loc.gov/programs/web-archiving
Government web archiver preserving cultural content for long-term access
About this crawler
loc.gov/programs/web-archiving is a web crawler identified by the regular-expression pattern loc\.gov\/programs\/web-archiving in the User-Agent request header. It is categorised as archiver. Use the regex above to detect, log, allow, or block loc.gov/programs/web-archiving traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- loc.gov/programs/web-archiving
- Pattern
loc\.gov\/programs\/web-archiving- Tags
- archiver
- Reference
- https://www.loc.gov/programs/web-archiving/for-site-owners
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36 (+https://www.loc.gov/programs/web-archiving/for-site-owners/)
Block this crawler
robots.txt — disallow loc.gov/programs/web-archiving:
User-agent: loc.gov/programs/web-archiving
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} loc\.gov\/programs\/web-archiving [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "loc\\.gov\\/programs\\/web-archiving") {
return 403;
}
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