Empire Market is famous and most popular Darknet Market at the time. Being this big has it's consequences constant Ddos attack witch leads main Empire Market URL to be down, and alternative mirrors as well. That means to empire marketplace need to create a lot of URL and tor links and mirror. And the thing is that there are not much ways costumers can get a active Empire Market link.
That's why Empire Marketplace decided to create an official website where their users can always discover working URLs and onion mirrors, for quick enter to Empire Market. Here it is http://empiremarket-url.com be sure to use it every time you you have to login to darknet market empire market.