There's two new endpoints introduced: /wp_template and /wp_registered_template. The "old" templates endpoint is /templates so that's already taken. These new rest bases don't really fit other rest bases (underscore instead of dash), so I wonder if we should rename them. /wp_template is linked to the wp_template post type, and the convention is to do something like /templates (plural), but that's already taken. Perhaps the next best thing is to use /created-templates? And for registered templates it could be /registered-templates? Cc @youknowriad @mcsf in case you have an opinion on this.