Manus-User
Butterfly Effect's AI agent for web tasks
About this crawler
Manus-User is a web crawler identified by the regular-expression pattern Manus-User in the User-Agent request header. It is categorised as browser-automation. Use the regex above to detect, log, allow, or block Manus-User traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.20%
Technical details
- Name
- Manus-User
- Pattern
Manus-User- Tags
- browser-automation
- Reference
- https://knownagents.com/agents/manus-user
- Added
- 2026/04/26
- rDNS suffixes
.manus.im- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely Manus-User with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.manus.im
Sample User-Agent strings
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36; Manus-User/1.0
Block this crawler
robots.txt — disallow Manus-User:
User-agent: Manus-User
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Manus-User [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Manus-User") {
return 403;
}
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