Key Takeaways
- Anthropic Claude bots are web crawlers that collect data, retrieve web pages, and improve search functionality.
- ClaudeBot gathers publicly available data, while Claude-User fetches pages based on user queries in real time.
- Claude-SearchBot enhances search relevance and indexing within Claude.
- Website owners can block bots through robots.txt, but must do so individually for each bot.
- Anthropic recommends against blocking by IP address to avoid disrupting services and accessing robots.txt.
Anthropic Claude bots are web crawlers operated by Anthropic. The company updated its crawler documentation in February 2026. The update explains how the bots access content and how site owners can manage them.
Anthropic uses three separate user agents. Each one serves a different purpose.
Types of Anthropic Claude Bots
ClaudeBot collects publicly available web data. Anthropic says this content may be used to train and improve its AI models.
Claude-User retrieves webpages when a user query requires external information. The request happens in real time. If blocked, Claude cannot access that page during a user interaction.
Claude-SearchBot crawls websites to support search-related features inside Claude. It helps improve indexing and relevance for responses.
How Website Owners Can Block the Bots
All bots follow robots.txt rules. Anthropic states that its crawlers respect standard robots exclusion directives. They also follow the Crawl-delay directive.
Website owners must block each bot individually in robots.txt. A rule for ClaudeBot does not automatically block the other two agents. Separate directives are required.
Anthropic advises against blocking by IP address. The bots operate using shared cloud infrastructure. Blocking IP ranges could interfere with other services. It may also prevent the bots from accessing robots.txt files.
The documentation clarifies the role of each bot. It explains how blocking affects training, real-time retrieval, and search visibility within Claude.
Source: https://searchengineland.com/anthropic-claude-bots-470171
