Actually, there’s another way around. You can still use datasets and write a back-end module that exposes a public API for your site. So you can consume the API using a CLI client. See wix-http-functions - Velo API Reference - Wix.com.
But then you need to think of security measures. Obviously, the API shouldn’t grant unlimited access to every called. So you’ll need to think of an authorization mechanism, maybe some simple password system to start with.