MistralAI-Index (Mistral AI): what it is and how to allow or block it

Q: How do I block MistralAI-Index?

Add a group to the robots.txt at the root of your domain: User-agent: MistralAI-Index followed by Disallow: /. A group that names the bot overrides a general User-agent: * group. Mistral AI documents nothing about robots.txt for this agent, so we cannot promise it is honored.

Updated 2026-10-30 · checked against the operator's documentation on 2026-10-30

MistralAI-Index is Mistral's crawler that indexes pages for Mistral search, which Vibe uses for answers. Verify it against Mistral's published IP list; block it to stay out of that index. Its robots.txt token is MistralAI-Index.

Facts

Operator: Mistral AI

Category: AI search crawler

robots.txt token: MistralAI-Index

Honors robots.txt?: Token documented by Mistral. Mistral lists MistralAI-Index among the robots.txt tags it uses for site owners. Its page states no crawl-delay or other detail.

User-agent example: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-Index/1.0; +https://docs.mistral.ai/robots)

Official source: Mistral AI: Mistral crawlers

Published IP ranges: https://mistral.ai/mistralai-index-ips.json

Compared with the source: 2026-10-30

What it is used for

Per Mistral, MistralAI-Index is for automated crawling of the web for indexing purposes only: it indexes content for Mistral search, which helps answer user questions in Vibe. Mistral says the crawled content is not used for generative AI training of any kind.

Builds the index an AI assistant searches when it answers. Blocking it can keep you out of that assistant's answers.

What happens if you block it

Your pages can drop out of Mistral search, the index Vibe uses to answer questions. Training is governed by a separate tag, MistralAI-Training.

Is it really MistralAI-Index?

Anyone can send MistralAI-Index as a user agent, so a log line proves nothing by itself. The way to tell is the requesting IP address.

Compare the IP address with the Mistral AI: published IP ranges. A request from outside those ranges is not the operator's crawler.
Guide: How to block AI crawlers in robots.txt: tokens for training, search and user requests.
Guide: How to let AI assistants read your site (and which bots to block).
Guide: Do ChatGPT, Claude and Gemini obey your robots.txt? What operators document, and a test for your logs.
Paste any user agent from your logs into the user-agent lookup, or follow the scripts in Fake Googlebots and PHP scanners.

How to allow or block MistralAI-Index

Add one of these groups to the robots.txt at the root of your domain. A group that names the bot overrides a general User-agent: * group.

Allow MistralAI-Index

User-agent: MistralAI-Index
Allow: /

Block MistralAI-Index

User-agent: MistralAI-Index
Disallow: /

Does your site allow MistralAI-Index today? The checker evaluates your robots.txt for this and every other bot.Check my site

What we see on this site

No request identifying as MistralAI-Index has been recorded since 19 Oct, so there is nothing to show yet. We never fill this in with estimates.

Counts come from this site's own server; they hold no IP addresses or URLs, and a user agent is only a claim. See the bot traffic data and the methodology.

Questions about MistralAI-Index

What is MistralAI-Index?

Mistral's crawler that indexes web pages for Mistral search, which helps Vibe answer questions. Per Mistral, MistralAI-Index is for automated crawling of the web for indexing purposes only: it indexes content for Mistral search, which helps answer user questions in Vibe. Mistral says the crawled content is not used for generative AI training of any kind.

Is MistralAI-Index safe and legitimate?

The real MistralAI-Index is an AI search crawler run by Mistral AI. A user-agent string is only a claim, though, so anyone can send it. Compare the requesting IP address with the published IP ranges.

Does MistralAI-Index obey robots.txt?

Token documented by Mistral. Mistral lists MistralAI-Index among the robots.txt tags it uses for site owners. Its page states no crawl-delay or other detail.

How do I block MistralAI-Index?

Add a group to the robots.txt at the root of your domain: User-agent: MistralAI-Index followed by Disallow: /. A group that names the bot overrides a general User-agent: * group. Mistral AI documents nothing about robots.txt for this agent, so we cannot promise it is honored.

Will blocking MistralAI-Index hurt my Google rankings or AI visibility?

It can. This bot builds the index an AI assistant searches when it answers, so blocking it can keep you out of that assistant's answers. Your pages can drop out of Mistral search, the index Vibe uses to answer questions. Training is governed by a separate tag, MistralAI-Training.

Other AI search crawlers

All AI Search Crawlers · Bot directory · Which bots to allow or block · robots.txt generator · See a page as a bot