Domainee is a custom domains API that lets SaaS products offer white-label domains to their users in minutes instead of months - and even sell domains directly inside their app. Connecting a domain takes a single CNAME record, with SSL certificates, renewals, and DNS verification handled automatically, while the Buy-a-Domain API turns domain registration into one API call. The first 50 domains and 100 GB of bandwidth are free forever, with no credit card required.