I hope the assets and information are helpful to you.
There is just one more thing I would like to tell you: Over the last couple of months the companies contacting me regarding CC0 Textures have gotten bigger and bigger. This is not a problem in itself but I would like to make it clear that CC0 Textures is operated and and filled with content by just me (Lennart Demes) - a computer science student. It was built with hobbyists and educators in mind.
If I ever have to go to the hospital for a couple of weeks and something breaks then the API or website will stay broken for those weeks.
It is absolutely fine for even large companies to use the assets or the API. I just want everyone who is using CC0 Textures commercially to keep this in mind. If you want to be safe: Create your own local copy of the CC0 Textures library by signing up for a CC0 Textures Nextcloud account on Patreon