What is meta-externalfetcher?
meta-externalfetcher is used by Meta to perform user-initiated fetches of individual links from AI assistant product functions. Agent Analytics can track when it visits your website.
Overview
| Operated By | Meta |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 12, 2026 |
Category
Expected Behavior
meta-externalfetcher fetches one page at a time, the moment someone asks a question it can answer, so it never crawls your site. How much you see depends on how many people use meta-externalfetcher and how often they ask about what your site covers. A popular assistant can hit you steadily, while a single user or a niche one stays quiet between occasional spikes.
meta-externalfetcher's User Agent
| User Agent | Meta-ExternalFetcher/1.0 |
How To Block meta-externalfetcher With Robots.txt
Add this rule to your robots.txt file to block meta-externalfetcher from accessing your entire website, or use Automatic Robots.txt to block all AI assistants at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: meta-externalfetcher # https://knownagents.com/agents/meta-externalfetcher
Disallow: /Global Insights for meta-externalfetcher
As of July 12, 2026, 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.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
8% of top websites block meta-externalfetcher in their robots.txt files.
Overall AI Assistant Traffic
1.5% of all web traffic came from AI assistants.
Top Visited Website Categories
The types of websites most frequently visited by meta-externalfetcher.
Frequently Asked Questions
Should I Block meta-externalfetcher?
Probably not. meta-externalfetcher fetches a page when someone asks a question it can answer, and the response cites and links to your site. Blocking it removes you from those answers without improving your Google rankings, because assistants play no part in traditional search indexing. For comparison, 8% of the top websites we track already have robots.txt rules for meta-externalfetcher.
Does meta-externalfetcher Follow Robots.txt Rules?
Yes. meta-externalfetcher is expected to follow 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 meta-externalfetcher actually follows it.
Does meta-externalfetcher Access Private Content?
It has no way in. meta-externalfetcher fetches pages the way an anonymous visitor loads a URL, with no stored logins. Anything behind a paywall or a login stays out of its reach.
Why Is meta-externalfetcher Visiting My Website?
Someone asked Meta's assistant a question your page can help answer. meta-externalfetcher retrieved the page in that moment to ground the answer, usually with a citation linking back to you.
How Can I Tell if meta-externalfetcher Is Visiting My Website?
Agent Analytics tracks meta-externalfetcher 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 "meta-externalfetcher". Look for fetches of individual pages that do not follow a crawl pattern. Keep in mind that meta-externalfetcher 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.