Simple Message Server is a Chrome add-on that functions as a WebSocket server, allowing up to five clients to connect simultaneously. It enables users to send text messages to other connected clients seamlessly. The server is designed to handle disconnections effectively, ensuring that communication remains stable and reliable.

The program supports basic text data transmission, making it easy to use for real-time messaging applications. Users can retrieve their socket ID by sending a specific command from the client, which the server responds to with the socket ID value. This feature enhances the service's usability by providing clients with essential connection information.