The Contacts API allows you to perform these actions in bulk:
When your app calls one of the bulk endpoints listed above,
a new bulk job is started, and the
jobId is returned.
You can use the Bulk Jobs API
to get the status of any active or completed bulk job.
Retrieves a list of bulk jobs. Up to 100 bulk jobs can be returned per request.
Bulk jobs are started with bulk operation endpoints in the Contacts API