Same here, also had a lot of builds fail because Xcode Cloud encountered HTTP 403 errors while downloading SPM dependencies. Apple Developer Service Status is all green, but I think they must be doing some background work, it should be back to normal soon.

Just chiming in to say this issue has not occurred for the last days / weeks, so it would seem that Apple resolved it. Fingers crossed for now, hope it's the same for you all.

Thank you for your replies, that's a bit reassuring to read that my project isn't the only one affected by this issue even though I'm sorry for you lads. I'm guessing we're probably due for a minor Xcode update to fix this ? I'm on my way to reinstall 13.1 and I'd advise you to do the same for the time being. Hope they'll get it fixed soon !