About this bot
YandexAdditional is associated with Yandex and is used for yandex ai content control.
The primary identity signal is YandexAdditional. Representative HTTP identity: Mozilla/5.0 (compatible; YandexAdditional/1.0; +http://yandex.com/bots).
Directory status: Active. Identity classification: Verified with High confidence. Identity type: official documented plus fcrdns.
robots.txt behavior: conditional; use the documented agent-specific controls and request context rather than assuming general rules apply.
Verification: Match the documented Yandex identity, then authenticate origin with forward-confirmed reverse DNS: the PTR hostname must end in yandex.ru, yandex.net, or yandex.com and forward-resolve to the source IP.
How to identify this bot
- User-agent and crawler identifiers
-
YandexAdditionalMozilla/5.0 (compatible; YandexAdditional/1.0; +http://yandex.com/bots) - Also known as
- YandexAdditional Yandex robot; Yandex AI control agent
Details
- Kind
- Policy agent
- Family
- Yandex
- Purpose
- Yandex AI content control
- Common Use
- YandexAdditional helps process robots controls that exclude already-indexed page content from Search with Yandex AI responses; it does not make indexing requests.
- Respects robots.txt
- Depends
Verification
- Identity Type
- official-documented-plus-fcrdns
- Evidence Method
- Match the documented Yandex identity, then authenticate origin with forward-confirmed reverse DNS: the PTR hostname must end in yandex.ru, yandex.net, or yandex.com and forward-resolve to the source IP.
- Detection Notes
- YandexAdditional helps process robots controls that exclude already-indexed page content from Search with Yandex AI responses; it does not make indexing requests. Yandex documents that many non-indexing robots may ignore general User-agent:* rules; use the exact agent group where applicable. Browser version components may change.
Website controls
- Robots.txt Snippet
User-agent: YandexAdditional Disallow: /