% npm install node-xmpp
% vi config.js

% node channel-tool.js 
Usage: node .../channel-tool/channel-tool.js <create-node|subscribe-node|publish-item|retract-item|items|affiliations|subscriptions|subscribers|get-config|set-config|...> ...
% node channel-tool.js subscriptions
Usage: node /home/stephan/programming/channel-tool/channel-tool.js subscriptions <service>
% node channel-tool.js subscriptions channels.example.com
<iq from="channels.example.com" ...