What is meta-externalagent?
meta-externalagent crawls web content for training AI models and improving Meta's products by indexing content directly across the internet. You can set up Agent Analytics to see when meta-externalagent visits your website.
Category
| Example User Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 (compatible; meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)) |
| Operated By | Meta |
| Source | Official Website |
| Identity |
Verified
Verified Identification
Requests claiming to be this agent can be authenticated using its published verification method. |
| Triggered By | Automated crawl |
| Used for AI Model Training | Yes |
| Affects AI Chat & Search Visibility | Not directly |
| Expected To Follow Robots.txt | Yes |
Why Is meta-externalagent Visiting My Website?
Your content matched the criteria Meta set for a training dataset. meta-externalagent typically discovers pages through external links, sitemaps, and seed lists rather than because someone selected your site individually.
Should I Block meta-externalagent?
Block meta-externalagent if you want more control over whether your work is used for AI training. Allowing it may increase the chance that your brand appears in AI-generated answers, but either choice leaves traditional search rankings unchanged. For context, 20% of the top websites we track currently have robots.txt rules for meta-externalagent.
How Do I Block meta-externalagent Using Robots.txt?
Add this rule to your robots.txt file to block meta-externalagent from accessing your website, or use Automatic Robots.txt to block all AI data scrapers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: meta-externalagent # https://knownagents.com/agents/meta-externalagent
Disallow: /Insights for meta-externalagent
As of October 29, 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 Compliance
Country of Origin
Robots.txt Blocked Percentage
Frequently Asked Questions
What Traffic Patterns Should I Expect From meta-externalagent?
meta-externalagent tends to make broad, high-volume sweeps across many pages. Timing is unpredictable: traffic may remain heavy throughout a collection pass, then stop entirely.
Does meta-externalagent Follow Robots.txt Rules?
meta-externalagent is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether meta-externalagent respects it.
Is meta-externalagent Used for AI Model Training?
Yes. meta-externalagent collects web content for use in AI training datasets. Blocking it limits future collection but cannot remove content that was collected previously.
Does Blocking meta-externalagent Affect AI Search or Citations?
Not directly. Blocking meta-externalagent limits collection for AI training rather than controlling a live AI search index or citation system.
Does meta-externalagent Access Private Content?
Not through legitimate access. meta-externalagent primarily targets public content, but some training-data scrapers also attempt to collect gated or paywalled pages. If content loads without authentication, assume it can be collected.
How Can I Verify a Request From meta-externalagent?
Agent Analytics tracks visits from meta-externalagent and every other known AI agent, crawler, and scraper, then authenticates each visit using meta-externalagent's published verification method. You can also check your server logs for requests whose user-agent string contains "meta-externalagent". Look for high page counts, short gaps between requests, and deep traversal through linked content. A matching log entry alone is not proof because any bot can claim to be meta-externalagent.
How Is meta-externalagent Different From Other Meta Agents?
Meta operates separate agents for different purposes, so each agent should be evaluated and controlled independently.
- Muse: Muse is a personal AI agent created by Meta that uses a web browser and connected apps to complete multi-step tasks such as filling out forms, booking travel, sending ema…
- meta-externalfetcher: meta-externalfetcher is used by Meta to perform user-initiated fetches of individual links from AI assistant product functions.
- FacebookBot: FacebookBot is a web crawler used by Meta to download training data for its AI speech recognition technology.
- meta-webindexer: meta-webindexer is Meta's web crawler that browses the internet to improve search results for Meta AI users. It analyzes online content to make Meta AI's responses more r…
- facebook: facebook is a fetcher operated by Meta.