For internal machine-to-machine communications you can replace your full blown HTTP server + JSON inefficencies with a simple ZMQ request/reply + binary seriali

For internal machine-to-machine communications you can replace your full blown HTTP server + JSON inefficencies with a simple ZMQ request/reply + binary serialisation format. It also allows one machine to broadcast a message to a 'topic' that other machines listen for. Many other things. It's not perfect, but it Just Works.