Poetic Coding

Private Feed Key adds a 32bit (or 40bit) key for each of your users, creating a unique feed url for every registered user on the site. This allows you to restrict access to your feeds, to registered users only. The plugin will also work with plugins that filter access to posts to certain user levels, only allowing the user to see that content .

Private Feed Key

Private Feed Key adds a 32bit (or 40bit) key for each of your users, creating a unique feed url for every registered user on the site.

David Shanske

Daniel Jalkut (Red Sweater)

mantonr

Adds a JSON Feed to your WordPress site by adding <code>/feed/json</code> to any URL.
The JSON Feed format is a pragmatic syndication format, like RSS and Atom, but with one big difference: it’s JSON instead of XML. Learn more at <a href="http://jsonfeed.org/" rel="nofollow ugc">jsonfeed.org</a>.

JSON Feed (jsonfeed.org)

This plugin is simple to install, adds no weight to your site, and does what it says on the tin.

Private Feed Key vs JSON Feed (jsonfeed.org)