What is 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 relevant and accurate, allowing proper citation and linking back to source content. You can set up Agent Analytics to see when meta-webindexer visits your website.
Category
| Example User Agent | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 (compatible; meta-webindexer/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 | Not expected |
| Affects AI Chat & Search Visibility | Yes |
| Expected To Follow Robots.txt | Yes |
Why Is meta-webindexer Visiting My Website?
meta-webindexer is updating an AI search index so your pages can appear in its results. It may have discovered your site through links, a sitemap, or mentions of your domain.
Should I Block meta-webindexer?
Usually not. Blocking meta-webindexer keeps your pages out of its AI search results and can eliminate referral traffic from that channel. It does not improve traditional search rankings. For context, 11% of the top websites we track currently have robots.txt rules for meta-webindexer.
How Do I Block meta-webindexer Using Robots.txt?
Add this rule to your robots.txt file to block meta-webindexer from accessing your website, or use Automatic Robots.txt to block all AI search crawlers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: meta-webindexer # https://knownagents.com/agents/meta-webindexer
Disallow: /Insights for meta-webindexer
As of October 31, 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-webindexer?
meta-webindexer revisits your site on a flexible schedule, often requesting several pages in a burst. Activity usually increases when your content changes or its index refreshes, with quiet intervals between crawl passes.
Does meta-webindexer Follow Robots.txt Rules?
meta-webindexer 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-webindexer respects it.
Is meta-webindexer Used for AI Model Training?
Not ordinarily. meta-webindexer is not categorized as an AI training scraper or data provider, so AI model training is not its expected purpose.
Does Blocking meta-webindexer Affect AI Search or Citations?
Yes. Blocking meta-webindexer can keep your pages out of the AI search index it supplies, reducing their eligibility to appear or be cited in that product's answers.
Does meta-webindexer Access Private Content?
No special access. meta-webindexer can reach only content available to anonymous visitors. Make sure staging sites and other sensitive areas require authentication.
How Can I Verify a Request From meta-webindexer?
Agent Analytics tracks visits from meta-webindexer and every other known AI agent, crawler, and scraper, then authenticates each visit using meta-webindexer's published verification method. You can also check your server logs for requests whose user-agent string contains "meta-webindexer". Look for bursts that follow links across several pages and recur over time. A matching log entry alone is not proof because any bot can claim to be meta-webindexer.
How Is meta-webindexer 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-externalagent: meta-externalagent crawls web content for training AI models and improving Meta's products by indexing content directly across the internet.
- facebook: facebook is a fetcher operated by Meta.