What is Citoid?
citoid is Wikimedia's citation generation service that fetches metadata from URLs, DOIs, and ISBNs to automatically create formatted citations in Wikipedia and other wikis, using Zotero's translation server for accurate bibliographic data. Agent Analytics can track when it visits your website.
Category
Expected Behavior
Citoid shows up within seconds of someone sharing one of your URLs, grabs the title, description, and preview image, and leaves. Expect one hit per share, no link following, and volume that tracks how much your content circulates. A widely shared link can mean thousands of fetches in an hour.
Overview
| Operated By | Wikimedia |
| Expected To Follow Robots.txt | No |
| Insights Last Updated | July 6, 2026 |
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
As of July 6, 2026, 0% of top websites block Citoid in their robots.txt files.
Overall Fetcher Traffic
As of July 6, 2026, 3.8% of all web traffic came from fetchers.
This data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Citoid's User Agent
| User Agent | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36 Citoid/WMF (mailto:noc@wikimedia.org) |
Access other known user agents and IP addresses using the Enterprise API.
How To Block Citoid
Add this rule to your robots.txt file to request that Citoid not access your website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Citoid # https://knownagents.com/agents/citoid
Disallow: /Frequently Asked Questions
Should I Block Citoid?
No. Citoid builds the link preview that appears when someone shares your page in a chat or social feed. Blocking it turns those shares into bare links with no title or image, which fewer people click. Its traffic normally follows sharing activity rather than a crawl schedule, so if it ever starts crawling at volume, rate limit it instead of blocking it. Almost none of the top websites we track have robots.txt rules for Citoid right now.
Does Citoid Respect Robots.txt?
No. Citoid is not expected to honor robots.txt, so a disallow rule only states your preference. Enforce the block with firewall or server rules, then confirm in Agent Analytics that its requests actually stop.
Does Citoid Access Private Content?
It cannot. Citoid loads only the exact URL someone shared, reads the title, description, and preview image, and leaves. It has no credentials and does not follow links to other pages.
Why Is Citoid Visiting My Website?
Someone shared a link to your page. Citoid fetched it once to build the preview card, and every new share can trigger another fetch, so spikes mean your content is spreading.
How Can I Tell if Citoid Is Visiting My Website?
Agent Analytics tracks Citoid visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "Citoid". Look for hits on single pages moments after someone shares a link, with no crawling afterward. Keep in mind that Citoid doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.