Hi, I just published an experimental Python based tool on github, which I created because I needed a tool that can read JSON from any URL and publishes it to an MQTT broker.
The Python script can be found here and I added support for XML, CSV, YAML formatted data as well as the possibility to get the data from HTTP, HTTPS or a local file.
Although I am not using Home Assistant (yet - I beg for mercy!), I guessed that this might be useful for this community as well, in case an integration is not available or feasible for HA.
I would love to receive feedback / bug reports / feature requests, if anyone has time to check it out: