Empire Market is fine and most trendy Onion Network Marketplace at the time. Being this famous it faces the problem of endless Ddos attacks witch leads main Empire Market URL to be down, and alternative mirror too. That means that empire marketplace had to design a lot of URL and onion links and links. And the problem is that there is not many ways users can discover a active Empire Marketplace links.
So that's why Empire Marketplace decided to create an original site where their users can at any time discover active URLs and onion mirrors, for instant access to Empire Market. Here it is http://empiremarketurl.com make sure you using whenever you you have to enter to darknet market empire market.