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How to Get RSS Feeds for Twitter
Twitter is permanently retiring the Twitter API v1.0 sometime later this month and, to the end user, what it means is that all the existing Atom and RSS feeds of Twitter will stop working once the old API is turned off. With API v1.1, Twitter has completely switched from XML to JSON format and the other big change is that all requests to the Twitter API must now be authenticated with OAuth.
In simple English, you can no longer subscribe to any of the Twitter streams – be it search results, timelines of users, their favorites or even Twitter Lists – in your RSS Reader.
That said, there is any easy workaround.