Looks up selected items by DOI in the OpenCitations COCI service and adds the result as a note.
Zotero Open Citations has Atlas grade A (recommended) because every code check came out low. It's a Zotero 6 plugin, so Zotero 7 and later can't load it. What to use instead. Last checked 6 Nov 2026.
Downloads a .xpi file (0.08 MB). In Zotero, open Tools → Plugins and install it from the file.
In useAn estimate of how many copies of Zotero have it: Zotero downloads each new version once for every copy that has the plugin, so we count the downloads of its most-downloaded recent release. Rounded. Plugins that update from outside GitHub count low.
690
DownloadsAll-time downloads of its release files from GitHub, counting every update. Installs from elsewhere aren't counted.
773
ReleasesVersions published on GitHub. Everyone who has the plugin downloads each one again, which adds up in Downloads.
5
StarsPeople who starred the repository on GitHub: a rough measure of interest.
38
ContributorsPeople who have committed code to the repository.
1
LicenceThe licence the code is published under, as GitHub reports it.
AGPL-3.0
A
Atlas gradeRecommended
A+AABC
because every code check came out low
Next rung: A+, once we've tested it installed in Zotero 10.
Applies to v0.3.0, released 1 Oct 2018Code checked · not yet tested in a live Zotero
Legacy plugin for Zotero 6 onlyUses the old plugin format. Zotero 7 and later can't load it.
What we found in the codeSets the gradeThe worst finding in these three areas sets the grade.
Code transparencyReadable code; not yet checked against the published sourceThe developer uploaded the release file from the zuphilip account. We haven't yet checked whether this file matches the public source code.UnknownWe couldn't check this yet.
Updates
Updates come from this project's GitHub repositoryThe update address offers this version
Where your data goesOnly contacts services we could identify3 addresses in 2 groups.LowLow concern: normal for plugins that do this job. Listed so you know.
Scholarly services (2)
doi.orgnamed in its codeThe address is in its code, but we didn't trace a request to it. It may be a link or unused.opencitations.net
Zotero (1)
Zotero lookup services
Where we found it
opencitations.netchrome/content/zoteroopencitations.js · line 39
let url = 'http://opencitations.net/index/coci/api/v1/citations/' + doi;
Powerful capabilitiesSends lookups unencrypted (http://) to opencitations.netLowLow concern: normal for plugins that do this job. Listed so you know.
Low concern (1)
Sends lookups unencrypted (http://) to opencitations.net
Before you installShown, not gradedFacts to help you decide. They don't change the grade.
Works withZotero 6 only (legacy plugin)Doesn't work with the current Zotero (10)MediumMedium concern: worth reading before you install. One medium finding makes the grade B.
Looks up selected items by DOI in the OpenCitations COCI service and adds the result as a note. The latest references are saved in a special collection in Zotero.
Adds open citation data to items in your library. Its developer marks it as early, with more functions still to do.
What you'll need
Detected automatically
We haven't detected any setup requirements. That isn't the same as none: check the developer's README.
Where your data goes
We found: only contacts services we could identify. 3 addresses in 2 groups.
Scholarly services (2)
doi.orgnamed in its codeopencitations.net
Zotero (1)
Zotero lookup services
Evidence · file and line
opencitations.netchrome/content/zoteroopencitations.js · line 39
let url = 'http://opencitations.net/index/coci/api/v1/citations/' + doi;
Forks and copies
No forks listed.
The developer's response
The developer hasn't responded. Developers can reply here, and their reply sits next to our findings.I'm the developer
Ratings and reviews
What people who use it say. This is separate from the grade, which is what the code does, and never changes it.
No ratings yet.
Write a review
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