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Available from version 5.6.0.

WebSocket enables interaction between a server and a client (browser) w/o the latter making polling requests. Example: When a new notification is received, the server sends the information to the browser in real time.

Out-of-the-box WebSocket covers the following features:

  • New in-app notifications;
  • New event reminders;
  • Updates in stream on the record detail view;
  • Updates of the detail view (since 5.9.0).

Important: You need to have zmq php extension installed.

Enable Use WebSocket parameter at Administation > Settings.


You need to run websocket.php as a daemon.

Using systemd

Create a file /etc/systemd/system/espocrm-websocket.service.

Description=EspoCRM WebSocket Service

ExecStart=/usr/bin/php /path/to/espocrm/websocket.php


Command to get the service to start on boot:

systemctl enable espocrm-websocket.service

Command to start the service:

systemctl start espocrm-websocket.service

SSL support

You need to set up a proxy that will forward SSL request to our websocket server and vice-versa.


You need to have proxy and proxy_wstunnel modules installed.

sudo a2enmod proxy
sudo a2enmod proxy_wstunnel

In your apache config inside VirtualHost section for SSL (<VirtualHost _default_:443>) add the following:

    <IfModule proxy_module>
          ProxyRequests Off
          <Location /wss>
               ProxyPass ws://your-domain:8080
               ProxyPassReverse ws://your-domain:8080


Add to server.conf:

map $http_upgrade $connection_upgrade {
  default upgrade;
  '' close;

upstream websocket {

Add to section server:

location /wss {
    proxy_pass http://websocket;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
    proxy_read_timeout 12h;

Note: By default, Nginix has proxy_read_timeout parameter set to 60 (seconds). You need to increase the value to avoid the connection being terminated too soon. In the example, we set it to 14h.

Checking whether it works

Click F12 to open a browser console. See whether there's any error related to WebSocket. If you enabled WebSocket in settings, a frontend client will try to connect to WebSocket once a page is loaded. If something went wrong, an error will be displayed in the browser console.