Safe Official docs Search Engines

Yandex RCA

Operated by Yandex

Quick Facts

User-Agent:
YandexRCA
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 YandexRCA 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 RCA?

Yandex RCA is an AI search-index crawler operated by Yandex. It collects and indexes web content so it can be surfaced as citations or answers inside Yandex's AI search experience. Allowing Yandex RCA can increase your visibility in AI-powered search results, which is why most sites choose to permit it.

Yandex RCA is an AI search-index crawler operated by Yandex. It collects and indexes web content so it can be surfaced as citations or answers inside Yandex's AI search experience. Allowing Yandex RCA can increase your visibility in AI-powered search results, which is why most sites choose to permit it.
Yandex RCA uses the user-agent token YandexRCA. 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 RCA?

🔶 AI Visibility Trade-off - Blocking Yandex RCA 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 RCA with robots.txt

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

Block completely (robots.txt)
User-agent: YandexRCA Disallow: /
Allow all (robots.txt)
User-agent: YandexRCA Allow: /
Block private only (robots.txt)
User-agent: YandexRCA Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block Yandex RCA if ($http_user_agent ~* "YandexRCA") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block Yandex RCA SetEnvIfNoCase User-Agent "YandexRCA" 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 RCA safe to allow?

Yes, Yandex RCA 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 RCA requests resolve to Yandex's domain.

What does Yandex RCA do?

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

  • Indexes web pages for AI-powered search answers
  • Surfaces your content as citations inside AI search results
  • Builds a knowledge index used to answer user questions
  • Allowing it can increase visibility in AI search
  • Respects robots.txt directives

Frequently Asked Questions

What is the official user-agent string for Yandex RCA?
The official user-agent string for Yandex RCA is: YandexRCA. 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 RCA by performing a reverse-DNS lookup on the source IP.
Is Yandex RCA safe?
Yes, Yandex RCA 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 RCA hurt my SEO?
🔶 AI Visibility Trade-off - Blocking Yandex RCA 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 RCA in robots.txt?
Add the following lines to your /robots.txt file:
User-agent: YandexRCA
Disallow: /

This instructs Yandex RCA not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).
Does Yandex RCA respect robots.txt?
Yandex RCA 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 RCA is crawling my site?
Search your web server access logs for the string YandexRCA (case-insensitive: grep -i "YandexRCA" /var/log/nginx/access.log). Filter by user-agent in your log analytics tool (GoAccess, AWStats, etc.).

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