Websocket Source Options See Spring Functions Catalog for configuration options. Examples To verify that the websocket-source receives messages from Websocket clients, you can use the following simple end-to-end setup. Step 1: Start kafka Step 2: Deploy websocket-source on a specific port, say 8080 Step 3: Connect a websocket client on port 8080 path "/websocket", and send some messages. You can start a kafka console consumer and see the messages there.