If I understand your question right, you should be able to use the “Simple JSON datasource” to achieve this. The required endpoints/format, as well as how to install it, are described here: https://grafana.com/grafana/plugins/grafana-simple-json-datasource
I haven’t used Grafana Cloud myself, but believe this is available on Cloud also (and definitely if you have your own install)
Thank you for your reply. I looked at the doc on simple json, not very clear. Right now, i use Graphite.