UptimeRobot combined with Clean and Lock Extension

My MainWP Dashboard is using the Clean and Lock extension to 301 redirect all regular traffic to my business site. But I realised that Uptime Monitor is redirected as well, so using that to make sure cron jobs will be fired isn’t working (I’ve checked that in the access log). So only when I’ve MainWP Dashboard open (during daytime), these jobs are running.

Is it possible to trigger cron jobs by changing the url UptimeRobot is monitoring? And what would be the best url? I don’t want to use the login url, because that would conflict with my firewall (brute force protection). Should I just use /wp-cron.php or is there a better option?