MistralAI-User: Mistral's on-demand fetcher
Mistral's fetcher for user actions in Vibe: when a user asks a question, it may visit a page to answer and link to it.
- Free, no account.
- A few seconds.
- Nothing is stored.
MistralAI-User at a glance
Everything Mistral documents about it, with links to the source.
- Operator
- Mistral
- Type
- Fetches on a user's request
- Used for
- Pages a Vibe user's question leads it to
- Obeys robots.txt
- Yes. Mistral documents that MistralAI-User follows robots.txt, so a rule for its token is honoured.
- robots.txt token
MistralAI-User- User-agent string
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-User/1.0; +https://docs.mistral.ai/robots)
- IP addresses
- mistral.ai/mistralai-user-ips.json
- Documentation
- docs.mistral.ai/robots
How to block MistralAI-User
Opens a page because a person asked an assistant to read it. Blocking it stops those visits for the operators that honour robots.txt. Several say they may not, so a firewall rule is the real block.
Block the whole site
Add this group to robots.txt at the root of your site.
User-agent: MistralAI-User Disallow: /
Block only some paths
List the paths; everything else stays open to MistralAI-User.
User-agent: MistralAI-User Disallow: /private/ Disallow: /drafts/
How to verify MistralAI-User
Anyone can send a crawler's user-agent string. Where the request comes from is what proves it.
- 1
Find requests whose user agent contains "MistralAI-User" in your server or CDN logs.
- 2
Check each source IP against Mistral's published list (mistral.ai/mistralai-user-ips.json). A request from outside it is not MistralAI-User, whatever it says.
- 3
Block what fails the check at the firewall. A robots.txt rule only reaches crawlers that choose to read it.
Other crawlers from Mistral
Each has its own token, and blocking one leaves the others untouched.
Frequently asked questions
Mistral's fetcher for user actions in Vibe: when a user asks a question, it may visit a page to answer and link to it. Mistral says it is not used for automatic crawling or for AI training.
Yes. Mistral documents that MistralAI-User follows robots.txt, so a rule for its token is honoured.
Add a group for its token to robots.txt at the root of your site: "User-agent: MistralAI-User" followed by "Disallow: /". To close only part of the site, list those paths instead of "/". To enforce the block rather than request it, deny the IP addresses Mistral publishes at your firewall.
It should not: Mistral documents that MistralAI-User follows robots.txt. Check the rule with our tester, and remember that anyone can send its user-agent string; compare the request's IP with Mistral's published list.
Checked against Mistral's documentation on 29 September 2026.
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