PerplexityBot
Allow this token if you want pages eligible to surface and receive links in Perplexity search results.
Perplexity crawler controls
PerplexityBot indexes search. Perplexity-User fetches on demand.
Perplexity documents PerplexityBot as its search crawler and says it is not used for foundation-model training. Perplexity-User supports user actions and generally ignores robots.txt because the fetch is user initiated.
Perplexity-User
A user-request fetcher, not an automatic indexing crawler. A robots.txt result for this agent is advisory.
Request verification
Perplexity publishes separate current IP-range JSON endpoints for both agents and recommends checking the user agent and IP together.
Search example
Source: Perplexity crawler documentation.