Monitoring Linux systems using SSH

Are ssh keys supported yet?  Better yet would be the ability to fetch an ssh key, by name, from a key management service such as those offered by AWS and others.  I don't want to have to encode passwords into the logicmonitor interface, and I certainly don't want to have to leave a private key with access to all my production resources on my collector, but my collector runs on an ec2 instance that has an instance role assigned to it, so it would be trivial to give that role a policy which allows it to fetch a key by name.  If the basic ssh functionality included in scripts were to include the ability to look up an ssh key, or could receive the output of a different data source (I could write a script to fetch the key easily enough), that would be ideal, since modifying every data source to use a different script would be a drag.  This would give me the ability to use key-based authentication for ssh while still allowing me to do key management without having to update filesystems and logicmonitor properties.  I could simply rotate in a fresh key in the key management service and everything would continue to function normally.