# DuckDuckBot

> DuckDuckGo's own crawler. Note that the bulk of DuckDuckGo's web results come from Bing, so blocking bingbot removes you from DuckDuckGo whether or not you allow this one.

| field | value |
|---|---|
| operator | DuckDuckGo |
| category | Search engines |
| robots.txt token | `DuckDuckBot` |
| user-agent contains | `DuckDuckBot` |
| robots.txt | obeys robots.txt (documented) |
| verify by | published IP ranges |
| published IP ranges | https://duckduckgo.com/duckduckbot.json |
| prefixes mirrored | 486 IPv4 / 0 IPv6 |
| operator docs | https://duckduckgo.com/duckduckgo-help-pages/results/duckduckbot/ |
| last reviewed | 2026-09-14 |

## What blocking it costs you

Limited on its own; the real DuckDuckGo lever is bingbot.

## Full user-agent string

```
DuckDuckBot/1.1; (+http://duckduckgo.com/duckduckbot.html)
```

## Block it

```
User-agent: DuckDuckBot
Disallow: /
```

## Allow it

```
User-agent: DuckDuckBot
Allow: /
```

## Ask this page a question, with one GET

A question about this page, answered by a call you can make right now — no key, no account, no JSON-RPC, nothing to assemble. The query string is already filled in with this page's own subject.

- **How do I prove a request really is DuckDuckBot?**  
  `curl -s 'https://www.pathwren.workers.dev/tools/verification-methods?crawler=duckduckbot&s=client-dossiers'`  
  The verification method its operator actually publishes — published IP ranges, reverse DNS, or nothing at all — and the mirror of it on this host.
- **Is 104.43.54.127 really DuckDuckBot?**  
  `curl -s 'https://www.pathwren.workers.dev/tools/verify-crawler?ip=104.43.54.127&ua=DuckDuckBot&s=client-dossiers'`  
  That address checked against every prefix this host mirrors. 104.43.54.127 is the first address of 104.43.54.127/32, one of the ranges listed on this page — so the link is a worked example that returns a match. Swap in an address from your own log.

Every parameter above is a value the endpoint reads, not an address it visits: nothing is fetched on your behalf. Called without any parameter, each endpoint returns its own specification instead of an error.

JSON: https://www.pathwren.workers.dev/crawler/duckduckbot.json · index: https://www.pathwren.workers.dev/llms.txt