MistralAI-User

Q: What is MistralAI-User?

MistralAI-User is Mistral AI's user-initiated fetcher — it fetches a page live because a human asked the assistant about it right now. Most vendors state this tier ignores robots.txt, reasoning that a human requested the specific page.

Q: What is MistralAI-User's user-agent string?

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

Mistral AI · User-initiated fetcher · Updated 2026-07-19

MistralAI-User is Mistral AI’s user-initiated fetcher — it fetches a page live because a human asked the assistant about it right now. Most vendors state this tier ignores robots.txt, reasoning that a human requested the specific page.

User-agent string

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

Source: vendor-documented at docs.mistral.ai/robots.

Does MistralAI-User respect robots.txt?

Mistral documents robots.txt as the control for MistralAI-User even though fetches are user-triggered — with Claude-User, one of only two documented exceptions in this tier. Mistral also states it is “not used for crawling the web in any automatic fashion, nor to crawl content for generative AI training.”

Allow or block MistralAI-User

# Allow (recommended if you want MistralAI-User traffic)
User-agent: MistralAI-User
Allow: /

# Block
User-agent: MistralAI-User
Disallow: /

Verifying it’s really MistralAI-User

Mistral publishes IP ranges at mistral.ai/mistralai-user-ips.json. User-agent strings can be spoofed by anyone — identity claims are only trustworthy when the source IP matches the operator’s published ranges.

Fetch the published ranges and check a suspect IP against them:

curl -s https://mistral.ai/mistralai-user-ips.json

What site owners should know

Fires when a user of Mistral’s assistant asks about your site; answers link the source. Its sibling MistralAI-Index builds Mistral’s search index (IP ranges at mistral.ai/mistralai-index-ips.json) with its own robots token.

Scan your site to see how your robots.txt, content negotiation, and discovery files treat AI agents — including whether you’re blocking agents you meant to allow. Background: the robots.txt guide, how AI agents browse, and agent readiness.

All AI agent user-agents

ClaudeBot · Claude-User · Claude-SearchBot · GPTBot · OAI-SearchBot · ChatGPT-User · PerplexityBot · Perplexity-User · Google-Extended · Google-Agent · Google-CloudVertexBot · Meta-ExternalAgent · Meta-ExternalFetcher · MistralAI-User · Applebot · Applebot-Extended · Amazonbot · bingbot · DuckAssistBot · CCBot · Bytespider