Skip to content

What is MistralAI-Index?

MistralAI-Index is Mistral's crawler for indexing. Mistral says it crawls the web automatically for indexing purposes only, to index content for Mistral search, which helps answer user questions in Vibe. Mistral says the content it crawls is not used for generative AI training of any kind.

Operator
Mistral AI
Purpose
Indexes pages for Mistral search.
robots.txt token
MistralAI-Index
Example user agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-Index/1.0; +https://docs.mistral.ai/robots)
How to verify
Check that the source IP is in the ranges Mistral publishes for MistralAI-Index.
IP ranges
https://mistral.ai/mistralai-index-ips.json
Operator documentation
https://docs.mistral.ai/robots
Last verified

How often is MistralAI-Index impersonated?

We have not measured requests claiming to be MistralAI-Index yet, so we show no share.

This directory measures requests between 3 July 2026 and 28 September 2026. The fake crawler report covers its own, earlier window (late June to 21 September 2026), so its figures differ from the ones here. Read it for the method.

Have a request that claims to be MistralAI-Index? Check its IP address.

Should you block MistralAI-Index?

Allow it if
you want Mistral's search to find your pages when it answers a user's question.
Block it if
you do not want your pages in Mistral's search index.
What blocking changes
Mistral does not state what a block changes. The crawler's stated job is to index content for Mistral search.

To block it, add this group to your robots.txt. Mistral lists MistralAI-Index among the robots.txt tags a site can use to manage how its content interacts with Mistral's AI.

User-agent: MistralAI-Index
Disallow: /

robots.txt only asks. It does nothing against a client that ignores it or only pretends to be MistralAI-Index. Stopping those takes verification at your edge.

Related bots

  • MistralAI-User (Mistral AI): Fetches a page when a Mistral user's action needs it.
  • Claude-SearchBot (Anthropic): Indexes pages to improve Claude's search results.
  • DuckAssistBot (DuckDuckGo): Crawls in real time to support DuckDuckGo's AI-assisted answers.
  • Meta-WebIndexer (Meta): Crawls pages to improve the search results of Meta AI.
  • OAI-SearchBot (OpenAI): Surfaces websites in ChatGPT's search features.
  • PerplexityBot (Perplexity): Surfaces and links websites in Perplexity's search results.

See which bots reach your site, and which of them are who they claim to be.

Request a site audit