Use GetBucketReplication with an AWS SDK or CLI

The following command retrieves the replication configuration for a bucket named amzn-s3-demo-bucket:

aws s3api get-bucket-replication --bucket amzn-s3-demo-bucket

Output:

{
    "ReplicationConfiguration": {
        "Rules": [
            {
                "Status": "Enabled",
                "Prefix": "",
                "Destination": {
                    "Bucket": "arn:aws:s3:::amzn-s3-demo-bucket-backup",
                    "StorageClass": "STANDARD"
                },
                "ID": "ZmUwNzE4ZmQ4tMjVhOS00MTlkLOGI4NDkzZTIWJjNTUtYTA1"
            }
        ],
        "Role": "arn:aws:iam::123456789012:role/s3-replication-role"
    }
}

    /**
     * Retrieves the replication details for the specified S3 bucket.
     *
     * @param s3Client           the S3 client used to interact with the S3 service
     * @param sourceBucketName   the name of the S3 bucket to retrieve the replication details for
     *
     * @throws S3Exception if there is an error retrieving the replication details
     */
    public static void getReplicationDetails(S3Client s3Client, String sourceBucketName) {
        GetBucketReplicationRequest getRequest = GetBucketReplicationRequest.builder()
            .bucket(sourceBucketName)
            .build();

        try {
            ReplicationConfiguration replicationConfig = s3Client.getBucketReplication(getRequest).replicationConfiguration();
            ReplicationRule rule = replicationConfig.rules().get(0);
            System.out.println("Retrieved destination bucket: " + rule.destination().bucket());
            System.out.println("Retrieved priority: " + rule.priority());
            System.out.println("Retrieved source-bucket replication rule status: " + rule.status());

        } catch (S3Exception e) {
            System.err.println("Failed to retrieve replication details: " + e.awsErrorDetails().errorMessage());
        }
    }

Example 1: Returns the replication configuration information set on the bucket named 'mybucket'.

Get-S3BucketReplication -BucketName amzn-s3-demo-bucket