YandexAccessibilityBot

Safe Block: Depends Verified robots.txt: No

Yandex crawler that downloads pages to check accessibility for users.

Key facts

Operator: Yandex
Family: Yandex
Purpose: General Crawl
User-Agent: YandexAccessibilityBot
Should you block it?: Depends
Verified: Yes
Respects robots.txt: No
Identity type: Official Documented
Confidence: High
Last verified: 2026-04-01

Bot details

Identity

User-Agent: YandexAccessibilityBot
robots.txt token: YandexAccessibilityBot
HTTP user-agent: Mozilla/5.0 (compatible; YandexAccessibilityBot/3.0; +http://yandex.com/bots)
Aliases: Yandex accessibility checker

Ownership

Operator: Yandex
Family: Yandex
Type: Search
Purpose: General Crawl

Verification and trust

Source type: Official
Confidence: High
Last verified: 2026-04-01
Verification: Verify with reverse DNS and forward DNS checks; valid Yandex hosts end in yandex.ru, yandex.net, or yandex.com.
Operator URL: https://yandex.com/support/webmaster/en/robot-workings/check-yandex-robots
Source URL: https://yandex.com/support/webmaster/en/robot-workings/check-yandex-robots

Blocking and detection

Robots

User-agent: YandexAccessibilityBot
Disallow: /

Cloudflare

(http.user_agent contains "YandexAccessibilityBot")

Advanced server rules

Apache

RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} YandexAccessibilityBot [NC]
RewriteRule ^ - [F,L]

Nginx

if ($http_user_agent ~* "YandexAccessibilityBot") { return 403; }

Notes

YandexAccessibilityBot is the Yandex robot that downloads pages to check their accessibility for users. Yandex says it can ignore the general Yandex Webmaster setting and does not take general robots.txt rules into account.

Evidence and source

Verify with reverse DNS and forward DNS checks; valid Yandex hosts end in yandex.ru, yandex.net, or yandex.com.

https://yandex.com/support/webmaster/en/robot-workings/check-yandex-robots