These allocations are for standard-volume events defined in API version 44.0 and earlier.
You can no longer define new standard-volume custom platform events. New platform events are high volume by default. Standard-volume custom platform events will be retired in Summer ’27. To migrate existing standard-volume events, see Migrate Standard-Volume Platform Events to High-Volume Platform Events Before Retirement.
| Description | Performance and Unlimited Editions | Enterprise Edition | Developer Edition and Professional Edition (with API Add-On) |
|---|
| Event Delivery: maximum number of delivered event messages in the last 24 hours, shared by all CometD clients1 | 50,000 | 25,000 | 10,000 |
| Event Publishing: maximum number of event messages published per hour | 100,000 | 100,000 | 1,000 |
If you exceed the event delivery allocation, you receive this error: 403::Organization total events daily limit exceeded. The error is returned in the Bayeux /meta/connect channel when a CometD subscriber first connects or in an existing subscriber connection. For more information, see Streaming API Error Codes in the Streaming API Developer Guide. Standard-volume event messages that are generated after exceeding the allocation are stored in the event bus. You can retrieve stored standard-volume event messages as long as they’re within the 24-hour retention window.
To monitor your standard-volume event delivery usage, use the limits REST API resource, and inspect the DailyStandardVolumePlatformEvents value. And to monitor the publishing usage, inspect the HourlyPublishedStandardVolumePlatformEvents value. For more information, see List Organization Limits in the REST API Developer Guide.
1To request a higher number of standard-volume events delivered to CometD clients, contact Salesforce to purchase an add-on license. The add-on license increases your daily limit of delivered events by 100,000 more events. For example, for Unlimited Edition, the add-on license increases the daily limit of delivered events from 50,000 to 150,000 events. You can purchase multiple add-ons to meet your event requirements for CometD clients. To avoid deployment problems and degradation in service, we recommend that the number of events delivered to CometD clients not exceed 5 million per day. If you require more external events, contact your Salesforce representative to understand how the product can scale to meet your needs.
j