AI crawlers · Search indexes

`MistralAI-Index`

MistralAI-Index is the search index crawler run by Mistral: Mistral search index for Vibe. Its operator publishes the IP ranges it crawls from (https://mistral.ai/mistralai-index-ips.json), so a request carrying the name can be checked against that list.

User-agent token	`MistralAI-Index`
Operator	Mistral
What it does	Mistral search index for Vibe
Kind	search index crawler
Can a request be verified?	Yes — published ip feed
Verification source	https://mistral.ai/mistralai-index-ips.json
In a CrawlCheck scan	Read from robots.txt; a refusal is scored

Allow or block it in robots.txt

User-agent: MistralAI-Index
Disallow: /

User-agent: MistralAI-Index
Allow: /

Add a group that names it: "User-agent: MistralAI-Index" followed by "Disallow: /". A crawler follows only the most specific group that names it, so once a group names MistralAI-Index, rules under "User-agent: *" no longer apply to it; repeat in that group any Disallow lines you still want.

What blocking it changes

Indirectly. It feeds Mistral search index for Vibe. A refusal removes pages from that index, and most AI answer surfaces still draw on search indexes.

Other agents from Mistral

MistralAI-User — Le Chat live fetch
MistralAI-Training — Mistral training crawl

See what MistralAI-Index and every other named agent receive from your own site: run a free scan. The full catalogue is on AI crawlers and as JSON at /ai-crawlers.json.

Questions about MistralAI-Index

QHow do I block MistralAI-Index in robots.txt?

QHow can I tell if a request from MistralAI-Index is real?

Its operator publishes the IP ranges it crawls from (https://mistral.ai/mistralai-index-ips.json), so a request carrying the name can be checked against that list.

QDoes blocking MistralAI-Index affect whether my site appears in AI answers?

Indirectly. It feeds Mistral search index for Vibe. A refusal removes pages from that index, and most AI answer surfaces still draw on search indexes.

QDoes CrawlCheck test my site as MistralAI-Index?

Not as a request. CrawlCheck reads the rules your robots.txt sets for MistralAI-Index and reports them. A refusal of it counts toward the grade, because it costs the site visibility.