Manus AI Agent: User Agent, robots.txt Rules & Safety Rating

Q: What user-agent string does Manus AI Agent use?

Manus AI Agent is reported to identify itself with Manus-User. That spelling comes from ai.robots.txt, not from Manus, which has not published crawler documentation naming it. Use it in robots.txt as the best available match, and treat a request carrying it as a clue rather than proof of who sent it.

Q: Is Manus AI Agent safe?

Manus AI Agent is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Manus has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Q: Will blocking Manus AI Agent hurt my SEO?

✅ No SEO Impact - Blocking Manus AI Agent does not affect your rankings in Google, Bing, or any other search engine. Manus AI Agent is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

Q: How do I block Manus AI Agent in robots.txt?

Add the following lines to your /robots.txt file: User-agent: Manus-User Disallow: / This instructs Manus AI Agent not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).

Q: How do I verify if Manus AI Agent is crawling my site?

Search your access logs for Manus-User (for example grep -i "Manus-User" /var/log/nginx/access.log). Because the operator publishes no IP ranges or reverse-DNS pattern, a match shows that something used the name, not that Manus sent it.

Quick Facts

User-Agent:: Manus-User
Category:: AI & LLM Bots
Operator:: Manus
Safety:: Safe
Blocking Impact:: Low - No SEO ranking impact
SEO Impact Score:: 2/10
Official docs:: None published by Manus
Named by:: ai.robots.txt

Reported, not operator documented

Manus has not published a crawler page that names Manus-User. It is listed here because a credible public source does: ai.robots.txt. Reported Manus agent fetcher. No vendor page.

What that means for you: the robots.txt rule on this page is the best available spelling, and a well-behaved crawler using this string will honour it, but there is no vendor statement of purpose, crawl rate or robots.txt compliance to rely on. Treat a matching request in your logs as a detection clue, not proof of who sent it, and combine the rule with a firewall rule if the traffic matters to you. If the operator publishes documentation, this profile moves to Official docs.

What is Manus AI Agent?

Manus AI Agent is an on-demand AI fetcher operated by Manus. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into Manus's assistant.

Manus AI Agent is an on-demand AI fetcher operated by Manus. It retrieves a page only when a user explicitly asks an AI assistant or agent to read, summarize, or act on a specific URL. Because it is triggered by real user intent rather than bulk crawling, blocking it mainly prevents users from pulling your content into Manus's assistant.
Manus AI Agent uses the user-agent token Manus-User. You can control it via robots.txt, meta tags (noai), or the emerging llms.txt standard. Robots.txt is voluntary; for hard enforcement, combine it with server-level IP blocking.

What happens if you block Manus AI Agent?

✅ No SEO Impact - Blocking Manus AI Agent does not affect your rankings in Google, Bing, or any other search engine. Manus AI Agent is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

Generally safe to allow; provides legitimate crawling value.

How to block Manus AI Agent with robots.txt

<code>User-agent: Manus-User</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)

User-agent: Manus-User
Disallow: /

Allow all (robots.txt)

User-agent: Manus-User
Allow: /

Block private only (robots.txt)

User-agent: Manus-User
Disallow: /private/
Disallow: /api/
Disallow: /admin/
Allow: /

Nginx server block

# Nginx: Hard-block Manus AI Agent
if ($http_user_agent ~* "Manus-User") {
    return 403 "Bot blocked";
}

Apache .htaccess

# Apache: Hard-block Manus AI Agent
SetEnvIfNoCase User-Agent "Manus-User" bad_bot
Order Allow,Deny
Allow from all
Deny from env=bad_bot

Meta robots tag

X-Robots-Tag header

X-Robots-Tag: noindex, nofollow

Is Manus AI Agent safe to allow?

Manus AI Agent is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Manus has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Manus publishes no IP ranges or reverse-DNS pattern for Manus AI Agent, so the user-agent string cannot be verified. Rate-limit unusual volume instead of trusting the name.

What does Manus AI Agent do?

Understanding Manus AI Agent's purpose helps you decide whether to allow or block it.

Fetches a page only when a user asks an AI assistant to read it
Summarizes or extracts the URL the user provided
Triggered by real user intent, not bulk crawling
Low traffic volume compared with training crawlers
Blocking it prevents users from pulling your content into the assistant

Frequently Asked Questions

What user-agent string does Manus AI Agent use?

Manus AI Agent is reported to identify itself with Manus-User. That spelling comes from ai.robots.txt, not from Manus, which has not published crawler documentation naming it. Use it in robots.txt as the best available match, and treat a request carrying it as a clue rather than proof of who sent it.

Is Manus AI Agent safe?

Manus AI Agent is rated Safe in this directory, meaning there are no credible public reports of abusive crawling under this name. It is a Reported token: Manus has not published documentation for it, so its purpose, crawl rate and robots.txt behaviour are not confirmed by the operator, and anyone can send the same user-agent string. Allow or block it on its stated purpose, and back the robots.txt rule with a firewall rule if the traffic matters to you.

Will blocking Manus AI Agent hurt my SEO?

✅ No SEO Impact - Blocking Manus AI Agent does not affect your rankings in Google, Bing, or any other search engine. Manus AI Agent is an AI crawler, not a traditional search indexer. You can freely block it via User-agent / Disallow: / without any SEO penalty.

How do I block Manus AI Agent in robots.txt?

Add the following lines to your /robots.txt file:

User-agent: Manus-User
Disallow: /

This instructs Manus AI Agent not to crawl any path on your site. To block only specific sections, replace / with the path (e.g., Disallow: /blog/).

Does Manus AI Agent respect robots.txt?

Not documented. Manus has published no statement that Manus AI Agent reads robots.txt. A rule for Manus-User will stop a client that chooses to honour it; for enforcement, add a firewall or CDN rule as well.

How do I verify if Manus AI Agent is crawling my site?

Search your access logs for Manus-User (for example grep -i "Manus-User" /var/log/nginx/access.log). Because the operator publishes no IP ranges or reverse-DNS pattern, a match shows that something used the name, not that Manus sent it.