AI bots · Training
Google-Extended
Not a crawler. A robots.txt control token for whether content Google crawls may be used to train Gemini models and for grounding in Gemini Apps and Vertex AI.
- Run by
- Type
- Training bot
- robots.txt token
Google-Extended- User-agent string
None. Crawling is done with existing Google user agents; the token is only read in robots.txt.- Honours robots.txt
- Yes, it exists only as a robots.txt token. Blocking it does not affect Google Search inclusion or ranking.
- Official docs
- developers.google.com
Block it
User-agent: Google-Extended Disallow: /
Allow it
User-agent: Google-Extended Allow: /
A named group replaces the * group for this bot, so repeat any private-path Disallow lines in it. Firewalls (Cloudflare AI Crawl Control, Vercel AI Bots ruleset) can block it even when robots.txt allows it. See fixes per stack.
Other training bots
- GPTBot (OpenAI)
- ClaudeBot (Anthropic)
- Applebot-Extended (Apple)
- CCBot (Common Crawl)
- Meta-ExternalAgent (Meta)
- Amazonbot (Amazon)
- MistralAI-Training (Mistral AI)
- Bytespider (ByteDance)