I have already gotten the accessories and the classic clothing to show up in the item list, but for bundles, it's not going well.
For things like UCG heads, I could get the asset into the list, but the player couldn't purchase it because it's only a part of the bundle. To solve this I used the catalog.roblox.com/v1/assets/{AssetId}/bundles endpoint via proxy, but when I build the thumbnail url using rbxthumb://type=Asset&id={AssetId}&w=420&h=420, the image is not visible.
Furthermore, I can't make bulk purchases because the bundle id keeps showing up as 0 and I don't know why. Even without bundles, I always get an Http 400 (Bad Gateway Message) when I try to prompt.
I started this project because I didn't want to just copy and paste from the yt video and learn by myself. But I'm really stuck lol.
I only have two scripts. I'm going to paste the down below.