🤖 Overview

Bullseye is a legitimate web crawler operated by Bullseye Intelligence, a US-based data analytics company specializing in e-commerce competitive intelligence. Its primary purpose is to systematically collect product listings, pricing data, and inventory information from publicly accessible retail websites to feed into the Bullseye Market Insights platform. The platform aggregates this data to provide retailers and manufacturers with real-time market trends, price benchmarking, and stock-level analysis. Bullseye publicly identifies itself via its official documentation at https://www.bullseye.com/bot and has been operating since at least 2017, with regular updates to its crawling algorithms.

🌐 Technical Behavior

Bullseye crawls using a distributed cluster of IP addresses assigned from the 104.16.0.0/12 and 162.159.0.0/16 ranges, which are registered under the same ASN as Cloudflare’s infrastructure, though Bullseye maintains its own proxy networks. The bot sends HTTP GET requests with standard headers and a default Crawl-Delay of 10 seconds as specified in its official robots.txt directives. It respects HTTP ETag and Last-Modified headers to avoid re-downloading unchanged content, and it supports gzip compression. Bullseye typically visits each page once every 24–48 hours, but during peak data refreshes it may increase frequency to once every 6 hours for high-value product pages. The crawler follows rel="nofollow" meta tags and canonical URLs to avoid duplicate content, and it terminates connections after 30 seconds of inactivity.

📋 robots.txt Compliance

Bullseye fully obeys the robots.txt protocol, including Disallow directives at both the directory and file level, and respects Allow overrides. Its official documentation states that the bot reads robots.txt at the start of every crawl session and caches the rules for up to one hour. If a site explicitly blocks Bullseye via User-Agent rule, the bot will not revisit that site for at least 72 hours.

🔍 Detection Indicators

The primary User-Agent string is Bullseye/1.0 (compatible; +https://www.bullseye.com/bot). Alternate strings may appear as BullseyeBot/2.0 or Bullseye-Enterprise for premium customers. Behavioral fingerprints include a consistent request interval of 10 seconds, a unique X-Bullseye-ID header containing a 64-character hex token, and a pattern of requesting /robots.txt before any site-specific crawl. Logs also reveal a high rate of GET /favicon.ico requests immediately after the first page is visited.

📊 Data Usage

Collected data is used exclusively for competitive market analytics, including price comparison charts, stock-out alerts, and category trend reports delivered to subscribing clients through the Bullseye dashboard and API. The platform does not resell raw data to third parties and anonymizes store-level information before generating aggregated insights. Bullseye states that it does not extract personal identifiable information (PII) and explicitly ignores login pages and checkout flows.

⚙️ Rate Limiting Policy

Bullseye is rate-limited because its distributed architecture can generate hundreds of requests per minute from multiple IPs, which may degrade server performance for smaller sites. The recommended policy is to implement threshold-based blocking that triggers a 429 Too Many Requests response after 50 requests within a 60-second window, while still honoring the Crawl-Delay directive to maintain good crawl citizenship.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.