Can i use SCALE transform with HTTP binding and GET method?

I try to send to controller this command:

Dimmer	Light_Room2_DIM	"Room wall [%.0f %%]"	<slider>	{ http=">[*:GET:$s]" }

Controller can receive only GET requests.
I need to convert %2$s using SCALE transformation. Is it possible?

You can apply a transform to the result returned by the GET. You cannot apply a transform to the current state of the Item in making the request. I can’t think of a way to solve this without using a proxy item.