API limits and 429 error limits

In our custom application, we call the Zoom Meeting API to add each registration for a meeting and webinar on a rolling basis as we receive registrations for our events.

1. Is there a limit on how many API calls can be processed at one time for creating these registrations for a user?
2. Is there an associated 429 error limit when creating registrations for a user's Zoom account within a 24-hour period?

Any insights or documentation references would be greatly appreciated. Thank you!