ThingWorx to MQTT

Hello. I am trying to implement a digital Andon solution. In order to trigger an issue, I must publish to an MQTT topic on a specific endpoint (so from TWX -> external MQTT endpoint).

Is that possible to do from a Javascript TWX service? Or do I have to create my own proxy behind a regular HTTP API to accomodate for ThingWorks lack of capability in this regard?

Googling is difficult because it seems apparent that TWX is capable of becoming a MQTT-server, but I need it to act as a client. Possible? How?