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.
Category
Expected Behavior
mirrorweb returns on a cadence to capture full snapshots of your pages for the historical record. Expect complete page fetches rather than metadata checks, at a frequency that rises with your site's popularity and how often your content changes.
Overview
| Operated By | MirrorWeb |
| Expected To Follow Robots.txt | Yes |
| 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 mirrorweb in their robots.txt files.
Overall Archiver Traffic
As of July 6, 2026, 0.1% of all web traffic came from archivers.
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.
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/ |
Access other known user agents and IP addresses using the Enterprise API.
How To Block mirrorweb
Add this rule to your robots.txt file to block mirrorweb from accessing your entire website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: mirrorweb # https://knownagents.com/agents/mirrorweb
Disallow: /Frequently Asked Questions
Should I Block mirrorweb?
Almost never. mirrorweb preserves snapshots of your pages so the record survives redesigns, migrations, and dead links. Blocking only stops new captures. Snapshots that already exist stay public until you ask the archive itself to remove them. Almost none of the top websites we track have robots.txt rules for mirrorweb right now.
Does mirrorweb Respect Robots.txt?
Yes. mirrorweb is expected to honor robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms mirrorweb actually honors it.
Does mirrorweb Access Private Content?
It archives only what any anonymous visitor can see. Anything public at crawl time can stay retrievable in mirrorweb's archive long after you take it down.
Why Is mirrorweb Visiting My Website?
mirrorweb is preserving your pages as part of the historical record. Visits recur on a schedule 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 periodic full page captures that recur on a schedule. Keep in mind that mirrorweb 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.