The site of Google Custom Search Objective-C library offers a library and a framework to access the JSON APIs. It aims to be flexible to work with Google APIs for iOS and Mac OS X apps. It is compatible with iOS3+ and Mac OS X 10.5+. Available example applications, support, and contributions.
The Tapir API is really 3: Search, Ping and Post to give you the power to make your blog searchable, get your articles indexed immediately, and push content manually. Indexing of the Rss feed is done at 15 minute intervals. According to the API documentation, the results are returned in JSON or JSONP.
Who ever said that institutions were loathe to change? Well call him up and let him know, the Library of Congress, with their Prints and Photographs API has finally taken the REST API plunge. If this government institution can do it, maybe you can convince the head of your IT department that APIs are a good idea too.