Ability to distinguish server OpenERP/Odoo version

Question

I'm developing mobile app that has to be able work with either 7 and 8 version protocols through raw json rpc requests. And after few hours of searches I'm still curious, how to determine which version of OpenERP/Odoo server uses? Any ideas or may be here exists some specific request to know server build info.

Thanks in advance.

Update Thanks to @Mischievous 's answer. It gave me a point. So, my solution is request like that your.server.url/web/webclient/version_info

Answer 1

Yes, you can find the server info from here. Take look at screen-shot.

Just click on the "About Odoo"