What is MistralAI-User ?
MistralAI-User is a user-agent string observed when users interact with Mistral AI’s services that incorporate live or contextual web access. This identifier is not tied to a crawler but to real-time HTTP requests triggered during LLM usage. As of today, no official documentation describes it publicly, but network administrators have reported its presence in server logs during API-driven content fetching or prompt-time lookups.
Who is operating MistralAI-User ?
The user-agent is associated with Mistral, a French AI company focused on open-weight large language models and infrastructure. Mistral has not published a public bot policy or endpoint documentation for this agent, but the presence of this identifier suggests the company is experimenting with or deploying retrieval-augmented generation systems.
Why you should be interested in MistralAI-User ?
This agent could be hitting your site when a user query involves fetching live information. Even if traffic is low, the impact on content reuse and visibility in AI responses is non-negligible. Because the agent is linked to inference-time resolution, it may bypass traditional crawlers and access sensitive or proprietary content without indexing it, but still reusing it.
How to block MistralAI-User ?
1. User-Agent Filtering:
Block “MistralAI-User” at the server level (Apache/Nginx).
2. robots.txt not applicable:
This user-agent behaves like a browser session, not a bot—it does not respect robots.txt.
3. Watch for usage patterns:
Log inspection and rate-limiting may be necessary to identify peaks or automated retrieval behaviors.
About the bot
Owner: Mistral
Owner URL: mistral.ai
Bot URL: mistral.ai
Bot User Agent: MistralAI-User
Respects robots.txt: No
