Last modified: 2013-10-10 20:30:03 UTC
Well, there is an API - a renderer can be called to fetch the data from a wiki and generate the file, it is just not an MediaWiki-style API.
where is the API documentation ?
See http://pediapress.com/code/ and http://mwlib.readthedocs.org/en/latest/index.html as well as the source code of the extension, currently hosted at https://git.wikimedia.org/summary/mediawiki%2Fextensions%2FCollection