That’s an X-Y problem - what you actually want to do is to turn the JSON in to something that can be inserted in to MariaDB - the intermediary step of thinking in terms of CSV will be clouding the issue on your searches, which, as you say, will be cluttered with Grap (Google Cr_p).
As MariaDB is a relatively new thing compared to all the mySQL blog posts, so I’d also think about using that as a keyword rather than MariaDB.
And search this forum as it does have some hits as, well, this is where most people doing this sort of stuff are likely to be. This older post may help: HTTP integration - #26 by Charles, the participants from that point of that topic do know stuff.