Hey Thomas! We don’t guarantee that IP addresses will remain stable, but having said that, the IPv4 address for api.prefect.cloud (34.111.36.90) has remained the same since July 22nd, 2022 and the IPv6 address (2600:1901:0:3486::) has remained fixed since August 11th, 2022. We’re going to add these to our status page, and we will provide as much advance warning as we can via that page when we change these addresses.