('/messages', function($app) {
    $app->put('/grab', [Messages::class, 'grab']);
    $app->put('/schedule', [Jobs::class, 'schedule']);
    $app->get('/pending', [Jobs::class, 'pending']);
});
$app->group('/message/{message_id}', function($app) {
    $app->get('[/]', [Messages::class, 'get']);
});