randomuser.me has been under a DDoS attack for the last couple of days. We will be upgrading our infrastructure in the coming weeks to better handle attacks and accommodate the increased load we've been seeing from legitimate users.
It's been a while, but the Random User Generator API 1.2 update is ready! Randomuser.me will be down around 10 pm Central Time and should be back up within the hour if everything goes according to plan.