Safe Official docs Search Engines

Yandex User Proxy

Operated by Yandex

Quick Facts

User-Agent:
YandexUserproxy
Category:
Search Engines
Operator:
Yandex
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10
Official docs:
yandex.com

Confirmed by the operator

Yandex names YandexUserproxy on its own documentation page, linked above. The token, purpose and robots.txt behaviour on this profile come from that page, re-checked on September 22, 2026.

What is Yandex User Proxy?

Yandex User Proxy is an on-demand AI fetcher operated by Yandex. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into Yandex's assistant.

Yandex User Proxy is an on-demand AI fetcher operated by Yandex. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into Yandex's assistant.
Yandex User Proxy uses the user-agent token YandexUserproxy. You can control it via robots.txt, meta tags (noai), or the emerging llms.txt standard. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.

What happens if you block Yandex User Proxy?

🔶 AI Visibility Trade-off - Blocking Yandex User Proxy will not hurt Google or Bing rankings, but it can remove your content from AI search answers and assistant citations powered by this crawler. Block only if you have a deliberate reason.
Generally safe to allow; provides legitimate crawling value.

How to block Yandex User Proxy with robots.txt

<code>User-agent: YandexUserproxy</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)
User-agent: YandexUserproxy Disallow: /
Allow all (robots.txt)
User-agent: YandexUserproxy Allow: /
Block private only (robots.txt)
User-agent: YandexUserproxy Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block Yandex User Proxy if ($http_user_agent ~* "YandexUserproxy") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block Yandex User Proxy SetEnvIfNoCase User-Agent "YandexUserproxy" bad_bot Order Allow,Deny Allow from all Deny from env=bad_bot
Meta robots tag
<meta name="robots" content="noindex, nofollow">
X-Robots-Tag header
X-Robots-Tag: noindex, nofollow

Is Yandex User Proxy safe to allow?

Yes, Yandex User Proxy is a safe and legitimate crawler operated by Yandex. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Verify by reverse-DNS lookup: legitimate Yandex User Proxy requests resolve to Yandex's domain.

What does Yandex User Proxy do?

Understanding Yandex User Proxy's purpose helps you decide whether to allow or block it.

  • Fetches a page only when a user asks an AI assistant to read it
  • Summarizes or extracts the URL the user provided
  • Triggered by real user intent, not bulk crawling
  • Low traffic volume compared with training crawlers
  • Blocking it prevents users from pulling your content into the assistant

Frequently Asked Questions

What is the official user-agent string for Yandex User Proxy?
The official user-agent string for Yandex User Proxy is: YandexUserproxy. Use this exact string in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. Matching in robots.txt is case-insensitive. Verify a request genuinely comes from Yandex User Proxy by performing a reverse-DNS lookup on the source IP.
Is Yandex User Proxy safe?
Yes, Yandex User Proxy is a safe and legitimate crawler operated by Yandex. It follows the Robots Exclusion Protocol (RFC 9309) and can be controlled with standard robots.txt rules.
Will blocking Yandex User Proxy hurt my SEO?
🔶 AI Visibility Trade-off - Blocking Yandex User Proxy will not hurt Google or Bing rankings, but it can remove your content from AI search answers and assistant citations powered by this crawler. Block only if you have a deliberate reason.
How do I block Yandex User Proxy in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: YandexUserproxy
Disallow: /

This instructs Yandex User Proxy not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does Yandex User Proxy respect robots.txt?
Yandex User Proxy is operated by Yandex and is expected to fetch and parse /robots.txt before crawling, following RFC 9309. For hard enforcement, combine robots.txt with server-level IP or user-agent blocking.
How do I verify if Yandex User Proxy is crawling my site?
Search your web server access logs for the string YandexUserproxy (case-insensitive: grep -i "YandexUserproxy" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

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