A simple, open, server-to-server web-hook-based pubsub (publish/subscribe) protocol as an extension to Atom and RSS. Parties (servers) speaking the PubSubHubbub protocol can get near-instant notifications (via webhook callbacks) when a topic (feed URL) they're interested in is updated. The protocol in a nutshell is as follows: An feed URL (a "topic") declares its Hub server(s) in its Atom or RSS XML file, via <link rel="hub" ...> .
Building and Using an RSS Feed by Denis Sureau What is RSS?
The tool below will help you format a feed's display with the information you want to use on your web site. All you need to enter is the URL for the RSS source, and select the desired options below. This service is not guaranteed and is likely to go away.