Operated by Big Sur AI
The web crawler for Big Sur AI, an e-commerce AI platform used to gather product data and market insights.
The web crawler for Big Sur AI, an e-commerce AI platform used to gather product data and market insights.
Big Sur AI is an AI data-collection crawler operated by Big Sur AI. It harvests web content to build or expand training datasets for large language models (LLMs). Unlike search crawlers, Big Sur AI does NOT influence your page ranking in any search engine. The user-agent string Big Sur AI can be safely blocked via robots.txt, meta tags (noai), or the emerging llms.txt standard without any SEO penalty. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.
User-agent: Big Sur AI / Disallow: / without any SEO penalty. This is the recommended approach if you want to opt out of Big Sur AI's LLM training datasets.<code>User-agent: Big Sur AI</code> — Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.
Big Sur AI is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).Understanding Big Sur AI's purpose helps you decide whether to allow or block it.
Big Sur AI. This is the exact string you must use in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. User-agent matching in robots.txt is case-insensitive, but the string must be spelled correctly. You can verify that a request genuinely comes from Big Sur AI by performing a reverse-DNS lookup on the source IP — legitimate bots resolve back to their operator's domain.Big Sur AI is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).User-agent: Big Sur AI / Disallow: / without any SEO penalty. This is the recommended approach if you want to opt out of Big Sur AI's LLM training datasets./robots.txt file:
User-agent: Big Sur AI Disallow: /This instructs Big Sur AI not to crawl any path on your site. The Disallow: / directive covers the entire domain including subfolders. To only block specific sections, replace / with the path (e.g.,
Disallow: /blog/). Note: robots.txt is publicly readable — any bot or human can inspect it at yourdomain.com/robots.txt.Big Sur AI (case-insensitive grep: grep -i "Big Sur AI" /var/log/nginx/access.log). You can also check Google Search Console → Coverage → Crawl Stats for Googlebot variants. For Big Sur AI specifically, filter by user-agent in your log analysis tool (GoAccess, AWStats, etc.).User-agent: Big Sur AI Crawl-delay: 10(10 second delay between requests).
Disallow: / you can restrict Big Sur AI to specific paths:
User-agent: Big Sur AI Disallow: /private/ Disallow: /staging/ Allow: /This allows Big Sur AI everywhere except the listed paths. Path matching in robots.txt uses prefix matching —
Disallow: /private/ blocks /private/page.html but NOT /public/private/.<meta name="Big Sur AI" content="noai, noimageai, noindex"> to your pages.
2. Add a llms.txt file at your domain root (emerging standard).
3. Use Cloudflare WAF or Nginx to return 403 for this user-agent.
4. Consider IP blocklists for Big Sur AI's known crawler IP ranges.<meta name="Big Sur AI" content="noindex">
• **X-Robots-Tag HTTP header**: X-Robots-Tag: noai, noimageai
• **llms.txt**: Add a /llms.txt file (similar to robots.txt but for LLMs)
• **Server block**: Return 403 or 429 for this user-agent via WAF or Nginx
Using multiple layers provides the strongest protection.