What is mirrorweb?
mirrorweb is a web archiving crawler that captures websites in their entirety, including dynamic content and interactive elements, creating tamper-proof WARC archives for compliance. Agent Analytics can track when it visits your website.
Overview
| Operated By | MirrorWeb |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | August 11, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
mirrorweb periodically fetches complete pages rather than checking metadata alone. Visit frequency typically rises with your site's popularity and update cadence.
mirrorweb's User Agent
| User Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 +https://www.mirrorweb.com on behalf of https://www.loc.gov/programs/web-archiving/for-site-owners/ |
How To Block mirrorweb With Robots.txt
Add this rule to your robots.txt file to block mirrorweb from accessing your entire website, or use Automatic Robots.txt to block all archivers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: mirrorweb # https://knownagents.com/agents/mirrorweb
Disallow: /Global Statistics for mirrorweb
As of August 11, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
0% of top websites block mirrorweb in their robots.txt files.
Overall Archiver Traffic
0.0% of all web traffic came from archivers.
Frequently Asked Questions
Should I Block mirrorweb?
Rarely. mirrorweb preserves snapshots of your pages through redesigns, migrations, and broken links. Blocking it prevents future captures but does not remove existing snapshots. To remove those, you must contact the archive directly. Almost none of the top websites we track currently have robots.txt rules for mirrorweb.
Does mirrorweb Follow Robots.txt Rules?
Yes. mirrorweb is expected to follow robots.txt directives, so a disallow rule is the appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether mirrorweb respects it.
Does mirrorweb Access Private Content?
No. mirrorweb archives only what an anonymous visitor can see. Anything public at crawl time may remain available in its archive long after you remove it from your site.
Why Is mirrorweb Visiting My Website?
mirrorweb is preserving your pages as part of a historical record. It returns periodically so the archive can capture how your content changes over time.
How Can I Tell if mirrorweb Is Visiting My Website?
Agent Analytics tracks mirrorweb 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 "mirrorweb". Look for a page and its embedded assets being fetched again after a long interval. Because mirrorweb does not publish a verification method, any client can claim its identity and a log match is only a clue.