The registry's RDAP service is available at https://rdap.nic.ht/. It lets you look up the public information of a registered name.
GET https://rdap.nic.ht/domain/example.com.ht
Accept: application/rdap+jsonA 404 response means the name is not registered. This site's search tool relies on this service and only shows availability.
Rate limits and detailed formats: to be confirmed by the technical team.