[AI crawlers](https://www.crawlreadiness.com/crawlers) · Yandex AI · AI answers · Counted in the score

# YandexAdditionalBot

YandexAdditionalBot is Yandex AI's ai answers crawler token. Blocking it costs points in the AI readiness score. 8.4% of the top 1,000 websites with a robots.txt block it.

The same control as YandexAdditional under the name Yandex's example uses; either token works.

## Where this comes from

- **Documented by the vendor.** Source: [yandex.com](https://yandex.com/support/webmaster/en/yandex-ai)
- **Honours robots.txt.**
- **Counted in the readiness score.** It can keep a site out of AI search or answers, so a block costs points.

## In the top 1,000 websites

- **8.4% block it in robots.txt** (48 of the 569 sites with a robots.txt), as of 2026-10-12.
- Method, limits and the full data: [the October 2026 study of the top 1,000 websites](https://www.crawlreadiness.com/research/ai-crawler-access-october-2026).

## What blocking it costs

Yandex AI says this token controls more than training, so a block can keep your pages out of its answers or product features. The score counts it, so a block costs points.

## The robots.txt lines

To let it in (a group that names the crawler replaces any wildcard rules for it, so this also lifts a `User-agent: *` block):

```
User-agent: YandexAdditionalBot
Allow: /
```

To keep it out:

```
User-agent: YandexAdditionalBot
Disallow: /
```

A rule in robots.txt is a request. Yandex AI says this crawler honours it. The [robots.txt generator](https://www.crawlreadiness.com/tools/robots-txt) writes a whole file with the same split: block the training crawlers, keep the search and answer crawlers.

## Also from [Yandex AI](https://www.crawlreadiness.com/crawlers/vendor/yandex-ai)

- [`YandexAdditional`](https://www.crawlreadiness.com/crawlers/yandexadditional) · AI answers

## Does YandexAdditionalBot get through on your site?

[Run the free check](https://www.crawlreadiness.com/): it reads your robots.txt against all 51 crawlers and tells you which ones can read you, and what to change.

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Source: https://www.crawlreadiness.com/crawlers/yandexadditionalbot