Zotero used to have this... it's been down for more than a year now:

https://www.mediawiki.org/wiki/Citoid/Determining_if_a_URL_has_a_translator_in_Zotero

https://groups.google.com/forum/#!searchin/zotero-dev/mvolz%7Csort:relevance/zotero-dev/gS-ox9OBLCE/EmBTODvHCwAJ

Trust me, these WERE really nice when they were up :). I'm not sure how we can help to get them running again...

I've lost track of the GitHub threads, but wasn't there a place where someone said it was back in consideration? Or perhaps a similar tool?

An alternative to this proposal could be just including the name of the active translator in the Zotero Translation Server results (if not the specific Citoid implementation) so that users can confirm that the right translator is being called. Not sure if there's a better way of doing that. I don't know whether my original proposal is really needed only because it seems like everything save for a handful is actively synched so we'd only need to know (1) which translators were excluded from the sync, and (2) the time of the last sync with the Zotero branch (if it isn't always kept in sync).

FYI the Zotero one is back up.

https://zotero-translator-tests.s3.amazonaws.com/index.html

Another thing that might help is that responses now include the metadata source in the source field, so you can tell if any given response is coming from a zotero translator or not:

See:

https://citoid.wikimedia.org/api?format=mediawiki&search=example.com

vs.

https://citoid.wikimedia.org/api?format=mediawiki&search=http%3A%2F%2Flink.springer.com%2Fchapter%2F10.1007%2F11926078_68

Does this resolve the issue?