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AI agent
Perplexity-User
PerplexityIgnores robots.txt
Fetches a specific page because a user's query required it. Perplexity states this agent is user-initiated and therefore not governed by robots.txt. Block at the edge if you need it stopped.
User-agent string
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user
How to verify it
Perplexity's published user-agent IP list.
What blocking costs
Perplexity states this agent is user-initiated and therefore not governed by robots.txt. Block at the edge if you need it stopped.
robots.txt rule
# Block Perplexity-User
User-agent: Perplexity-User
Disallow: /
# Allow everything else
User-agent: *
Allow: /Robots.txt is not enough
Perplexity-User is documented as not governed by robots.txt. Enforce at the CDN or web server, and verify the request genuinely originates from Perplexity before blocking by string alone.
Generate a full robots.txt
Pick which AI crawlers to allow or block across all 42 agents and copy the file out.
Open the generator →Other Perplexity agents