What it is: Web feeds (RSS and Atom) are machine-readable summaries of a website’s latest content, designed so any software can subscribe to updates without scraping the site.
Who it’s for: Anyone who wants to follow many sites without algorithms picking what they see, plus developers building AI agents that need fresh content sources
Best if: You’re tired of social-feed gatekeepers and want a quieter information layer
Skip if: You already curate dozens of feeds in NetNewsWire or Feedly
What Are Web Feeds (RSS and Atom)?
A web feed is a small XML file that a website publishes alongside its main HTML, listing recent posts in a structured form. Feed readers (Feedly, Inoreader, NetNewsWire, FreshRSS) check the file periodically, notice new entries, and show them to subscribers — no algorithm, no ads, no engagement bait. Two flavours dominate: RSS 2.0, the older format that became the de-facto standard in the 2000s, and Atom, the IETF-standardised replacement published in 2005 (RFC 4287).
Think of a feed like a deli’s printed daily menu posted in the window. Anyone walking by can read it without going inside, take a copy, or photograph it for a friend. The deli doesn’t know who’s reading. They just publish; the world subscribes. Web feeds are the same idea applied to blog posts, podcasts, newsletters, and increasingly to AI agents that need a clean source of fresh content.
Most major platforms still publish feeds whether or not they advertise the fact. WordPress sites expose both an RSS feed at /feed/ and an Atom feed at /feed/atom/. Substack and Beehiiv each publish a feed per publication. Even YouTube has per-channel RSS feeds buried in its plumbing. The feed layer is everywhere — most users just don’t see it.
Why It Matters
Feeds are the last big chunk of the open web that isn’t gatekept by an algorithm. Subscribing to a feed gives you everything the publisher posts, in order, with no inserted ads and no "recommended for you." In an era where most social platforms now decide what you see, that’s a meaningful piece of editorial control to take back. Independent writers and small publishers especially benefit because feed subscribers don’t churn the way social followers do — once someone subscribes to your feed, you reach them every time you publish.
Feeds also matter for AI. Many AI agents that "read the news" — including coding agents that track library releases, research agents that monitor preprints, and content-aggregation tools — consume RSS or Atom under the hood. Generative-engine optimisation (GEO) treats feeds as a first-class signal because they give AI crawlers a clean, dated, structured view of your fresh content without the noise of a full HTML scrape.
How It Works
A feed is just an XML document hosted at a public URL — typically /feed/, /feed.xml, or /atom.xml. Each entry inside it has a title, a publish date, a stable identifier, and either a short summary or the full post body. Feed readers store the URLs you’ve subscribed to, fetch each one every few minutes or hours, compare the entry IDs against what they’ve already shown you, and surface anything new. The whole system runs over plain HTTP with no accounts, no login, and no API key.
RSS 2.0 and Atom differ in technical detail but solve the same problem. Atom’s main advantages are explicit content-type declarations (each entry says whether its body is plain text, HTML, or XHTML), RFC 3339 timestamps (ISO-8601 dates instead of RSS’s older RFC 822 format), and URI-based entry IDs that guarantee global uniqueness. RSS 2.0 is simpler, older, and has the larger installed base. Most modern readers handle both flawlessly, so the format you publish is mostly a matter of taste.
Examples
Find a feed: Most sites don’t show a visible RSS button anymore, but the feed is usually at /feed/ (WordPress), /feed (Substack), or in the page’s <head> as <link rel="alternate">. Paste the homepage URL into Feedly or Inoreader and most readers auto-discover the feed.
Subscribe to a podcast: Every podcast you listen to is, technically, an RSS feed with audio enclosures. Apple Podcasts, Spotify, and Pocket Casts are all RSS aggregators wearing different visual interfaces. The open podcast ecosystem still runs on RSS — that’s why no platform has been able to gatekeep it.
Feed an AI agent: An AI agent that needs fresh content (a daily news summariser, a release-notes watcher, a literature tracker) subscribes to a handful of RSS or Atom URLs, parses each, and ingests the new entries on a schedule. Stable, structured, polite to the server, and far cheaper than scraping.
Sources
• RFC 4287 — The Atom Syndication Format (IETF)
• RSS Advisory Board — RSS 2.0 specification
• Susam Pal — From RSS to Atom (2026)
Last reviewed: May 2026
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