Is message delivery guaranteed when using the Streaming API?

The Streaming API in Salesforce provides a way to receive real-time notifications of changes to Salesforce data. However, it does not guarantee message delivery. This means that while it is designed to deliver notifications efficiently, there are scenarios, such as network issues, server outages, or other interruptions, that may prevent messages from being processed or delivered successfully to subscribers.

This inherent nature of the Streaming API means that developers must design their applications with this possibility in mind, ensuring that any critical data is confirmed and handled appropriately, rather than relying solely on the Streaming API for all message delivery needs.

Options suggesting guaranteed delivery or conditions during specific times misunderstand the mechanics of the Streaming API and the nature of real-time data processing. While it is a powerful tool for real-time notifications, it operates under a best-effort model, thus leading to the understanding that message delivery cannot be assured.