What is DuckAssistBot?

The fetcher behind DuckDuckGo's AI-assisted answers. It reads pages live to answer a search. Intent: answer fetch. Fetches your page live to answer a user's question.

What is the DuckAssistBot user agent?

Requests from DuckAssistBot carry "duckassistbot" in the User-Agent header (matching is case-insensitive). The full string includes a version number that changes over time; DuckDuckGo's documentation lists the current one. In robots.txt, the token is DuckAssistBot.

How do I verify DuckAssistBot?

DuckDuckGo publishes the IP ranges DuckAssistBot uses. A request is real when its IP is inside that list. Paste an IP into HadoSEO's free bot verifier to check it against the published data.

How do I block DuckAssistBot in robots.txt?

Add "User-agent: DuckAssistBot" followed by "Disallow: /" to your robots.txt. robots.txt is a request, not a lock: a scraper using DuckAssistBot's name ignores it, which is why verification matters.

Can I see when DuckAssistBot visits my site?

Yes. HadoSEO logs every DuckAssistBot request by page, checks it against DuckDuckGo's published data, and flags requests that use the name from IPs DuckDuckGo doesn't own. For a one-off look, the free log file analyzer reads a week of your server logs in the browser.

[ AI answer fetcher · DuckDuckGo ]

DuckAssistBot: DuckDuckGo's AI answer fetcher.

The fetcher behind DuckDuckGo's AI-assisted answers. It reads pages live to answer a search. Its intent is answer fetch: fetches your page live to answer a user's question.

answer fetchverifiable by published IP ranges

IP ranges last updated Oct 25, 2026

Check a DuckAssistBot IP All AI crawlers

[ technical facts ]

operator: DuckDuckGo
intent: answer fetch
user agent contains: duckassistbot
robots.txt token: DuckAssistBot
verification: published IP rangesverified
official IP list: duckduckgo.com/duckassistbot.json
ranges in registry: none loaded (source unreachable at last refresh)
last updated: Oct 25, 2026
operator docs: duckduckgo.com/duckduckgo-help-pages/results/duckassistbot/

[ verify ]

How to verify a real DuckAssistBot request.

DuckDuckGo publishes the IP ranges DuckAssistBot uses. A request is real when its IP is inside that list.

01Check the User-Agent header contains "duckassistbot" (case-insensitive). That is only a claim: anyone can send it.
02Download DuckDuckGo's published list (https://duckduckgo.com/duckassistbot.json) and check the request IP falls inside one of its ranges.
03Inside the list: the real DuckAssistBot. Outside it: a request using DuckAssistBot's name from someone else's server.

Skip the lookups: the free bot verifier checks one IP against the same registry, and the log file analyzer checks every DuckAssistBot request in a week of access logs. Requests that fail are flagged as spoofed, not hidden.

[ robots.txt ]

Block or allow DuckAssistBot in robots.txt.

Add one of these groups to the robots.txt at your domain root. The token matches case-insensitively.

block DuckAssistBot

User-agent: DuckAssistBot
Disallow: /

allow DuckAssistBot

User-agent: DuckAssistBot
Allow: /

robots.txt only binds crawlers that choose to follow it. A scraper sending DuckAssistBot's user agent from its own servers won't, which is why HadoSEO checks the IP behind every request.

[ questions ]

DuckAssistBot, answered.

[ free scan ]