Empire Market is huge and most popular Onion Net Market at the time. Being this great has it's consequences regular Ddos attack witch leads primary Empire Market link to be down, and alternative mirrors as well. That lead to empire market had to design more and more URL and tor mirrors and mirror. And the thing is that there is not many ways costumers can get a fresh Empire Market URl.
So that's why Empire Marketplace decided to create an official webpage where their users can at any time find working URLs and onion mirrors, for quick access to Empire Market. Here it is http://empiremarketurl.com be sure to use it every time you you have to login to darknet market empire market.