Does anyone know where to get the Mac App Store Search API? I already know this site → http://www.apple.com/itunes/affiliates/resources/documentation/itunes-store-web-service-search-api.html , and there is a great API for searching in the iOS App Store there. Search results are returned in JSON format.
But where to do it for the Mac App Store?
This API will do everything you need - try executing the request using the macSoftware object.
macSoftware
Here is an example that Sparrow requests (email client):
http://itunes.apple.com/search?entity=macSoftware&term=Sparrow