When testing against sca1001, I get the following error:
curl -XPOST -d'format=mediawiki' -d'url=http://link.springer.com/chapter/10.1007/11926078_68' http://sca1001:1970/url
"Internal server error"
In `/var/log/citoid/main.log`, I see
Request made for: http://link.springer.com/chapter/10.1007/11926078_68
Server at http://localhost:1969/%s does not appear to be running.
It looks as if zotero is not actually running. Restarting citoid does not help.