Matthias Pfefferle

André Menrath

<p>Make your events more discoverable, expand your reach effortlessly while being independent of other (commercial) platforms, and be a part of the growing decentralized web (the Fediverse). With the Event Bridge for ActivityPub Plugin for WordPress, your events can be automatically followed, aggregated and displayed across decentralized platforms like <a href="https://joinmastodon.org" rel="nofollow ugc">Mastodon</a> or <a href="https://gancio.org" rel="nofollow ugc">Gancio</a>, without any extra work. Forget the hassle of managing multiple social media accounts just to keep your audience informed.</p>
<p>This plugin is not an event managing plugin but an add-on to popular event plugins. It extends their functionality to fully support the <a href="https://wordpress.org/plugins/activitypub/" rel="ugc">ActivityPub plugin</a>. With the ActivityPub plugin people can follow your website directly and engage with your events just as they would on social media: liking, boosting and even commenting if you enable it. You retain full ownership of your content. By integrating into your existing setup, it ensures no extra work is needed while enhancing your events’ visibility across the web.</p>
<h4>Supported Event Plugins</h4>
<p>Full support (including importing events from the Fediverse):</p>
<ul>
<li><a href="https://de.wordpress.org/plugins/the-events-calendar/" rel="nofollow ugc">The Events Calendar</a></li>
<li><a href="https://de.wordpress.org/plugins/very-simple-event-list/" rel="nofollow ugc">VS Event List</a></li>
<li><a href="https://gatherpress.org/" rel="nofollow ugc">GatherPress</a></li>
</ul>
<p>Basic support (outgoing events):</p>
<ul>
<li><a href="https://de.wordpress.org/plugins/events-manager/" rel="nofollow ugc">Events Manager</a></li>
<li><a href="https://de.wordpress.org/plugins/wp-event-manager/" rel="nofollow ugc">WP Event Manager</a></li>
<li><a href="https://de.wordpress.org/plugins/wp-event-solution/" rel="nofollow ugc">Eventin</a></li>
<li><a href="https://webnus.net/modern-events-calendar/" rel="nofollow ugc">Modern Events Calendar Lite</a></li>
<li><a href="https://wordpress.org/plugins/event-organiser/" rel="ugc">Event Organiser</a></li>
<li><a href="https://wordpress.org/plugins/eventprime-event-calendar-management/" rel="ugc">EventPrime – Events Calendar, Bookings and Tickets</a></li>
<li><a href="https://wordpress.org/plugins/eventon-lite/" rel="ugc">EventON – Events Calendar</a></li>
</ul>
<h4>How It Works</h4>
<p>With the Event Bridge for ActivityPub WordPress plugin, sharing your events is effortless and automatic! Once you create an event on your WordPress site, it is seamlessly shared across the decentralized web using the ActivityPub protocol.</p>
<div class="embed-vimeo" style="text-align: center;"><iframe loading="lazy" src="https://player.vimeo.com/video/1043105544" width="750" height="422" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
<p>Your events can be automatically delivered to platforms that fully support events, such as <a href="https://joinmobilizon.org/" rel="nofollow ugc">Mobilizon</a>, <a href="https://gancio.org" rel="nofollow ugc">Gancio</a>, <a href="https://friendi.ca" rel="nofollow ugc">Friendica</a>, <a href="https://hubzilla.org" rel="nofollow ugc">Hubzilla</a>, and <a href="https://pleroma.social/" rel="nofollow ugc">Pleroma</a>. These platforms create public event calendars by pulling in events from various sources, including your website. Any updates you make to your events are synced across these platforms—so you only need to manage your events on your own site, with no extra work required.</p>
<div class="embed-vimeo" style="text-align: center;"><iframe loading="lazy" src="https://player.vimeo.com/video/1043104445" width="750" height="422" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
<p>Even platforms that don’t yet fully support events, like <a href="https://joinmastodon.org" rel="nofollow ugc">Mastodon</a>, will still receive a detailed, well-composed summary of your event. The Event Federation plugin ensures that users from those platforms are provided with all important information about an event.</p>
<h4>Features for Your WordPress Events and the Fediverse</h4>
<p><strong>ActivityPub-Enabled Event Sharing:</strong> Your WordPress events are now compatible with the Fediverse, using the ActivityStreams format. This means your events can be easily discovered and followed by users on platforms like Mastodon and other ActivityPub-compatible services.</p>
<p><strong>Automatic Event Summaries:</strong> When your event is shared on the Fediverse, platforms like Mastodon that don’t fully support events will display a brief HTML summary of key details — such as the event’s title, start time, and location. This ensures that even if someone can’t view the full event on their platform, they still get the important info at a glance, with a link to your WordPress event page. Advanced users can create custom summaries via a set of shortcodes.</p>
<p><strong>Improved Event Discoverability:</strong> Your custom event categories are mapped to a set of default categories used in the Fediverse, helping your events reach a wider audience. This improves the chances that users searching for similar events on other platforms will find yours.</p>
<p><strong>Event Reminders for Your Followers:</strong> Often, events are planned well in advance. To keep your followers informed right in time, you can set up reminders that are supposed to trigger the events showing up in their timelines right before the event starts.</p>
<p><strong>External Event Sources:</strong>  This functionality is only available for a subset of the supported event plugins. It enables your WordPress site to act as a hub for displaying events from other ActivityPub profiles, aggregating them into a cohesive calendar view.</p>
<h3>Acknowledgement</h3>
<p>The development of this WordPress plugin was funded through the <a href="https://NLnet.nl/entrust" rel="nofollow ugc">NGI0 Entrust</a> Fund, a fund established by <a href="https://nlnet.nl" rel="nofollow ugc">NLnet</a> with financial support from the European Commission’s <a href="https://ngi.eu" rel="nofollow ugc">Next Generation Internet</a> programme, under the aegis of <a href="https://commission.europa.eu/about-european-commission/departments-and-executive-agencies/communications-networks-content-and-technology_en" rel="nofollow ugc">Communications Networks, Content and Technology</a> under grant agreement number 101069594.</p>
<h3>Contributing</h3>
<p>This plugin is free software, and contributions of all kinds are welcome! Whether it’s reporting issues, submitting improvements, or suggesting new features, your input helps make the plugin better for everyone.</p>
<p>Please review our <a href="https://codeberg.org/Event-Federation/wordpress-event-bridge-for-activitypub/src/branch/main/CONTRIBUTING.md" rel="nofollow ugc">Contribution Guidelines</a> to get started. The source code is hosted on <a href="https://codeberg.org/Event-Federation/wordpress-event-bridge-for-activitypub" rel="nofollow ugc">Codeberg</a>, where you can open issues and submit pull requests.</p>
<p>Thank you for contributing!</p>


Event Bridge for ActivityPub


@andremenrath you did and do an awesome job bringing Events of a bunch of WordPress plugins to the fediverse! Keep up the good work 🎉


Awesome work!

Integrating popular event plugins with the ActivityPub plugin.

Brandon Kraft

<p>FediBoost extends the ActivityPub plugin by automatically boosting your WordPress posts on your connected Mastodon accounts when they are published.</p>
<p>When you publish a new post on your WordPress site, FediBoost will automatically boost (reblog) that post on your linked Mastodon account, helping increase visibility across the fediverse.</p>
<p><strong>Features:</strong></p>
<ul>
<li>Automatic boosting of new posts to connected Mastodon accounts</li>
<li>Seamless integration with the ActivityPub plugin</li>
<li>No additional configuration required after setup</li>
</ul>
<p><strong>Requirements:</strong></p>
<ul>
<li>The <a href="https://wordpress.org/plugins/activitypub/" rel="ugc">ActivityPub plugin</a> must be installed and configured</li>
<li>A connected Mastodon account via ActivityPub</li>
</ul>
<h3>Developer Hooks</h3>
<p>FediBoost provides several filters that allow developers to customize its behavior. All filters follow WordPress coding standards and can be added to your theme’s functions.php file or a custom plugin.</p>
<h4>fediboost_should_boost_post</h4>
<p>Control whether a specific post should be boosted. Return false to skip boosting for the given post. Default: true.</p>
<p><strong>Parameters:</strong></p>
<ul>
<li><code>$should_boost</code> (bool) — Whether the post should be boosted.</li>
<li><code>$post</code> (WP_Post) — The post object being published.</li>
</ul>
<p><strong>Example:</strong></p>
<pre><code>add_filter( 'fediboost_should_boost_post', function( $should_boost, $post ) {
    // Don't boost posts in the "internal" category.
    if ( has_category( 'internal', $post ) ) {
        return false;
    }
    return $should_boost;
}, 10, 2 );
</code></pre>
<h4>fediboost_boost_delay</h4>
<p>Delay in seconds after ActivityPub federation completes before the boost is executed. This delay is only used when the federation completion hook fires successfully. Default: 30.</p>
<p><strong>Parameters:</strong></p>
<ul>
<li><code>$delay</code> (int) — The delay in seconds.</li>
</ul>
<p><strong>Example:</strong></p>
<pre><code>add_filter( 'fediboost_boost_delay', function( $delay ) {
    // Wait 2 minutes after federation before boosting.
    return 120;
} );
</code></pre>
<h4>fediboost_fallback_delay</h4>
<p>Delay in seconds before a boost is executed when the ActivityPub federation completion hook does not fire. This acts as a safety net for older versions of the ActivityPub plugin that do not support the <code>activitypub_outbox_processing_complete</code> hook. If the federation hook fires first, the fallback is cancelled and <code>fediboost_boost_delay</code> is used instead. Default: 300 (5 minutes).</p>
<p><strong>Parameters:</strong></p>
<ul>
<li><code>$delay</code> (int) — The fallback delay in seconds.</li>
</ul>
<p><strong>Example:</strong></p>
<pre><code>add_filter( 'fediboost_fallback_delay', function( $delay ) {
    // Wait 10 minutes in the fallback path.
    return 600;
} );
</code></pre>
<h4>fediboost_manage_capability</h4>
<p>WordPress capability required to manage FediBoost settings. Default: ‘manage_options’. Note: a floor of ‘edit_others_posts’ is enforced regardless of this filter’s return value, so you cannot lower the requirement below that capability.</p>
<p><strong>Parameters:</strong></p>
<ul>
<li><code>$capability</code> (string) — The required capability.</li>
</ul>
<p><strong>Example:</strong></p>
<pre><code>add_filter( 'fediboost_manage_capability', function( $capability ) {
    // Allow editors to manage FediBoost settings.
    return 'edit_others_posts';
} );
</code></pre>
<h4>fediboost_max_accounts</h4>
<p>Maximum number of connected Mastodon accounts. Default: 10.</p>
<p><strong>Parameters:</strong></p>
<ul>
<li><code>$max</code> (int) — The maximum number of accounts.</li>
</ul>
<p><strong>Example:</strong></p>
<pre><code>add_filter( 'fediboost_max_accounts', function( $max ) {
    // Allow up to 25 connected accounts.
    return 25;
} );<h3>External Services</h3>
</code></pre>
<p>FediBoost connects to external Mastodon instances that you configure (e.g., mastodon.social). This communication is essential for the plugin to function and is initiated only with the instance you explicitly provide.</p>
<p><strong>During setup:</strong></p>
<ul>
<li>FediBoost registers an OAuth application on your Mastodon instance and performs an authorization flow so it can act on your behalf.</li>
</ul>
<p><strong>When a post is published:</strong></p>
<ul>
<li>FediBoost searches for the post on your Mastodon instance and performs a reblog (boost) via the Mastodon API.</li>
</ul>
<p><strong>Data sent to your Mastodon instance:</strong></p>
<ul>
<li>Your instance URL</li>
<li>OAuth authorization codes</li>
<li>Search queries to locate your posts</li>
<li>Reblog (boost) requests</li>
</ul>
<p><strong>Data stored locally on your WordPress site:</strong></p>
<ul>
<li>Encrypted OAuth tokens</li>
<li>Your Mastodon username</li>
<li>Your Mastodon instance URL</li>
</ul>
<p>Each Mastodon instance has its own privacy policy and terms of service. You can find a list of instances and their policies at <a href="https://joinmastodon.org/servers" rel="nofollow ugc">joinmastodon.org/servers</a>.</p>
<p>This plugin does not send data to any third-party service other than the Mastodon instance(s) you explicitly configure.</p>


FediBoost


This plugin solves a core frustration in the fediverse: Sites have their own identities, but most of us already have separate identities in the fediverse, too. FediBoost automatically boosts posts from your site’s identity from your own identity in the fediverse.



It does what it says on the label, and it even works with custom post types if ActivityPub is enabled for them. It has wp-cli support, too.



If you federate your blog posts with the ActivityPub plugin and want to automatically boost them from your main account, give it a try!


Does what it says on the label

Automatically boost WordPress posts on connected Mastodon accounts when published via ActivityPub.

Event Bridge for ActivityPub vs FediBoost