Supported CometD Versions

Use CometD version 3.1.0 or later in your clients to connect to Streaming API. Earlier versions aren’t supported and could result in unexpected behavior. To prevent potential issues with old CometD versions in your clients, upgrade the CometD library to a supported version. For more information, see https://cometd.org/.

Getting Started with Streaming API
Code Examples
Client Connection Considerations
Clients and Timeouts
Clients and Cookies for Streaming API
Supported CometD Versions
Streaming API Calls Blocked by Security Settings
Debugging Streaming API Applications
Using an Experience Cloud Site with Streaming API-Based Features
PushTopic Events (Legacy)
Generic Events (Legacy)
Monitoring Event Usage
Previous Versions