What is Perplexity-User?
Direct Answer: Perplexity-User is a user-initiated fetcher that visits web pages in real time when a Perplexity user asks a question that requires reading a specific page to produce an accurate answer.
Perplexity-User supports user actions inside the Perplexity product: when a person asks Perplexity a question, this fetcher may visit a page to gather context needed to produce the answer. Because each request is triggered by an individual human query, Perplexity documents that Perplexity-User generally ignores robots.txt rules — the same behavior model applied to other user-fetch agents such as ChatGPT-User. It identifies itself with the token 'Perplexity-User', and Perplexity publishes its IP ranges as a JSON file so origin servers can verify traffic that claims to come from it.
User-Agent Identification
The following user-agent strings identify Perplexity-User in your live traffic data:
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user)
robots.txt Rules for Perplexity-User
Respects robots.txt: No
Use the following robots.txt rules to control Perplexity-User access:
# Block Perplexity-User
User-agent: Perplexity-User
Disallow: /
# Allow Perplexity-User
User-agent: Perplexity-User
Allow: /Robots.txt has limited effect on user-initiated bots
Perplexity-User is triggered by user actions within Perplexity AI's products. While Perplexity AI states it respects robots.txt, the bot operates differently from autonomous crawlers — it fetches specific URLs on demand rather than systematically spidering your site. Server-log monitoring is the only reliable way to verify what actually happens.
Need continuous verification across 500+ bots? Can AI See It automates this.
Crawl Behavior
Request Pattern:Not documented
Official Documentation Quotes
"Perplexity-User supports user actions within Perplexity. When users ask Perplexity a question, it might visit a web page to help provide an accurate answer."
"Because a user requested the fetch, this fetcher generally ignores robots.txt rules."
Why track Perplexity-User traffic?
Measure what Perplexity AI gives back. Perplexity-User fetches your pages for AI-assisted answers — but do users actually click through to your site? Track referral visits from Perplexity AI's AI assistant relative to how many pages it fetches.
Track real-time content usage by AI assistants. Perplexity-User fetches your pages when a user explicitly asks Perplexity AI's AI assistant to look something up. Each request represents a real user seeking your content through an AI intermediary.
Attribute AI-driven sessions. When someone clicks a link provided by Perplexity AI's assistant, that visit can be tracked in your analytics. Connect Perplexity-User crawls to referral sessions to measure the full path: AI fetch → user click → conversion.
Understand content authority signals. The pages Perplexity-User fetches most often reveal what Perplexity AI's AI considers authoritative on your site.
Detect 4XX and 5XX errors before users do. When Perplexity-User hits a broken or unavailable page, it can't serve your content to users asking about it. Catching these errors early in your logs prevents lost visibility in AI-assisted answers.
Every Perplexity-User request = a real person looking for your content
Unlike autonomous crawlers, Perplexity-User only fetches your page when a real user asks for it. Every request in your logs represents someone who specifically wanted information from your site through Perplexity AI's AI assistant.
"Find me information from [your domain]"
Logged in your server access logs with timestamp and URL
User sees your information with a citation link
Trackable as a referral session in your analytics
This makes Perplexity-User the most directly measurable AI traffic source. Can AI See It connects these dots with the Crawl-to-Referral Ratio (CRR) — showing what percentage of AI-fetched requests translate into actual site visits and conversions.
What Can AI See It measures for Perplexity-User
How many real users asked AI to fetch your content
What % of AI-fetched visitors actually land on your site
Which content AI users ask about most
Conversions from AI assistant referrals
Blocking Perplexity-User means cutting off a channel where real users are actively seeking your content. Before deciding, measure how many of these requests convert.
How is this different from prompt testing tools? Prompt testing checks if AI mentions your brand in simulated queries. Can AI See It measures what actually happens: real crawls, real referrals, real conversions — from your live traffic data.
Read: Why live traffic monitoring beats prompt testing →Log Verification
To verify Perplexity-User traffic in your live traffic data:
- Search access logs for the user-agent strings listed above
- Check if the IP addresses match documented ranges (if provided by Perplexity AI)
- Verify the crawl pattern matches documented behavior
- Use reverse DNS lookup for additional verification if available
IP Verification: Perplexity AI provides official IP verification via Published IP list. View verification instructions →
Perplexity publishes the Perplexity-User IP ranges as a JSON file.
Note: Observed behavior in production environments may differ from official documentation. Live traffic monitoring provides the only reliable verification of actual bot behavior.
Undocumented Information
The following information is not officially documented for Perplexity-User:
- crawl frequency
- request pattern
- JavaScript rendering
Live traffic monitoring vs prompt testing
| Prompt testing tools | Can AI See It | |
|---|---|---|
| What it measures | Does AI mention your brand in test prompts? | Does AI bot activity lead to real visits and conversions? |
| Data source | Simulated AI queries | Your live traffic data + analytics |
| Covers which bots | ChatGPT, Perplexity, Gemini (chat interfaces only) | 500+ bots including crawlers, assistants, and training bots |
| Business metric | Brand mention frequency | Crawl-to-Referral Ratio, revenue attribution |
| Tells you | "AI mentions you 34% of the time for keyword X" | "Perplexity-User crawled 8,200 pages and Perplexity AI sent 290 visitors who generated $4,100 in revenue" |
Measure your Crawl-to-Referral Ratio for Perplexity-User
See how much traffic Perplexity AI actually sends back to your site relative to how much content Perplexity-User takes.
- Connect Perplexity-User crawls in your logs with referral sessions in analytics
- Calculate your CRR — the metric prompt testing tools can't provide
- Make data-driven block/allow decisions for every AI bot
Measure business impact from Perplexity-User
The real question is: does Perplexity-User activity translate into referrals, sessions, and conversions on your site?
- Crawls: pages fetched by Perplexity-User
- Referral tracking: Perplexity-User takes — measure what Perplexity AI gives back. Track actual visits arriving from Perplexity AI's products to your site.
- CRR: your Crawl-to-Referral Ratio — referrals per 1,000 crawls
Based on your live traffic data and analytics — not synthetic prompt tests.
Official Documentation
View Official Perplexity-User Documentation →
Information sourced from official documentation.