Streaming API Developer Guide

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
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Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

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/.