Serve from a custom domain

Add, verify, and remove one Pro custom domain per app.

Custom domains are Pro, one per app, and owner-only. The proxy routes the hostname to the app with the same visibility, gates, and moderation as <slug>.outer.now.

Point DNS at Outer

1. Run add_domain {app, hostname} and copy the returned DNS records.
2. Create CNAME <hostname> → domains.outer.now at your DNS provider.
3. Create the returned TXT ownership and certificate records exactly as shown.
4. Poll list_domains until hostname and certificate both read active.
5. Fix DNS and refresh when status reads failed with a reason.

Keep ownership rules straight

1. Manage domains as the app owner only, via add_domain, list_domains, remove_domain.
2. Expect downgrading to Free or deleting the app to remove the domain.
3. Keep the domain across renames; the binding follows the app, not the slug.

For the person-side walkthrough, see Use a custom domain.