WinHTTP
Windows HTTP services
About this crawler
WinHTTP is a web crawler identified by the regular-expression pattern [Ww]inHTTP in the User-Agent request header. It is categorised as http-library. Use the regex above to detect, log, allow, or block WinHTTP traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- WinHTTP
- Pattern
[Ww]inHTTP- Tags
- http-library
- Reference
- https://docs.microsoft.com/en-us/windows/win32/winhttp/about-winhttp
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
WinHTTP/1.1
Block this crawler
robots.txt — disallow WinHTTP:
User-agent: WinHTTP
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} [Ww]inHTTP [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "[Ww]inHTTP") {
return 403;
}
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