Description
At a glance
WebSub (FKA. PubSubHubbub) v4.0.1 — free WordPress plugin download. Key facts: 100K+ active installs · 5/5 rating from 6 reviews · updated August 21, 2026 · requires WordPress 4.5+ & PHP 7.4+.
This plugin implements the WebSub protocol (formerly known as PubSubHubbub) for WordPress. It enables real-time notifications when your blog is updated and provides a subscriber API for other plugins to consume WebSub-enabled feeds.
Publisher Features
When you publish or update a post, this plugin automatically notifies WebSub hubs, which then distribute the update to all subscribers in real-time.
- Sends realtime notifications when you update your blog
- Supports multi-user installations (WordPress MU)
- Supports multiple hubs
- Supports all feed formats used by WordPress (Atom, RSS2, RDF)
- Adds
<link rel="hub">and<link rel="self">declarations to feeds and HTML
Subscriber Features
The plugin provides a subscriber API that allows other plugins (like feed readers) to subscribe to WebSub-enabled feeds using WordPress hooks.
- REST API callback endpoint for subscription verification and content delivery
- Hub discovery from topic URLs (HTTP Link headers and feed content)
- HMAC signature verification (SHA1, SHA256, SHA384, SHA512)
- Full lifecycle hooks for integration with other plugins
Supported Specifications
Default Hubs
By default this plugin will ping the following hubs:
Please contact us if you operate a hub that you would like to be included as a default option.
Frequently asked questions
What do I get when I download WebSub (FKA. PubSubHubbub)?
WebSub (FKA. PubSubHubbub) 4.0.1 is the latest version. It is a WordPress plugin you can download here free of charge under the GPL license, with the complete feature set included and no trial limitations. It holds a 5/5 rating from 6 user reviews.
Does WebSub (FKA. PubSubHubbub) cost anything?
No. WebSub (FKA. PubSubHubbub) 4.0.1 is 100% free — the full GPL version, not a trial or demo. There are no download limits, no accounts to create, and no upsells during the download.
How do I install WebSub (FKA. PubSubHubbub) 4.0.1?
Download the ZIP file from this page, then in your WordPress dashboard go to Plugins → Add New → Upload Plugin, choose the file, click Install Now, then Activate. The plugin works immediately after activation — no license key or extra setup is required for the core features.
What are the requirements for WebSub (FKA. PubSubHubbub)?
WebSub (FKA. PubSubHubbub) 4.0.1 requires WordPress 4.5 or higher and PHP 7.4 or higher. Most modern WordPress hosts already meet these versions. Running older versions may cause features to break, so update WordPress and PHP first if your site is behind.
When was WebSub (FKA. PubSubHubbub) last updated?
Version 4.0.1 was last updated on August 21, 2026. This page is refreshed automatically, so the download here always matches the newest version we have verified.
Is the WebSub (FKA. PubSubHubbub) download safe?
The file is sourced directly from the official WordPress.org repository — the same file the developer published. It is served unmodified, so what you install here is byte-identical to the official release.
Version: 4.0.1
Updated: October 1, 2026
Technical details
| Version | 4.0.1 |
|---|---|
| Last updated | August 21, 2026 |
| Active installs | 100,000+ |
| Rating | ★★★★★ 5/5 (6 reviews) |
| Requires WordPress | 4.5 or higher |
| Requires PHP | 7.4 or higher |
| Author | joshfraz |
| Tags | feed, indieweb, pubsub, pubsubhubbub, websub |
Demo WebSub (FKA. PubSubHubbub)
Download WebSub (FKA. PubSubHubbub)
Download WebSub (FKA. PubSubHubbub) WP PluginNote: if the download does not start, disable your ad blocker and try again.
