PBI API limit exceeded error when trying to copy Notebook on Fabric

Hi PyyneCST ,

Thank you for the update.

The HTTP 429 error indicates request throttling on the Fabric/Power BI service side. Even though the operation was simply duplicating a Notebook, this action can internally trigger multiple Power BI REST API calls (for example, retrieving metadata, copying artifacts, permissions, and workspace item registration). If several operations occur within a short time window, the service may temporarily enforce throttling.

Currently, the exact request limits for many Fabric operations are not publicly documented, as they can vary depending on factors such as capacity load, concurrent requests, and backend service protection policies. This is why the documentation does not list a fixed limit.

Since the issue resolved automatically, it confirms the throttling was temporary service-side protection rather than a configuration problem with your account or workspace capacity.

If the issue starts occurring frequently, we recommend:

Monitoring capacity metrics for spikes in activity
Avoiding rapid repeated artifact operations (copy/create/update)

Implementing retry logic with backoff when automating Fabric API operations

Please let us know if the issue reoccurs or if additional details are needed.

Best Regards,
Chaithra E.