YandexDirect

Verifiable

The Yandex Advertising Network robots. YandexDirect downloads information about the content of partner sites to identify their topic categories so that relevant advertising can be matched to them, and YandexDirectDyn generates dynamic banners. Neither follows the general robots.txt rules.

Operated by Yandex · Official documentation

User agents

Patterns this directory matches, with real observed strings.

regexYandexDirect/\d
regexYandexDirectDyn/\d
observedMozilla/5.0 (compatible; YandexDirect/3.0; +http://yandex.com/bots)
observedMozilla/5.0 (compatible; YandexDirectDyn/1.0; +http://yandex.com/bots)

How to verify

Reverse-DNS check a client IP

dig -x <client-ip> +short   # expect a hostname matching *.yandex.ru

Reverse-DNS suffixes: *.yandex.ru, *.yandex.net, *.yandex.com

Good Bot Practices scorecard

Identifies honestly
Stable UA token documented (2 patterns)
Verifiable
Verifiable
Respects robots.txt
Does not honor robots.txt
Behaves
Crawl-rate behavior is operator-declared; not machine-verifiable from this dataset
Reachable operator
Operator and documentation published

Measured against the Good Bot Practices.