Bot signals — AI crawler & agent

MistralAI-User IP addresses

Mistral user-triggered retrieval egress.

risk.is_airisk.is_crawler Ranges Reviewed

Check an IP

Is this IP really MistralAI-User?

Checks the address against what MistralAI-User publishes, the same evidence behind risk.is_ai.

01 — Verification

How IPAPI.GR verifies MistralAI-User.

Only from what MistralAI-User publishes about itself. No third-party blocklists, no behavioural guesses. Live address counts change with every publication, so check the official file for the current list.

02 — In the response

What a match looks like.

A lookup of a MistralAI-User address sets risk.is_ai and risk.is_crawler. The flags come with geolocation and network data in the same response, for Pro API keys.

This publication is AI crawling or retrieval traffic, so it counts as both an AI source and a crawler.

The response says which kind of bot an address belongs to, not which operator. Pair it with the user agent: a request that claims to be MistralAI-User but doesn't match is unverified.

GET /api/lookup/{ip}?key=PRO_KEY
{
  // … location and network fields …
  "risk": {
    "is_ai": true,
    "is_crawler": true,
    "is_scanner": false
  }
}

03 — Configuration

Allow, block or verify it yourself.

nginx + jq
# 1. Build a geo include from the official file (cron, e.g. hourly).
#    Keep the old file if the download fails or comes back empty.
curl -fsS https://mistral.ai/mistralai-user-ips.json \
  | jq -r '.prefixes[] | (.ipv4Prefix // .ipv6Prefix // empty) | "\(.) 1;"' \
  > /etc/nginx/mistralai-user-ranges.conf.new && [ -s /etc/nginx/mistralai-user-ranges.conf.new ] && mv /etc/nginx/mistralai-user-ranges.conf.new /etc/nginx/mistralai-user-ranges.conf \
  && nginx -t -q && nginx -s reload

# 2. In the http block: 1 when the client IP is in the published ranges.
geo $mistralai_user_ip {
    default 0;
    include /etc/nginx/mistralai-user-ranges.conf;
}
Built from mistral.ai/mistralai-user-ips.json, a JSON file with a prefixes array.

04 — Questions

About MistralAI-User.

Where does MistralAI-User publish its IP addresses?

MistralAI-User publishes its addresses at https://mistral.ai/mistralai-user-ips.json. IPAPI.GR reads that publication directly, not a third-party copy.

How often is the MistralAI-User list refreshed?

IPAPI.GR re-fetches it every hour. If a refresh fails, the previous entries expire after at most 24 hours instead of being trusted forever.

Which risk flag does MistralAI-User set?

A matching address sets risk.is_ai and risk.is_crawler in the lookup response. The risk flags are returned for Pro API keys.

Verify MistralAI-User on every request.

Pro: 40,000,000 requests a day with is_ai, is_crawler and is_scanner in every lookup.