Thanks for looking into this issue Arvo.

This wiki is not of mine, but I'll try to ask its administrators if they would be interested to venture into an upgrade.

How it would be difficult to make a workaround you are refering to?

{"warnings":{"siteinfo":{"*":"Unrecognized values for parameter 'siprop': functionhooks, extensiontags, protocols”}}}

Without the list of protocols, Parsoid doesn’t know which are valid for external links.

Your special page shows a pretty old version of Mediawiki,
http://www.cruiserswiki.org/wiki/Special:Version

Is upgrading a possibility? If not, it doesn’t seem like the API exposed
the info in that version. We could possibly add a Parsoid config as a workaround.