🤖 Overview

Claude-SearchBot is a web crawler operated by Anthropic, the AI company behind the Claude assistant. According to Anthropic’s official crawler policy at https://www.anthropic.com/legal/crawler-policy, this bot indexes publicly accessible web content to power search and real-time information retrieval features within Claude, enabling the model to provide up-to-date answers without relying solely on training data cutoff dates. The bot is distinct from Anthropic’s training crawler (ClaudeBot) and focuses exclusively on search functionality.

🌐 Technical Behavior

The crawler uses HTTP/1.1 and HTTP/2 protocols, sending simple GET requests for HTML pages, PDFs, and other text-based resources. It does not execute JavaScript or render pages, operating as a lightweight indexer. Anthropic’s policy documents that the bot respects Crawl-delay directives in robots.txt and defaults to a configurable request rate, typically throttled to avoid server overload. IP addresses are sourced from Anthropic’s cloud infrastructure, primarily Amazon Web Services (AWS) and Google Cloud Platform, based on observed traffic logs and community reports. The bot does not follow redirects beyond a single hop and may cache responses for short periods to reduce repeated requests.

📋 robots.txt Compliance

Anthropic explicitly states that Claude-SearchBot honors all Disallow directives in robots.txt. Site owners can block the bot entirely by adding User-agent: Claude-SearchBot Disallow: / to their robots.txt file. The policy also confirms that the bot respects Crawl-delay and Allow directives, with no documented violations of these standards as of early 2025.

🔍 Detection Indicators

The primary User-Agent string is Claude-SearchBot/1.0 (also observed as Claude-Web/1.0), followed by the comment +https://www.anthropic.com/legal/crawler-policy. The bot sends requests with a standard Accept header (text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8) and may include an X-Robots-Tag header to indicate its intention. Behavioral fingerprints include a low request rate (often one request every few seconds) and a preference for fetching resources in the en-US locale.

📊 Data Usage

Data collected by Claude-SearchBot is used exclusively to build and maintain an index for Claude’s web search feature, allowing the model to retrieve and synthesize results from live pages. Anthropic’s policy specifies that this data is not used for training foundation models unless the site owner has separately opted in to training data collection. The index is refreshed periodically, and raw page content is discarded after extraction, in compliance with Anthropic’s privacy commitments.

⚙️ Rate Limiting Policy

Although Claude-SearchBot is a legitimate, well-behaved crawler, web application operators may enforce rate limits to manage sudden bursts of requests during peak indexing cycles or to protect shared hosting environments. Rate limiting is a standard precaution against resource exhaustion, ensuring that the bot’s activity does not degrade the experience for human users while still allowing it to fulfill its search‑indexing purpose.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.