`YandexRCA`

Yandex says YandexRCA collects data for generating previews. The robot list says it does not take the general rules in robots.txt into account. The robot list says an agreement between Yandex and the site owner can override some robots.txt restrictions. This check does not apply that agreement.

robots.txt token: YandexRCA
Operator: Yandex
Kind: search
robots.txt: ignores_star. The vendor says this robot does not take the general User-agent: * rules in robots.txt into account.
HTTP user-agent: Mozilla/5.0 (compatible; YandexRCA/1.0; +http://yandex.com/bots) The table publishes this string.
IP list: None on the cited page. This page says the IP list is not disclosed.
Source: How to check that a robot belongs to Yandex. Retrieved 2026-10-18.

JSON

curl -s https://whosthatbot.com/v1/crawlers/yandexrca

Check this token

tools/call with name check_robots is the same check at POST /mcp. The pasted file disallows YandexRCA on /docs and allows *. The call does not fetch a host.

curl -s https://whosthatbot.com/mcp -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_robots","arguments":{"robots_txt":"User-agent: YandexRCA\nDisallow: /\n\nUser-agent: *\nAllow: /\n","path":"/docs","ids":["yandexrca"]}}}'

That call returns fetched_target false. This row is disallow via group YandexRCA, rule Disallow: /.