How to setup a custom domain for URL Canary
Coming soon: a user interface to manage custom domains.
Every canary works on every domain. The domain you select when creating a canary is just a convenient way for you to see what is available.
To use a canary on a custom domain, set an A record for your domain pointing at 18.104.22.168, and once your DNS configuration is propagated you can use it straight away with no extra setup required for non-https URLs only. If you want to use https on your custom domain canaries, please get in touch and I'll set it up manually.
If you have any other questions about how custom domains work, or you want me to manage your domain for you, please just ask.