Skip to main content
A custom domain points your own address — like yourbrand.com — at a site you’ve published with Mythos, instead of the default your-name.r21.dev subdomain. This page describes the capability and where it stands today.
Status: coming soon. Custom domains are not available yet. In the Publish panel you’ll see an Add custom domain option marked Soon — it’s a placeholder for this feature, not a working flow. Published sites currently live on *.r21.dev.

​
What you can do today

Every published site gets a your-name.r21.dev address that you fully control:
  • Choose the subdomain — the your-name part is yours to pick on the publish URL step.
  • Rename it anytime — change the subdomain whenever you like; the new address is live within seconds.
For now, that subdomain is the public address for your site. See Publish your site for how to set and change it.

​
When the feature ships

A custom domain will let you serve a published site from yourbrand.com instead of the shared *.r21.dev subdomain, keeping one stable address independent of the underlying host. There’s no firm date yet; this page will be updated when it lands.

​
Limitations & good to know

  • Not available yet. The Add custom domain option in the Publish panel is a labeled placeholder (“Soon”); selecting it does not start a domain setup.
  • Use the *.r21.dev subdomain in the meantime. It’s a real, shareable, public URL — pick a clean subdomain and share that.

​
FAQ

Not yet. Custom domains are marked “Soon” in the Publish panel. For now, every published site uses a your-name.r21.dev subdomain that you choose and can rename.
The subdomain is the your-name part of your-name.r21.dev — yours to pick, but on the shared r21.dev host. A custom domain is your own address, like yourbrand.com, which isn’t supported yet.
A custom domain normally involves pointing your domain’s DNS at the host. The exact records and steps for Mythos aren’t published yet because the feature isn’t live. This page will be updated when it ships.