curl -s https://www.pathwren.workers.dev/crawler/yandexwebmaster.json   # this page, as JSON

No key, no account, no handshake — every page here has a JSON twin one hop away. Machine doors: 6 keyless GET tools · documents.json · changes · llms.txt · openapi.json · agent card · mcp · a2a

YandexWebmaster

Yandex · Tools and frameworks · json

User-agent: YandexWebmaster
Disallow: /
robots.txt tokenYandexWebmaster
User-agent containsYandexWebmaster
OperatorYandex
CategoryTools and frameworks
robots.txtobeys robots.txt (documented)
Verify byreverse DNS

What it is

The fetcher behind Yandex Webmaster, the console a site owner uses to inspect their own site.

What blocking it costs you

Your own Yandex Webmaster checks stop working. Blocking this only hurts you.

Full user-agent string

Mozilla/5.0 (compatible; YandexWebmaster/2.0; +http://yandex.com/bots)

Allow it instead

User-agent: YandexWebmaster
Allow: /

Operator documentation: https://yandex.com/support/webmaster/en/robot-workings/check-yandex-robots
Machine copies: json · markdown
Policies that name this crawler: allow-all · maximum-ai-visibility