If you can't set an endpoint to receive the events via webhooks, you can use long polling to get the events.
The max number of events that can be returned in each request is 30.
The max number of requests you can make to this endpoint is 10 per minute.
The events are expired after 3 days.

After a polling request, the events will be deleted automatically from our servers. If you wish to delete the event only after the event has been processed successfully, set the deleteEvents parameter to false and use the delete events endpoint.

Click Try It! to start a request and see the response here!