ZCML File
configure.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:xmlrpc="http://namespaces.zope.org/xmlrpc"
    i18n_domain="zope"
    >
<xmlrpc:view
    for="zope.interface.Interface"
    methods="listMethods methodHelp methodSignature"
    class=".xmlrpcintrospection.XMLRPCIntrospection"
    permission="zope.Public"
    />
</configure>