How about monitoring via polling? I'm imagining something like this... - Set up application with your AWS/S3 credentials - Poll S3 to get list of all your bu

How about monitoring via polling? I'm imagining something like this... - Set up application with your AWS/S3 credentials - Poll S3 to get list of all your buckets on a regular interval (once a day, every 5 minutes, whatever) - Get a list of some files in those buckets - Try to access those files directly w/ no authentication or authorization - Set up some rules about how to interpret the results (look for any public files, look for specific private buckets, look any buckets that are public & haven't been whitelisted, whatever) There's probably a ton of ways to do this. For simple use cases, it shouldn't be too tough. That'd be a fun hack for a day project, and I'd be happy to pair with you on it if interested. It's probably spending a little time looking around for an off the shelf solution first.