RSS or Rest API access to forum threads

Does Grafana community forum has rss feed or REST API based access to json data ?

Check page html source code. RSS links are offered in the page header, e.g. https://community.grafana.com/c/howto :

<link rel="alternate" type="application/rss+xml" title="Latest posts" href="https://community.grafana.com/posts.rss" />
<link rel="alternate" type="application/rss+xml" title="Latest topics" href="https://community.grafana.com/latest.rss" />
<link rel="alternate" type="application/rss+xml" title="RSS feed of topics in the &#39;HowTo&#39; category" href="https://community.grafana.com/c/howto.rss" />

API: https://docs.discourse.org/