TorDex search has a couple mirror addresses you may use in case the main onion does not load. Please only use the addresses on this page to access TorDex as there are many phishing clones.
TorDex main onion
tordexu73joywapk2txdr54jed4imqledpcvcuf75qsas2gwdgksvnyd.onion
TorDex mirror 1
tordexkue7sggxtul2uqwewqiulmgra4ucnmvdfhhfhuzat4l3cofzyd.onion
TorDex mirror 2
tordexyb63aknnvuzyqabeqx6l7zdiesfos22nisv6zbj6c6o3h6ijyd.onion
TorDex mirror 3
tordexpmg4xy32rfp4ovnz7zq5ujoejwq2u26uxxtkscgo5u3losmeid.onion