Bot intelligence record

YandexAdditional

Review first

Use the YandexAdditional identifier to separate Yandex search indexing or content discovery traffic from normal visitor requests in server logs.

Search Indexing Official Documented Confidence: High Verified: Yes robots.txt: No
Operator
Yandex
Family
Yandex
Type
Search
Source type
Official
Last checked
2026-05-20

User-Agent Pattern

Yandex
YandexAdditional
Verification note

User-agent strings are identification signals, not proof of identity. Confirm important allow, block, or rate-limit decisions with logs, DNS or IP evidence, request behavior, or operator documentation when available.

Robots.txt Snippet

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User-agent: YandexAdditional Disallow: /

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Handling Guidance

Depends

Use this record as bot intelligence, then verify the request source and behavior before allowing, blocking, or rate limiting.

Search indexing, content discovery, rendering, or search-result freshness checks.

Record Details

Structured data
Operator
Yandex
Family
Yandex
Type
Search
Purpose
Indexing
Identity type
Official Documented
Confidence
High
Last verified
2026-04-29
Last checked
2026-05-20
Source type
Official
Verification
Verify with reverse DNS and forward DNS checks; valid Yandex hosts end in yandex.ru, yandex.net, or yandex.com.
Spoofing risk
Yandex user-agent strings are often spoofed. Verify the source host with reverse DNS and forward DNS before allow-listing.

Notes

YandexAdditional is listed in the Botcrawl directory as a search crawler from Yandex. The primary identifier for log review is YandexAdditional.

Identification

  • User-agent pattern: YandexAdditional
  • Family: Yandex
  • Type: Search
  • Kind: Crawler

Common use

Search indexing, content discovery, rendering, or search-result freshness checks.

Verification and handling

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

Directory guidance marks the risk level as Neutral and the blocking decision as Depends. Do not rely on the user-agent string alone because user-agent strings can be copied or spoofed.

Robots.txt handling: No.

Evidence and Source

  • Verify with reverse DNS and forward DNS checks; valid Yandex hosts end in yandex.ru, yandex.net, or yandex.com.
  • Match `YandexAdditional` as a case-insensitive substring in HTTP user-agent logs. Review bot_aliases for alternate names or product labels. Use bot_http_agent for full user-agent examples when the client sends a longer browser-like string. Do not treat a user-agent match alone as proof of identity for allow-listing.
  • Search indexing, content discovery, rendering, or search-result freshness checks.
  • Yandex user-agent strings are often spoofed. Verify the source host with reverse DNS and forward DNS before allow-listing.

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

Same family: Yandex

YandexVideoParser Safe

YandexVideoParser

YandexVideoParser is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: No Block: Depends Official Documented
YandexVideo Safe

YandexVideo

YandexVideo is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: Yes Block: Depends Official Documented
YandexVerticals Safe

YandexVerticals

YandexVerticals is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: Yes Block: Depends Official Documented
YandexUserproxy Safe

YandexUserproxy

YandexUserproxy is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search
Verified robots.txt: No Block: Depends Official Documented

Same operator: Yandex

YandexVertis Safe

YandexVertis

YandexVertis is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: Yes Block: Depends Official Documented
YandexWebmaster Safe

YandexWebmaster

YandexWebmaster is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: Yes Block: Depends Official Documented
YandexSpravBot Safe

YandexSpravBot

YandexSpravBot is a search crawler from Yandex used for search indexing, page discovery, or content rendering.

Operator and family: Yandex Type: Search Purpose: Indexing
Verified robots.txt: Yes Block: Depends Official Documented
YandexTracker Safe

YandexTracker

YandexTracker is a monitoring bot from Yandex used to check website availability, performance, or page health.

Operator and family: Yandex Type: Monitoring
Verified robots.txt: No Block: Depends Official Documented

Similar purpose: Indexing

YouBot Safe

YouBot

YouBot is a search crawler associated with You.com, used for search indexing and content discovery.

Operator: You.com Family: YouBot Type: Search Purpose: Indexing
Verified robots.txt: No Block: Depends Verified Bot
ZoominfoBot Safe

ZoomInfo

Zoominfobot is an indexing robot for a web search engine, similar to Google. Created by Zoom Information Inc.(www.zoominfo.com), Zoominfobot’s patented technology continually scans millions.

Operator and family: ZoomInfo Type: Search Purpose: Indexing
Verified robots.txt: No Block: Depends Verified Bot
ZumBot Safe

ZumBot

ZumBot is a web crawler that indexes webpages for Zum Open Internet Search.

Operator and family: Zum Internet Corp Type: Search Purpose: Indexing
Verified robots.txt: No Block: Depends Verified Bot
Yeti Safe

Yeti

Yeti is the web crawler for Naver, a South Korean search engine. It indexes websites to provide search results and power other services on the Naver platform.

Operator and family: Naver Type: Search Purpose: Indexing
Verified robots.txt: No Block: Depends Verified Bot

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