I'm unsure of how oneboxing is setup for blog posts to Discourse

[maiki]

That would be RSS Polling:

RSS Polling

Summary Discourse RSS Polling enables support for importing embedded content from multiple RSS/ATOM feeds Repository Link https://github.com/discourse/discourse-rss-polling Install Guide How to install plugins in Discourse Enabling RSS Polling The RSS Polling plugin can be enabled either by the toggle or from its settings, both accessible from your admin/plugins page: [/admin/plugins] Hosted by us? Please contact o…

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@Alexander

I’m not sure, but I think this is what you’re looking for

That part is for embedding on the site: two sides of a coin integration.