MistralAI-User
Mistral AI •
Since 2024
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What is MistralAI-User?
MistralAI-User is the user agent used when Mistral AI's Le Chat assistant accesses the web on behalf of users during conversations. Unlike training crawlers, this bot only fetches pages in real-time when a user explicitly requests web information. It respects robots.txt directives and identifies itself clearly, allowing website owners to control access. The bot is designed for real-time content retrieval rather than bulk crawling or data collection for model training.
User Agent String
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MistralAI-User/1.0; +https://docs.mistral.ai/robots)
How to Control MistralAI-User
Block Completely
To prevent MistralAI-User from accessing your entire website, add this to your robots.txt file:
# Block MistralAI-User
User-agent: MistralAI-User
Disallow: /
Block Specific Directories
To restrict access to certain parts of your site while allowing others:
User-agent: MistralAI-User
Disallow: /admin/
Disallow: /private/
Disallow: /wp-admin/
Allow: /public/
Set Crawl Delay
To slow down the crawl rate (note: not all bots respect this directive):
User-agent: MistralAI-User
Crawl-delay: 10
How to Verify MistralAI-User
Verification Method:
Verify requests originate from Mistral AI IP ranges
Verify requests originate from Mistral AI IP ranges
Learn more in the official documentation.
⚠️ AI Training Notice
This bot may collect and use your website content for AI model training. Consider whether you want your content used for this purpose before allowing access.
This bot may collect and use your website content for AI model training. Consider whether you want your content used for this purpose before allowing access.
Detection Patterns
Multiple ways to detect MistralAI-User in your application:
Basic Pattern
/MistralAI\-User/iStrict Pattern
/^Mozilla/5\.0 AppleWebKit/537\.36 \(KHTML, like Gecko; compatible; MistralAI\-User/1\.0; \+https\://docs\.mistral\.ai/robots\)$/Flexible Pattern
/MistralAI\-User[\s\/]?[\d\.]*?/iVendor Match
/.*Mistral AI.*MistralAI\-User/iImplementation Examples
// PHP Detection for MistralAI-User
function detect_mistralai_user() {
$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';
$pattern = '/MistralAI\\-User/i';
if (preg_match($pattern, $user_agent)) {
// Log the detection
error_log('MistralAI-User detected from IP: ' . $_SERVER['REMOTE_ADDR']);
// Set cache headers
header('Cache-Control: public, max-age=3600');
header('X-Robots-Tag: noarchive');
// Optional: Serve cached version
if (file_exists('cache/' . md5($_SERVER['REQUEST_URI']) . '.html')) {
readfile('cache/' . md5($_SERVER['REQUEST_URI']) . '.html');
exit;
}
return true;
}
return false;
}
# Python/Flask Detection for MistralAI-User
import re
from flask import request, make_responsedef detect_mistralai_user():
user_agent = request.headers.get('User-Agent', '')
pattern = r'MistralAI-User'
if re.search(pattern, user_agent, re.IGNORECASE):
# Create response with caching
response = make_response()
response.headers['Cache-Control'] = 'public, max-age=3600'
response.headers['X-Robots-Tag'] = 'noarchive'
return True
return False# Django Middleware
class MistralAIUserMiddleware:
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
if self.detect_bot(request):
# Handle bot traffic
pass
return self.get_response(request)
// JavaScript/Node.js Detection for MistralAI-User
const express = require('express');
const app = express();// Middleware to detect MistralAI-User
function detectMistralAIUser(req, res, next) {
const userAgent = req.headers['user-agent'] || '';
const pattern = /MistralAI-User/i;
if (pattern.test(userAgent)) {
// Log bot detection
console.log('MistralAI-User detected from IP:', req.ip);
// Set cache headers
res.set({
'Cache-Control': 'public, max-age=3600',
'X-Robots-Tag': 'noarchive'
});
// Mark request as bot
req.isBot = true;
req.botName = 'MistralAI-User';
}
next();
}app.use(detectMistralAIUser);
# Apache .htaccess rules for MistralAI-User# Block completely
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} MistralAI\-User [NC]
RewriteRule .* - [F,L]# Or redirect to a static version
RewriteCond %{HTTP_USER_AGENT} MistralAI\-User [NC]
RewriteCond %{REQUEST_URI} !^/static/
RewriteRule ^(.*)$ /static/$1 [L]# Or set environment variable for PHP
SetEnvIfNoCase User-Agent "MistralAI\-User" is_bot=1# Add cache headers for this bot
<If "%{HTTP_USER_AGENT} =~ /MistralAI\-User/i">
Header set Cache-Control "public, max-age=3600"
Header set X-Robots-Tag "noarchive"
</If>
# Nginx configuration for MistralAI-User# Map user agent to variable
map $http_user_agent $is_mistralai_user {
default 0;
~*MistralAI\-User 1;
}server {
# Block the bot completely
if ($is_mistralai_user) {
return 403;
}
# Or serve cached content
location / {
if ($is_mistralai_user) {
root /var/www/cached;
try_files $uri $uri.html $uri/index.html @backend;
}
try_files $uri @backend;
}
# Add headers for bot requests
location @backend {
if ($is_mistralai_user) {
add_header Cache-Control "public, max-age=3600";
add_header X-Robots-Tag "noarchive";
}
proxy_pass http://backend;
}
}
Should You Block This Bot?
Recommendations based on your website type:
| Site Type | Recommendation | Reasoning |
|---|---|---|
| E-commerce | Limit Access | Protect pricing and inventory data from AI training |
| Blog/News | Consider Blocking | Your content may be used for AI training without compensation |
| SaaS Application | Block | No benefit for application interfaces; preserve resources |
| Documentation | Selective | Allow for public docs, block for internal docs |
| Corporate Site | Limit | Allow for public pages, block sensitive areas like intranets |
Advanced robots.txt Configurations
E-commerce Site Configuration
User-agent: MistralAI-User
Crawl-delay: 5
Disallow: /cart/
Disallow: /checkout/
Disallow: /my-account/
Disallow: /api/
Disallow: /*?sort=
Disallow: /*?filter=
Disallow: /*&page=
Allow: /products/
Allow: /categories/
Sitemap: https://example.com/sitemap.xml
Publishing/Blog Configuration
User-agent: MistralAI-User
# Blocking AI training bot
Disallow: /
SaaS/Application Configuration
User-agent: MistralAI-User
Disallow: /app/
Disallow: /api/
Disallow: /dashboard/
Disallow: /settings/
Allow: /
Allow: /pricing/
Allow: /features/
Allow: /docs/
Quick Reference
User Agent Match
MistralAI-UserRobots.txt Name
MistralAI-UserCategory
aiRespects robots.txt
Yes
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