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AI answer

DuckAssistBot

DuckDuckGoHonours robots.txt

Supports DuckDuckGo's AI-assisted answers. Modest volume, privacy-conscious audience.

User-agent string

Mozilla/5.0 (compatible; DuckAssistBot/1.0; +https://duckduckgo.com/duckassistbot)

How to verify it

DuckDuckGo published ranges.

What blocking costs

Modest volume, privacy-conscious audience.

robots.txt rule

# Block DuckAssistBot
User-agent: DuckAssistBot
Disallow: /

# Allow everything else
User-agent: *
Allow: /

Robots.txt is enough

DuckDuckGo documents DuckAssistBot as honouring robots.txt. Verify with your logs after deploying — a spoofed agent will keep coming.

Generate a full robots.txt

Pick which AI crawlers to allow or block across all 42 agents and copy the file out.

Open the generator →