To start selling domain names, you must first make sure that the domain name product group feature is enabled. First of all, check if the "Domain Name Service" product group under the "Admin Area > Settings > General Settings > Advanced" path is active. If it is active, you can continue.
In order for domain extensions to be automatically activated via the API and all other transactions to be processed automatically, you need to work with a domain name registrar. You can reach the supported domain registrars on apps.wisecp.com/en?view=domains
If you work with a domain name registrar, operations such as "Domain Name Registration / Whois Update / Whois Protection / DNS Update / Name Server Creation" are done automatically through the API.
Reminder: In order for domain name orders to be registered smoothly by the registrar, you must make sure that you have an appropriate credit in your domain name registrar customer panel and that there is no API connection problem.