MQTT.org can't answer that as it's a web page for for a protocol. I've worked on platforms that do have a historian feature but it will vary from broker to bro

MQTT.org can't answer that as it's a web page for for a protocol. I've worked on platforms that do have a historian feature but it will vary from broker to broker. (disclosure, I work on Eclipse Amlen and it does not - but people often rig it up to a subscriber that funnels (some/all) messages into databases