Despite the common search term "MQTTX broker download," it is important to note that . Instead, it is a high-performance, open-source MQTT client toolbox designed for testing and debugging IoT applications . To use MQTTX, you must connect it to an external MQTT broker like EMQX or Eclipse Mosquitto.

This guide provides everything you need to download and set up the various versions of MQTTX, along with how to connect them to a broker for your IoT projects.

MQTTX is available in three distinct versions to suit different developer workflows: MQTTX: All-In-One Testing and Debugging for IoT Apps | EMQ