Originally Posted by
Zorak
You can still register/add cards and view them, just that the URL has changed:
https://gifts.marriott.com/
I discovered this semi-randomly when trying to login the other day to use a gift card (I usually keep a paper version with me but didn't have it on hand when I wanted to use it) and my bookmarked givex.whatever link didn't work. (I see now it's in the wiki too since at least May but I haven't tried to login in a long time)
My previous GiveX login credentials worked even on the new URL and all my previous registered cards were still visible with the correct balances (easy to tell because they're all $0 except for one card

)
Add To Apple* Wallet is still missing from that URL. Unless it's available for some accounts and not others...
The only options I have for my "added" cards are:
1. > Report Lost
2. > Delete Card