I cannot see the option to create a web service provider or consumer in Notes 8.5.3
I can goto the "Code" options menu in designer, but i do not see the option "Web Service Providers".
Any ideas ? I find this very weird, I did a reinstall and still nothing !
Some other perspectives remove the webservices from the outline (eg. XPages). Go to "Window -> Open Perspective -> Domino Designer".
If that doesn't bring it back, try doing a reset perspective.