Domains

An app answers on two kinds of hostname, and both are managed here. The platform subdomain is the built-in address, my-app.madewithremy.com: get reads the current one, check tests whether a name is free, and set claims it. Custom hostnames are domains a customer owns and points at the app: custom add registers one and returns the DNS records to create, an apex auto-pairing its www, while custom list, custom records, and custom status read back the set, the records still needed, and where each stands in verification and SSL issuance.

The status comes from a Cloudflare-synced cache that can lag a few minutes, so custom retry forces a synchronous re-check once the customer has fixed their DNS. custom remove takes a hostname down, an apex removing its paired www with it.