Currently, notifications can only be created inside Quay on a repo level. It's a bit cumbersome to create same notifications for all repos in a namespace, particularly if the namespace contains many repos. There are two choices here:

1) create a new set of notifications on a namespace level that would monitor the namespace state and all images inside, or
2) create an API endpoint that would apply the individual notification to all repos in the namespace, eliminating the need to iterate through all repositories separately.