YouBot: what it is, what it does with your content, and what blocking it costs
What YouBot is
YouBot builds the retrieval index that You.com answers from. This is the category that decides whether you can be cited right now: when someone asks a question and the assistant goes looking for sources, it searches an index this crawler built. Blocking it removes you from those answers.
Operator: You.com
robots.txt token: YouBot
User-agent on the wire: not published by the operator
Category: Live retrieval / search index
What blocking it actually costs
You stop being cited in You.com's AI answers.
How to block YouBot
Add this to your robots.txt:
User-agent: YouBot
Disallow: /
The token must appear on its own User-agent: line. A named group replaces the User-agent: * group rather than adding to it, so anything you also want disallowed for this crawler has to be repeated inside its group.
How to allow YouBot
User-agent: YouBot
Allow: /
An explicit allow is worth writing even when you have no blanket block: it documents the decision, and it survives someone later adding a restrictive User-agent: * rule without thinking about AI crawlers.
robots.txt is not the only thing that can block it
A permissive robots.txt does not mean YouBot can reach you. WAF rules, Cloudflare's bot-management settings, rate limits and country blocks all sit in front of robots.txt and answer first. A site whose robots.txt welcomes YouBot and whose edge returns 403 to it is blocked in every way that matters — and nothing in robots.txt will tell you so.
This is the gap the AI Crawler Access Checker was built to close: it reads robots.txt and sends a real request carrying the crawler's user-agent, so you see what the crawler sees.
Common questions
- What user-agent does YouBot send?
You.com does not publish an exact user-agent string for YouBot. Match on the
YouBottoken in robots.txt rather than on a full string you found elsewhere.- How do I block YouBot?
Add a group to robots.txt naming the token exactly:
User-agent: YouBot Disallow: /The group must name
YouBoton its own line. AUser-agent: *group does not combine with a named one — under RFC 9309 the most specific matching group replaces the wildcard entirely, it does not inherit from it.- What does blocking YouBot cost me?
You stop being cited in You.com's AI answers.
- Can I tell a real YouBot request from a fake one?
Not reliably. You.com does not publish verified IP ranges for YouBot, so the user-agent string is the only signal, and anyone can send it. Treat robots.txt as a statement of policy rather than as enforcement.
Is YouBot blocked on your site right now?
Reading your own robots.txt only answers half of it — a firewall rule can block YouBot while robots.txt says it is welcome. The checker tests both.
Check your site free