special_archiver
Library of Congress web archiver
About this crawler
special_archiver is a web crawler identified by the regular-expression pattern special_archiver in the User-Agent request header. It is categorised as archiver. Use the regex above to detect, log, allow, or block special_archiver traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.26%
Technical details
- Name
- special_archiver
- Pattern
special_archiver- Tags
- archiver
- Reference
- http://www.loc.gov/webarchiving/
- Added
- 2026/05/09
- Instances
- 2 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; special_archiver/3.2.0 +http://www.loc.gov/webarchiving/notice_to_webmasters.html)
Mozilla/5.0 (compatible; special_archiver/3.3.0 +http://www.loc.gov/webarchiving/notice_to_webmasters.html)
Block this crawler
robots.txt — disallow special_archiver:
User-agent: special_archiver
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} special_archiver [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "special_archiver") {
return 403;
}
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