Some other endpoints on the org had failures overnight, I haven't run any tests yet.
I'll message you the org ID.
It's an EU hosted org.
Edit:
Currently, these three endpoints are failing every time I test...
getNetworkDevices
getNetworkClients
getOrganizationWirelessDevicesPacketLossByClient
...only on the affected org, the same scripts are running ok on other orgs.