Hi,
 
verb - POST
api - snapmirror/policies
body - {'name': 'ansible_policy', 'svm': {'name': 'ansible_snap'}, 'type': 'async'}
my assumption was async is async-mirror, but it's configured in ONTAP as mirror-vault.
ontap97::> snapmirror policy show -vserver ansible_snap
Vserver Policy             Policy Number         Transfer
Name    Name               Type   Of Rules Tries Priority Comment
------- ------------------ ------ -------- ----- -------- ----------
ansible_snap
        ansible_policy     mirror-vault  1     8  normal  -
  SnapMirror Label: sm_created                         Keep:       1
                                                 Total Keep:       1
is async in REST is mirror-vault?
Thanks,
Mohan