Use GetBucketNotification with a CLI

The following command retrieves the notification configuration for a bucket named my-bucket:

aws s3api get-bucket-notification --bucket my-bucket

Output:

{
    "TopicConfiguration": {
        "Topic": "arn:aws:sns:us-west-2:123456789012:my-notification-topic",
        "Id": "YmQzMmEwM2EjZWVlI0NGItNzVtZjI1MC00ZjgyLWZDBiZWNl",
        "Event": "s3:ObjectCreated:*",
        "Events": [
            "s3:ObjectCreated:*"
        ]
    }
}

Example 1: This example retrieves notification configuration of the given bucket

Get-S3BucketNotification -BucketName amzn-s3-demo-bucket | select -ExpandProperty TopicConfigurations

Output:

Id   Topic
--   -----
mimo arn:aws:sns:eu-west-1:123456789012:topic-1