How to deploy HiveMQ Extension/custom extension in HiveMQ cloud cluster
HiveMQ Cloud FREE/Serverless/Starter does not support deploying HiveMQ Extensions but Enterprise does. For more details please check out https://www.hivemq.com/pricing/ page.
If you are interested in the HiveMQ Cloud Enterprise package please feel free to reach our sales team to share your requirements and talk to you about our tailored HiveMQ Cloud Enterprise offerings or help you identify which of our HiveMQ Cloud plans will fit your needs best.