Amazon released a note late last year about Amazon’s RDS is now supporting Oracle Enterprise Manager Agents.
Amazon RDS supports agent version 12 (12.1.0.5), 13R1 and 13R2 (13.2.0.0).
You can use this to monitor your DB instances running on Amazon’s RDB but there are some limitations, like the fact you cannot execute jobs against those targets.
See below for more information about this.
Thanks,
Alfredo