Broadcast Message to multiple devices of Same Model

Are there any plans to implement an external URL for groups of imps or an entire model? For instance if I have 10,000 imps all running under the same model’s firmware will there be a way to send a broadcast POST Request or will I need to send 10,000 individual requests?

Ideally, I’d like an external URL for the model and then be able to write an Agent for that model so that I can target subsets of devices in the model. I could send one message to the imp cloud which would then send all the other messages internally, drastically reducing the overhead on the imp cloud and on my third party server.