# MistralAI-Index

> Indexes web content for Mistral search, which helps answer questions in its Vibe assistant. Mistral says the content is not used for generative AI training of any kind.

Canonical page: https://getrankroot.com/ai-bots/mistralai-index · Facts checked against Mistral AI docs on 2026-10-20

| Operator | Used for | Type | Obeys robots.txt |
| --- | --- | --- | --- |
| Mistral AI | Mistral search | AI search index | Yes |

## Should you allow it?

Allow it.

**If you block it:** Your content is not indexed for Mistral search.

## robots.txt rules

Allow MistralAI-Index:

```
User-agent: MistralAI-Index
Allow: /
```

Block MistralAI-Index:

```
User-agent: MistralAI-Index
Disallow: /
```

Disallow MistralAI-Index from one folder only:

```
User-agent: MistralAI-Index
Disallow: /private/
Allow: /
```

A bot follows the most specific User-agent group that names it and ignores the generic `User-agent: *` group, so repeat any shared Disallow lines inside it.

## Same company, different bots: Mistral AI

| Bot | Type | Purpose | Obeys robots.txt | If you block it |
| --- | --- | --- | --- | --- |
| [MistralAI-User](https://getrankroot.com/ai-bots/mistralai-user.md) | User-triggered fetcher | Mistral Vibe (user requests) | Yes | Mistral's assistant cannot visit your pages to answer users' questions. |
| [MistralAI-Index](https://getrankroot.com/ai-bots/mistralai-index.md) | AI search index | Mistral search | Yes | Your content is not indexed for Mistral search. |
| [MistralAI-Training](https://getrankroot.com/ai-bots/mistralai-training.md) | AI training crawler | Mistral model training | Yes | Your content is not collected for Mistral's training datasets. |

## User agent string

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

## How to verify it's really MistralAI-Index

Find its requests in your server logs:

```
grep -i "MistralAI-Index" access.log
```

Mistral publishes IP lists for MistralAI-User and MistralAI-Index.

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

## Common mistakes

- Writing a User-agent: MistralAI-Index group and expecting your User-agent: * rules to still apply. A crawler follows only the most specific group that matches it and ignores the others, so repeat any shared Disallow lines inside the MistralAI-Index group.
- Leaving a CDN or host "block AI bots" setting on and only checking robots.txt. Those settings block requests at the network edge. Cloudflare, for example, changed its defaults on September 15, 2026 for customers who did not opt out: bots it classifies as Training or Agent are blocked on pages that display ads, and multi-purpose crawlers that combine Search and Training are affected by the Training block.
- Trusting the user agent header alone. Anyone can send "MistralAI-Index" in a request; verify the source IP as shown above before allowlisting or blocking.

## FAQ

### What is MistralAI-Index?

Indexes web content for Mistral search, which helps answer questions in its Vibe assistant. Mistral says the content is not used for generative AI training of any kind.

### Does MistralAI-Index respect robots.txt?

Yes, according to Mistral AI.

### What happens if I block MistralAI-Index?

Your content is not indexed for Mistral search.

### Should I block MistralAI-Index?

Allow it.

## Sources

- [Official documentation from Mistral AI](https://docs.mistral.ai/robots)
- [Published IP addresses for MistralAI-Index](https://mistral.ai/mistralai-index-ips.json)

Check whether MistralAI-Index can reach a site: https://getrankroot.com/tools/ai-crawler-checker or `GET https://getrankroot.com/api/bots?url=example.com`. Full list: https://getrankroot.com/ai-bots.md