What is MistralAI-Index?
It crawls the web to index content for Mistral search, which helps answer questions in Vibe. Mistral says this content is not used for generative AI training.
Indexes pages so an AI search product can cite and link them in answers. Blocking it usually means you stop showing up as a source there.
MistralAI-Index user agent
Mistral AI documents this user agent for MistralAI-Index. Version numbers in it change over time, so match on the name, not the whole string.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-Index/1.0; +https://docs.mistral.ai/robots)Should you block MistralAI-Index?
Usually allow it. It is how an AI search product finds pages to cite and link, so blocking it trades away being a source in those answers.
How to block MistralAI-Index in robots.txt
Add a group for its token to robots.txt at the root of your site.
A bot follows only the group that names it, so it ignores your User-agent: * rules once it has a group of its own. Repeat any paths you also want kept from it there.
User-agent: MistralAI-Index
Disallow: /How to verify a request is really MistralAI-Index
Anyone can send any user agent, so the string alone proves nothing.
Mistral AI publishes the IP ranges MistralAI-Index crawls from. A request that claims to be MistralAI-Index from any other address is not MistralAI-Index.
See when MistralAI-Index reads your site
Bots don’t run JavaScript analytics, so a script tag never sees them. invisit records crawler reads on the server instead, through its server SDK or a Cloudflare Worker, and shows which bots read which pages, next to your visitors.
Checked against Mistral AI’s own documentation on . Something changed? Write to help@invisit.dev.