WPSignal

WPSignal is an independent service for realtime WordPress events. It serves as a WebSocket relay for a WordPress site, and in combination with the WordSocket plugin it can trigger events for any WordPress action hook and dispatch them from PHP code to all browsers connected to the site. The page describes it as a way to get realtime WordPress events with zero polling.

The service is built around persistent WebSocket connections, with Server-Sent Events as an automatic fallback. It includes keepalive pings every 20 seconds. Events are signed with SHA-256 HMAC, and the page says it has timestamp replay protection and per-site rate limiting built in. When used with WordSocket, events are AES-256-GCM encrypted before leaving WordPress, and WPSignal only sees ciphertext.

For developers, WPSignal provides a fluent trigger API that can attach events to any WordPress action hook and combine channel, payload, and condition in one call. The browser client auto-connects and dispatches native CustomEvent objects, which can be handled with plain JavaScript or integrated with a frontend framework. It also includes a built-in admin Explorer page that shows connection status, a live event log, a publish form, and a token inspector for debugging.

Setup is described through WordPress admin, WP-CLI, and Composer. The page says the WordSocket plugin can be downloaded from WordPress.org or GitHub, installed with wp plugin install wordsocket --activate, or required with composer require wpackagist-plugin/wordsocket. It also says each WordPress site gets its own site_key and publish secret, with tenant isolation enforced at the channel level, and that the service is free during beta with no credit card required.