# YandexAdditional

> The token that controls whether already-indexed pages may appear in Search with Yandex AI answers. Yandex's table says it makes no indexing requests of its own — it exists so a site can opt out of the generative answer without leaving the index.

| field | value |
|---|---|
| operator | Yandex |
| category | AI training crawlers |
| robots.txt token | `YandexAdditional` |
| user-agent contains | `YandexAdditional` |
| robots.txt | ignores the * group; obeys rules named for its own token |
| verify by | reverse DNS |
| published IP ranges | none published |
| prefixes mirrored | 0 IPv4 / 0 IPv6 |
| operator docs | https://yandex.com/support/webmaster/en/robot-workings/check-yandex-robots |
| last reviewed | 2026-09-01 |

## What blocking it costs you

You disappear from Yandex's AI answers while staying in Yandex Search. This is Yandex's equivalent of Google-Extended, and it is the cheap opt-out most people are looking for.

## Full user-agent string

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

## Block it

```
User-agent: YandexAdditional
Disallow: /
```

## Allow it

```
User-agent: YandexAdditional
Allow: /
```

JSON: https://www.pathwren.workers.dev/crawler/yandexadditional.json · index: https://www.pathwren.workers.dev/llms.txt