DuckDuckBot
DuckDuckGo · Search indexes · User agent + IP range
About this crawler
DuckDuckGo's crawler for its search results.
Usually means: The page is being discovered or refreshed so it can appear in search or AI search results.
User agent
DuckDuckBot
MetricRaven matches this token anywhere in the request's user agent, ignoring case. Operators add version numbers and browser text around it, for example "DuckDuckBot/1.0".
IP verification
Verified when the user agent and the IP range both match
1User agent
The request's user agent contains
DuckDuckBot.2Request IP
Your server-side tracker sends the IP that made the request.
3Range check
The IP is compared with the ranges DuckDuckGo publishes, refreshed twice a day.
Range sources
DuckDuckBot IP addresses
Control it in robots.txt
User-agent: DuckDuckBot Disallow: /private/
Well-behaved crawlers re-read robots.txt within a day or so.
Questions
- What is DuckDuckBot?
- DuckDuckGo's crawler for its search results. MetricRaven groups it under Search indexes: search engines and AI search keeping their index fresh.
- How do I verify that a request really comes from DuckDuckBot?
- Check both the user agent and the IP. Requests from DuckDuckBot contain "DuckDuckBot" in the user agent and come from the IP ranges DuckDuckGo publishes (https://duckduckgo.com/duckduckbot.json). A request with the name but another IP is likely spoofed.
- How do I block or allow DuckDuckBot?
- Add a robots.txt group for "DuckDuckBot" with the paths to allow or disallow. Fetchers that act for a user may ignore robots.txt; block those at your server or firewall instead.
- How can I see when DuckDuckBot visits my website?
- Most crawlers never run JavaScript, so browser analytics miss them. MetricRaven's @metricraven/ai-crawl package reports crawler requests from your server, verifies their IPs against published ranges, and shows which pages each crawler reads.
See when AI assistants and crawlers read your site
Add one line to your server and MetricRaven shows which assistants, search engines and training crawlers request your pages, which ones are IP-verified, and the URLs they expected to find, including 404s.