Ability to check version being served by server before downloading

We are a MSP looking at removing admin permissions from the end users pc's which means I need to push the installer to users pc's to get SC installed and or updated. I am looking for either a file on the server or a header on the file download indicating the file version so that I do not have to download the installer just to check if the version being offered is the one that is already installed on a given PC.

These are not access sessions and we do not use access sessions through our client support instance.