`YandexOntoDBAPI`

Yandex says YandexOntoDBAPI is the information card robot that downloads dynamic data. The robot list says it does not take the general rules in robots.txt into account. YandexOntoDB is a different token and does take those general rules 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: YandexOntoDBAPI
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; YandexOntoDBAPI/1.0; +http://yandex.com/bots) The table publishes this string. YandexOntoDB is a different token on the previous row.
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/yandexontodbapi

Check this token

tools/call with name check_robots is the same check at POST /mcp. The pasted file disallows YandexOntoDBAPI 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: YandexOntoDBAPI\nDisallow: /\n\nUser-agent: *\nAllow: /\n","path":"/docs","ids":["yandexontodbapi"]}}}'

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