CloudPostOffice is realtime messaging for apps, scripts, and AI agents. No MQTT broker setup or configuration, no infrastructure to manage. p1 = cpo.postbox( postbox-1 , your-secret ) p1.send(to= postbox-2 , msg= hello ) p2 = cpo.postbox( postbox-2 , your-secret ) p2.listen(lambda msg: print(msg))