Unexpected HTTP status code 403 - new commands catalog

As part of this snap install an api call fails with a 403 returned - https://api.snapcraft.io/api/v1/snaps/names?confinement=strict%2Cclassic
Successfully installed snap on like servers earlier today.
System is Fedora 31 using dnf to install app.

are you actually getting a failure arising from this? the catalog refresh will typically try again later

Some parts of the store throw a 403 instead of a 429, for historical reasons

Yes - the /var/lib/snapd/snap directory was not populated with file/dirs other than the README file.
However, it started working properly without the 403 response 5 minutes ago.