The service interruption to IPNs (Instant Payment Notifications) ended at Oct 19, 11:58 PM PDT and interruption to MassPay ended at Oct 20, 12:06 AM PDT. Both services are now available, however the maintenance activity is still in progress and the maintenance window will be open until Oct 20, 1:00 AM PDT (Oct 20, 9:00 AM BST)