Manus Bot: Robots.txt & Crawl Policy Reference

AI Summary: Manus Bot is the background crawler used by Manus AI, an autonomous agent system. It fetches and indexes web content to support the agent's ability to execute complex workflows and tasks.

Role and policy boundary

Manus Bot operates to gather context and data needed by the Manus action engine. While it supports an AI assistant, it acts as a general fetcher to provide the AI with necessary information to complete user-assigned tasks, such as market research or data aggregation.

A robots rule is a declaration of intent; it does not replace authentication, authorization, or rate limiting. Start with a dedicated group:

User-agent: manus-bot
Allow: /
Disallow: /staging/
Disallow: /internal/

To stop access for the entire site, use:

User-agent: manus-bot
Disallow: /

Avoid assuming that User-agent: * expresses the same business intent. A wildcard can affect assistant and training crawlers too, and it makes later audits harder because the source of the decision is less specific.

Layered verification

Verify the same URL through each control plane instead of assuming that one green signal represents the whole request path. Compare the bot-specific robots group, the page-level metadata, and the response headers captured at the public edge.

To control Manus Bot's access to your site, target its User-Agent in your robots.txt. Blocking this bot will prevent Manus AI from autonomously gathering data from your domain when executing background tasks.

The Policy Engine evaluates the selected user-agent, path scope, and the other supplied layers independently. It can therefore explain why a bot is allowed while another is blocked, rather than returning one blended website score.

Page-level directives can still override the intended outcome for indexing:

<meta name="robots" content="noindex, nofollow">

X-Robots-Tag: noindex, nofollow

If a response uses these tags, the report marks the result as blocked or conflicting even if the crawler-specific robots group is permissive. This is especially important for canonical pages served through an edge cache where headers may differ from the origin response.

WAF and Nginx remediation examples

To block Manus Bot at the network layer, you can use a WAF rule:

{
  "description": "Block Manus Bot",
  "expression": "lower(http.user_agent) contains \"manus-bot\"",
  "action": "block"
}

Use your platform's actual middleware response pattern rather than copying this simplified example without review. Never place a secret, verification token, or internal policy identifier in a public response header.

map $http_user_agent $block_manus_bot_private {
    default 0;
    ~*manus-bot 1;
}

server {
    location ~ ^/(admin|account|private|licensed|internal|api)/ {
        if ($block_manus_bot_private) { return 403; }
        try_files $uri $uri/ =404;
    }
}

Review checklist

Use this checklist after every policy change and after a CDN or WAF migration. Record the request URL, User-Agent, HTTP status, final redirect, and the exact evidence used to reach the decision.

Verify that the dedicated group appears before relying on a wildcard, test a representative public and private path, and compare live response headers with robots.txt. Keep the policy close to the content owner's intent and record whether the site wants discovery, citation, or no access at all.

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