You found the WebMethods page for your site, which is [yourdomain]//webservices/webmethods.asmx. You want to know if it's possible to hide this page from view.
This page is an environmental page for NetCommunity, which is public by default. There is not a supported way to hide this page. It is a secure page. Unauthenticated, public users will not be able to perform any of the functions listed within the WebMethods page.