What is YandexAdditional?
YandexAdditional is a web crawler operated by Yandex that retrieves website content for YandexGPT quick answers in Yandex Search. You can set up Agent Analytics to see when YandexAdditional visits your website.
Category
| Example User Agent | YandexAdditional |
| Operated By | Yandex |
| Source | Official Website |
| Triggered By | Automated crawl |
| Used for AI Model Training | Not expected |
| Affects AI Chat & Search Visibility | Yes |
| Expected To Follow Robots.txt | Yes |
Why Is YandexAdditional Visiting My Website?
YandexAdditional is updating an AI search index so your pages can appear in its results. It may have discovered your site through links, a sitemap, or mentions of your domain.
Should I Block YandexAdditional?
Usually not. Blocking YandexAdditional keeps your pages out of its AI search results and can eliminate referral traffic from that channel. It does not improve traditional search rankings. For context, 8% of the top websites we track currently have robots.txt rules for YandexAdditional.
How Do I Block YandexAdditional Using Robots.txt?
Add this rule to your robots.txt file to block YandexAdditional from accessing your website, or use Automatic Robots.txt to block all AI search crawlers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: YandexAdditional # https://knownagents.com/agents/yandexadditional
Disallow: /Insights for YandexAdditional
As of November 9, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
YandexAdditional Traffic
Frequently Asked Questions
What Traffic Patterns Should I Expect From YandexAdditional?
YandexAdditional revisits your site on a flexible schedule, often requesting several pages in a burst. Activity usually increases when your content changes or its index refreshes, with quiet intervals between crawl passes.
Does YandexAdditional Follow Robots.txt Rules?
YandexAdditional is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether YandexAdditional respects it.
Is YandexAdditional Used for AI Model Training?
Not ordinarily. YandexAdditional is not categorized as an AI training scraper or data provider, so AI model training is not its expected purpose.
Does Blocking YandexAdditional Affect AI Search or Citations?
Yes. Blocking YandexAdditional can keep your pages out of the AI search index it supplies, reducing their eligibility to appear or be cited in that product's answers.
Does YandexAdditional Access Private Content?
No special access. YandexAdditional can reach only content available to anonymous visitors. Make sure staging sites and other sensitive areas require authentication.
How Can I Verify a Request From YandexAdditional?
Agent Analytics tracks YandexAdditional visits in real time. You can also check your server logs for requests whose user-agent string contains "YandexAdditional". Look for bursts that follow links across several pages and recur over time. Because YandexAdditional does not publish a verification method, any client can claim its identity and a log match is only a clue.
How Is YandexAdditional Different From Other Yandex Agents?
Yandex operates separate agents for different purposes, so each agent should be evaluated and controlled independently.
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