What is Manus-User?
Manus-User is a browser-enabled AI agent operated by Butterfly Effect, a company based in China. It autonomously navigates websites, interprets content, and carries out multi-step tasks for human users. Agent Analytics can track when it visits your website.
Overview
| Operated By | Butterfly Effect |
| Expected To Follow Robots.txt | No |
| Insights Last Updated | July 10, 2026 |
Category
Expected Behavior
Manus-User controls a real browser, so expect it to load pages, run JavaScript, keep cookies, and move through multi step flows the way a person would. Its path through your site follows whatever task it was given rather than a fixed crawl order, so visits look irregular. Sessions can pause on a page while the agent processes content, then jump somewhere unexpected.
Manus-User's User Agent
| User Agent | 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 |
How To Block Manus-User With Robots.txt
Add this rule to your robots.txt file to request that Manus-User not access your website, or use Automatic Robots.txt to request the same of all AI agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Manus-User # https://knownagents.com/agents/manus-user
Disallow: /Manus-User Global Insights
As of July 10, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
2% of top websites block Manus-User in their robots.txt files.
Overall AI Agent Traffic
0.0% of all web traffic came from AI agents.
Top Visited Website Categories
The types of websites most frequently visited by Manus-User.
Frequently Asked Questions
Should I Block Manus-User?
Usually no. Manus-User browses on behalf of a real person who is trying to read, compare, or buy something on your site. Blocking it turns away that person, not a bot farm, and they will finish the task on a competitor's site instead. Blocking it has no effect on your search rankings. For comparison, 2% of the top websites we track already have robots.txt rules for Manus-User.
Does Manus-User Respect Robots.txt?
No. Manus-User is not expected to honor robots.txt, so a disallow rule only states your preference. Enforce the block with firewall or server rules, then confirm in Agent Analytics that its requests actually stop.
Does Manus-User Access Private Content?
It can if a user gives it access. Manus-User operates a real browser session, so if someone signs in to your site through it, it sees whatever that account sees. Without credentials, it reaches only what any anonymous visitor can reach.
Why Is Manus-User Visiting My Website?
Someone gave Manus-User a task your site can help complete, like researching a product, comparing options, or filling out a form. It reached you through links and search results, the same way a person would.
How Can I Tell if Manus-User Is Visiting My Website?
Agent Analytics tracks Manus-User visits and every other known AI agent, crawler, and scraper alongside it, then authenticates each visit against Manus-User's published verification method. You can also check your server logs for requests whose user agent string contains "Manus-User". Look for sessions that browse like a person but move through pages faster than one. A log match is still not proof, because any bot can claim to be Manus-User.