How does Posts Table Pro work with the REST API?
Posts Table Pro displays content from standard WordPress post types (posts, pages, or any custom post types). It doesn’t create new database tables for your content; instead, it uses WordPress’s existing tables. (The plugin does store table configurations, layouts, settings, and options, in its own table, but this data isn’t exposed via the REST API).
Because the content itself is stored in WordPress’s native tables, it is fully accessible via the WordPress REST API.
If searching the knowledge base hasn't answered your question, please contact support.