Cover configuration with slider control for Shelly Roller without MQTT

I would like to configure a cover blinds for my shelly 2 in roller mode but without using MQTT as I would like to keep using the Cloud and so far, is no possible to do both things. I have managed to configure several blinds controls with Cover command line working 100% but I would like to add slider and verification of % of opening. I have reviewed Shelly API documentation and I couldn´t figure it out how to solve it. I try to search a lot in the forum but no success to find anything. Could anyone give me a hand?