I can’t really understand why Rainmeter doesn’t have proper JSON parsing, but alas.
The WebParser seems to just run regexes through a text document, so you can just as well try to parse the API.
Some topics on using JSON in Rainmeter: http://rainmeter.net/forum/viewtopic.php?f=5&t=18338 http://rainmeter.net/forum/viewtopic.php?p=78503