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WebSub
A WebSub plugin for WordPress that enables real-time publishing and subscription capabilities.
The facts
- Rating
- 5★ from 6
- Active installs
- 100k+
- Price
- Free
- Last updated
- 21 Aug 2026
- Added
- May 2009
- Requires WP
- 4.5
- Tested up to
- WP 7.1
- Requires PHP
- 7.4
- Downloads
- 2,148,303
Our analysis
AI-assistedWebSub is a WordPress plugin that implements the WebSub protocol, previously known as PubSubHubbub. It enables real-time notifications for updates to your blog, notifying subscribers immediately when new content is published or existing content is updated. The plugin also provides a subscriber API for other plugins to access WebSub-enabled feeds.
This plugin is suitable for WordPress users who want to enhance their site's interactivity by allowing real-time updates to be sent to subscribers. It supports multi-user installations and various feed formats, making it versatile for different blogging scenarios.
Best for: This plugin suits WordPress users looking to implement real-time notifications for their blog updates.
What it does well
- ✓Sends real-time notifications for blog updates
- ✓Supports multiple hubs and feed formats
- ✓Provides a subscriber API for integration with other plugins
- ✓Compatible with multi-user installations
- ✓Includes full lifecycle hooks for developers
Where it falls short
- •Limited information on additional features or support
- •No details on user interface or ease of use
Verdict
WebSub is a functional plugin for enhancing blog interactivity through real-time updates. It is particularly useful for users who require a subscriber API for their feeds.
From the developer
joshfraz's own description of WebSub, lightly tidied.
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.
Tagged as
industry
Bookstore & Publishing
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