This extension provides a skin that is not designed to be used from a web browser, rather for consumption from another type of client... smartphone app, dynamic javascript page, automated bot. This is most of the same data that can be found in the default "Seasons" report's rss.xml output, but formatted in the JSON format for easier consumption by clients.

Creates a file /weewx.json in the WeeWX webroot. You won't see a reference to it if you look at the HTML of the generated reports.