You cannot access these without a specific Discord invite. Searching for "Bloxd.io X-Ray Discord" will lead to private servers that cycle invites weekly.
Mine at deep Y-levels in a straight line with two blocks of space between tunnels. bloxd io x ray texture pack url download link
Go to the Chrome Web Store and add the Tampermonkey extension to your browser. This allows you to run custom JavaScript on the Bloxd.io website. You cannot access these without a specific Discord invite
If you are specifically looking for an "X-Ray" pack to find diamonds or ores easily, please be aware of the risks: Go to the Chrome Web Store and add
If you simply want to build without the grind, switch to Creative Mode or a Creative server. You will have instant access to all blocks, removing the need for an X-Ray pack entirely.
Note: Actual working repositories are taken down frequently due to DMCA requests from the Bloxd.io developers.