curl -s https://www.pathwren.workers.dev/crawler/yandexrenderresourcesbot.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

YandexRenderResourcesBot

Yandex · Search engines · json

User-agent: YandexRenderResourcesBot
Disallow: /
robots.txt tokenYandexRenderResourcesBot
User-agent containsYandexRenderResourcesBot
OperatorYandex
CategorySearch engines
robots.txtignores the * group; obeys rules named for its own token
Verify byreverse DNS

What it is

Loads the CSS, JavaScript and images Yandex needs to render a page. Yandex documents the exact rule: it ignores robots.txt for a resource when the HTML page using it is allowed, and does not fetch the resource when that page is disallowed.

What blocking it costs you

Yandex renders your pages without their stylesheets or scripts and ranks what it sees. This is the classic accidental self-inflicted ranking loss.

Full user-agent string

Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots)

Allow it instead

User-agent: YandexRenderResourcesBot
Allow: /

Ask this page a question, with one GET

A question about this page, answered by a call you can make right now — no key, no account, no JSON-RPC, nothing to assemble. The query string is already filled in with this page's own subject.

curl -s 'https://www.pathwren.workers.dev/tools/verification-methods?crawler=yandexrenderresourcesbot&s=client-dossiers'

Every parameter above is a value the endpoint reads, not an address it visits: nothing is fetched on your behalf. Called without any parameter, each endpoint returns its own specification instead of an error. All of them.

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