# File lib/oauth/controllers/provider_controller.rb, line 86
      def capabilities
        if current_token.respond_to?(:capabilities)
          @capabilities=current_token.capabilities
        else
          @capabilities={:invalidate=>url_for(:action=>:invalidate)}
        end

        respond_to do |format|
          format.json {render :json=>@capabilities}
          format.xml {render :xml=>@capabilities}
        end
      end