WebSockets can be used by web applications or web sites to setup a
bi-directional (two-way), full duplex communication channel over a
single TCP connection.
It features a lightweight protocol, allowing developers to realize realtime use cases. WebSockets do also provide an alternative to heavy use of Ajax, HTTP Long Polling or Comet.
After an initial HTTP based handshake, the TCP connection is kept open, allowing applications to send & receive arbitrary data. Often port 80 or 443 for encrypted WebSocket channels are used.
The WebSocket standard is defined in
ZAP is able to:
WebSocket messages are displayed within the WebSockets tab.
The WebSocket add-on adds new scripts and additional endpoints to the ZAP API