How to Block DuckAssistBot

Complete guide to blocking DuckAssistBot (DuckDuckGo) from crawling your website using robots.txt, server configuration, and Switch workflows.

Operated by DuckDuckGoAI Assistants

Should You Block DuckAssistBot?

Blocking DuckAssistBot prevents your content from appearing in DuckDuckGo's AI-generated answers. Each visit from this agent represents a real user asking about your content.

Consider allowing DuckAssistBot for visibility, or use Switch to serve agent-optimized markdown content instead of blocking entirely.

Blocking Methods

1robots.txt

High for cooperative crawlers

Add a Disallow rule for DuckAssistBot's user-agent string in your robots.txt file. This is the standard, cooperative method that well-behaved crawlers respect.

2Server-side UA filtering

High

Configure your web server (nginx, Apache, Cloudflare) to reject requests matching DuckAssistBot's user-agent patterns. This blocks at the network level before your application processes the request.

3Switch Journey Workflows

Highest — granular, real-time control

Create a custom journey in Switch that detects DuckAssistBot and routes it to a block action, challenge, redirect, or modified content — without touching your server configuration.

robots.txt — Block DuckAssistBot

Add the following to your robots.txt file (at the root of your domain) to block DuckAssistBot:

User-agent: DuckAssistBot
Disallow: /

robots.txt — Allow with Restrictions

Alternatively, allow DuckAssistBot on most pages while blocking specific directories:

User-agent: DuckAssistBot
Disallow: /private/
Allow: /

DuckAssistBot User-Agent Strings

Use these patterns to identify DuckAssistBot in your server logs or firewall rules:

DuckAssistBot

Frequently Asked Questions

Does blocking DuckAssistBot affect my Google search rankings?

No. Blocking DuckAssistBot does not affect your Google search rankings. Only blocking Googlebot impacts Google Search visibility.

Does DuckAssistBot respect robots.txt?

Yes, DuckAssistBot respects robots.txt directives. Adding a Disallow rule for its user-agent will prevent it from crawling blocked paths.

Can I allow DuckAssistBot on some pages but not others?

Yes. Use robots.txt to disallow specific directories, or use Switch journey workflows for granular page-level control with conditional logic.

Go beyond robots.txt

Switch detects DuckAssistBot in real-time and lets you build custom journey workflows — block, challenge, redirect, or serve modified content. No server changes required.

Get Started Free
DuckAssistBot Profile Agents Directory