YandexVertis
Yandex operates YandexVertis, which its documentation describes as the search verticals robot. It uses the YandexVertis token, honors robots.txt and takes general robots.txt rules into account. No IP range file is documented; site owners verify visits by reverse DNS to a hostname ending in yandex.ru, yandex.net or yandex.com with forward confirmation, or with the Yandex Webmaster IP check tool.
Mozilla/5.0 (compatible; YandexVertis/3.0; +http://yandex.com/bots)What YandexVertis does
In logs the bot appears as Mozilla/5.0 (compatible; YandexVertis/3.0; +http://yandex.com/bots). Yandex's documentation describes it in three words as the search verticals robot and gives no further detail about which verticals it feeds or what content it fetches. Yandex's robots page gives the user agent string and the robots.txt behaviour, plus the DNS verification method shared by all Yandex robots, and nothing else about this bot. Site owners who want more than that label will not find it in the operator's documentation.
Yandex states that YandexVertis takes general robots.txt rules into account. A Disallow addressed to YandexVertis blocks it, and a general User-agent: * rule applies as well. Allowing it keeps a site available to whatever Yandex search verticals the robot supplies, and blocking it withdraws the site from them. The documentation does not say whether the bot executes JavaScript, and it gives no IP range file for the bot, so verification depends on DNS rather than on a downloadable list.
Operator note. It takes into account the general rules in robots.txt.
Controlling YandexVertis with robots.txt
Use the token YandexVertis in robots.txt. Yandex documents that YandexVertis honors robots.txt directives.
User-agent: YandexVertis
Disallow: /User-agent: YandexVertis
Allow: /Verifying a request is really YandexVertis
Anyone can put YandexVertis in a User-Agent header. Reverse DNS lookup on the requesting IP must return a host ending in yandex.ru, yandex.net or yandex.com, and a forward DNS lookup of that host must return the same IP. Yandex Webmaster also provides an IP address check tool.
host <request-ip>
# expect a hostname ending in yandex.ru, yandex.net, yandex.com
host <that-hostname>
# expect it to resolve back to <request-ip>Common questions
How do I verify YandexVertis?
Run a reverse DNS lookup on the source IP and confirm the hostname ends in yandex.ru, yandex.net or yandex.com, then run a forward lookup on that hostname and confirm it returns the same IP. Yandex also has an IP address check tool in Yandex Webmaster. No IP range file is documented for this bot.
Does YandexVertis obey robots.txt?
Yes. Yandex documents that YandexVertis honors robots.txt and takes general robots.txt rules into account, so both a group addressed to YandexVertis and a User-agent: * group control it. The documentation lists no exceptions.
What does YandexVertis crawl?
The operator's documentation says only that it is the search verticals robot. Yandex does not list the verticals or the content types it fetches, so nothing more than the label the operator gives can be stated.
Sources
Every fact on this page was checked against Yandex's own documentation, listed below, and re-checked by a second reviewer before publication. Reviewed September 2026.
Related crawlers
This registry documents how operators describe their own bots so site owners can identify and control them. It does not publish third-party IP lists or guess at undocumented behaviour. To see how your own site responds to automated visitors, the bot detection scanner reads a URL's live response and names the protection it finds.