What is MistralAI-Index?
MistralAI-Index is Mistral AI's search crawler. Search crawlers build the index a search or answer product draws on.
| Operator | Mistral AI |
|---|---|
| Purpose (operator wording) | search index |
| robots.txt token | MistralAI-Index |
| User agent string | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-Index/1.0; +https://docs.mistral.ai/robots) |
| Respects robots.txt | Not stated |
| IP ranges | https://mistral.ai/mistralai-index-ips.json |
| Last verified |
What else should I know about MistralAI-Index?
What is the MistralAI-Index user agent string?
This is the user agent string Mistral AI documents for MistralAI-Index, as of October 29, 2026. Version numbers and details can change, so match on the token in robots.txt, not on the whole string.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-Index/1.0; +https://docs.mistral.ai/robots)How do I block MistralAI-Index in robots.txt?
Add this group to the robots.txt file at the root of your site. It asks MistralAI-Index to stay out of every page.
User-agent: MistralAI-Index
Disallow: /To allow it explicitly, for example while a broader rule blocks other bots:
User-agent: MistralAI-Index
Allow: /How do I opt out of Mistral AI training but stay in its search?
Each Mistral AI user agent has its own token, so you can set them one by one. This file blocks MistralAI-Training and allows MistralAI-User, MistralAI-Index. Every line comes from the rows in this dataset. Whether allowing a bot keeps you in a product is Mistral AI's call, so check each crawler's page.
User-agent: MistralAI-Training
Disallow: /
User-agent: MistralAI-User
Allow: /
User-agent: MistralAI-Index
Allow: /Does blocking MistralAI-Index affect AI answers?
Mistral: indexes content for Mistral search, which helps answer user questions in Vibe. Explicit effect of blocking: not stated.
Each other Mistral AI user agent has its own robots.txt token, so a rule for MistralAI-Index does not cover them. See the related crawlers below.
Does MistralAI-Index follow robots.txt?
Not stated. Mistral doc names MistralAI-Index as a robots.txt user agent for indexing; explicit compliance sentence not captured.
Robots.txt is a request, not a lock (RFC 9309).
What IP addresses does MistralAI-Index use?
Mistral AI publishes a list at https://mistral.ai/mistralai-index-ips.json. We did not download or parse it. A request that claims to be MistralAI-Index but comes from outside that list is not MistralAI-Index.
Which other Mistral AI crawlers are there?
What should I read next?
Next: give AI tools something to quote
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