Do you want to know if your Access Point is vulnerable at the WPS protocol?
Wifi Wps Wpa Tester is the app that you need!
With this app, you can test the connection to AP with WPS PIN.

App needs root permissions for devices with Android version < 5.0 ( LOLLIPOP ).
For devices with Android >= 5.0 you can test the PINs with this app and you can connect, BUT YOU CANNOT SEE WPA ( OR WEP ) PASSWORD WITHOUT ROOT PERMISSIONS.