Yes, there is such method.

%CSP.Request has method "GetCgiEnv" that you can use like this:

ClassMethod YourMethod(request As%CSP.Request) As%Status

{

        Set userAgent = request.GetCgiEnv("HTTP_USER_AGENT")

        Set IPAddress = request.GetCgiEnv("REMOTE_ADDR")

        Set messageFormat= request.GetCgiEnv("CONTENT_TYPE")

       return$$$OK

}

All possible data that you can get from GetCgiEnv you can look here: Cgi Data