Basic crud operations possible?

Maybe i am over expecting grav or I am blind, Is there any tutorial or documentation where CRUD operations are explained in grav

Hi Amod what's your use case? There's no REST API plugin for Grav at the moment, it would be interesting to hear what you would use it for.

Nothing extra ordinary. I just have a form in contact us. Filled data should not be emailed. this has to be saved in and viewed from the admin panel

This is handled by plugins. With the release of the admin plugin, there is a form plugin that can perform this (with the help of email plugin), but I've just not really built out the front-end site yet. It is partly there, but mostly to support the admin plugin.