Cronless
Dynamic task execution crawler without fixed scheduling
About this crawler
Cronless is a web crawler identified by the regular-expression pattern Cronless in the User-Agent request header. It is categorised as monitoring. Use the regex above to detect, log, allow, or block Cronless 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
- Cronless
- Pattern
Cronless- Tags
- monitoring
- Reference
- https://datadome.co/bots/cronless/
- Added
- 2026/04/17
- Instances
- 1 known sample(s)
Sample User-Agent strings
Cronless/2.0 (+http://cronless.com)
Block this crawler
robots.txt — disallow Cronless:
User-agent: Cronless
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Cronless [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Cronless") {
return 403;
}
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