DuckDuckBot
DuckDuckGo uses this crawler to index pages that can be cited in its AI answers. DuckDuckGo's classic search crawler.
Crawler data last reviewed September 18, 2026 · all 61 crawlers
DuckDuckBot at a glance
| Operator | DuckDuckGo |
|---|---|
| Type | AI search |
| Respects robots.txt | Yes — a Disallow rule is honored |
| If you allow it | Allowing it puts your pages in the citation pool for AI answers, which is where referral traffic increasingly comes from. |
| If you block it | Blocking it removes you from that engine's answers entirely. There is no middle ground: uncrawled pages cannot be cited. |
What is DuckDuckBot?
DuckDuckGo's classic search crawler. Search crawlers build the index behind AI answer engines. When a user asks a question, the engine searches this index and cites matching pages with a link. No crawl means no citation, no link, no referral traffic — allowing search crawlers is the single highest-impact step for AI-era visibility.
Allowing it puts your pages in the citation pool for AI answers, which is where referral traffic increasingly comes from.
Does DuckDuckBot respect robots.txt?
Yes. DuckDuckBot honors robots.txt directives, including wildcard rules and Allow lines. A Disallow rule for this crawler is respected — but remember robots.txt is a voluntary protocol across the whole industry, not a wall.
How to block DuckDuckBot
Add this group to your robots.txt to deny DuckDuckBot across your whole site:
User-agent: DuckDuckBot Disallow: /
Blocking it removes you from that engine's answers entirely. There is no middle ground: uncrawled pages cannot be cited.
How to allow DuckDuckBot
DuckDuckBot is allowed by default on every site. It only gets blocked if a matching rule exists — most often a global User-agent: * group with Disallow: /. To exempt it while blocking other bots, put an empty Disallow group for it before the global block:
User-agent: DuckDuckBot Disallow: User-agent: * Disallow: /
Does blocking DuckDuckBot hurt your rankings?
Not in Google — but it does cost you AI visibility. DuckDuckBot is not used by Google Search, so classic rankings are unaffected. What changes is whether DuckDuckGo can cite your pages in AI answers. That is a separate discovery channel, and for a AI search token, blocking it removes you from it completely.
How to verify DuckDuckBot is really hitting your site
robots.txt states what a compliant crawler may fetch; your access log shows what actually happened. Search the log for the token:
grep -i "DuckDuckBot" /var/log/nginx/access.log | tail -50
On Cloudflare the free plan does not expose raw request logs, so use Security Events to see blocked requests, or add a console.log line in a Worker to record the user agent. On Vercel or Netlify, filter the request log by user agent string.
User agents are trivially spoofable, which is why "I saw DuckDuckBot in my logs" is not proof. Because DuckDuckBot is documented to honor robots.txt, a request from it that ignores your rules is worth investigating — but a single stray hit is usually a misconfigured tool, not the real crawler.
Should you block DuckDuckBot?
- Allow it — a search crawler is the only route from your site into DuckDuckGo citations, and citations are where AI referral traffic comes from.
- Do not block it casually. There is no partial state: an uncrawled page cannot be cited, and the engine will simply answer from a competitor's page.
- Review it if you recently tightened a global User-agent: * block. Global blocks are the most common reason a site silently disappears from AI answers.
Is DuckDuckBot currently allowed on your site?
Paste your robots.txt into the free auditor and see verdicts for all 61 AI crawlers — including the specific paths that matter.
Other AI crawlers from DuckDuckGo
DuckDuckGo runs 2 distinct user agents. They are configured independently in robots.txt, so blocking one does not block the others — a detail that catches people out when they assume a single rule covers a whole vendor.
| Crawler | Type | robots.txt | What it does |
|---|---|---|---|
| DuckAssistBot | AI assistant fetcher | yes | Fetches sources for DuckDuckGo Duck.ai assisted answers. |
| DuckDuckBot this page | AI search | yes | DuckDuckGo's classic search crawler. |
Related AI crawlers
Further reading
- How to Get Cited by ChatGPT, Perplexity and Copilot — ChatGPT, Perplexity and Copilot cite pages through a fetch-retrieve-extract pipeline. What each stage rewards, how the engines differ, and a 10-point checklist.
- How AI Crawlers Work (And What They Want From Your Site) — AI crawlers train models, build search indexes, or fetch pages on request. Meet the major bots, learn how they fetch pages, and why access is step zero.