Invocation of bin/wsprovide.sh without any parameter produces this help message:

[root@dev131 jbossas]# bin/wsprovide.sh 
Error: endpoint implementation was not specified!
WSProvideTask generates portable JAX-WS artifacts for an endpoint implementation.

usage: WSProvide [options] <endpoint class name>

options: 
    -h, --help                  Show this help message
    -k, --keep                  Keep/Generate Java source
    -w, --wsdl                  Enable WSDL file generation
    -a, --address=<address>     The generated port soap:address in wsdl
    -c, --classpath=<path>      The classpath that contains the endpoint
    -o, --output=<directory>    The directory to put generated artifacts
    -r, --resource=<directory>  The directory to put resource artifacts
    -s, --source=<directory>    The directory to put Java source
    -e, --extension             Enable SOAP 1.2 binding extension
    -q, --quiet                 Be somewhat more quiet
    -t, --show-traces           Show full exception stack traces
    -l, --load-provider         Load the provider and exit (debug utility)
[root@dev131 jbossas]#

Problematic part is 'usage: ...', there should be sth like (remove upper-letters):
"usage: wsprovide [options] <wsdl-url>"

Or better there should be wsprovide.sh for UNIX-like shells and wsprovide.bat for Windows-like, but I'm not sure if it is possible there.