Rejax
Reverse AJAX service for pushing real-time notifications to clients.
Read docs Updated 2026-06-17
What is Rejax?
Rejax is a reverse AJAX service that enables servers to notify connected clients directly.
It is useful for developers who need to deliver real-time updates in web applications without relying on repeated client requests.
What you can build with Rejax
Real-time dashboard updates
Push live metrics and status changes from backend services directly to admin dashboards without clients polling endpoints.
Live notification feeds
Deliver instant alerts for events like new orders or system alerts to connected web clients using reverse AJAX.
Collaborative editing indicators
Notify users of concurrent changes in shared documents or project boards by streaming updates server-to-client.
Get started with Rejax
- 1Obtain an API key from the Rejax service dashboard
- 2Include the API key in request headers for authentication
- 3Establish an HTTPS reverse AJAX connection from your server
- 4Configure server endpoints to push notifications to connected clients
- 5Test delivery by triggering a sample server event
Rejax: pros & cons
Pros
- +Eliminates client-side polling overhead
- +Uses standard HTTPS for secure transport
- +Simple API key authentication
- +Lightweight integration for existing web apps
Cons
- –Requires persistent server-side connection management
- –Browser support depends on reverse AJAX compatibility
- –No built-in fallback for unsupported clients mentioned
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Frequently asked questions
Rejax is a service that enables server-to-client notifications over reverse AJAX, removing the need for client polling.
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