A year ago, I registered the domain catholiccrossreference.com after my previous web site suffered a meltdown. This domain became the new home of my Catechism search engine (among other things).
Today, I am announcing the release of a Catechism API (still in beta). There is no documentation written for it yet, although the field names (and their values) are pretty straight-forward.
This API allows you to request information about the sections of the Catechism and to search the text of the Catechism by word or Scripture reference. In the near future, there will be both documentation and a sample display of how to render the JSON results in HTML.
There are 25 beta accounts available… probably highly optimistic on my part.