🤖 Overview

crawler43 ejupiter com is a web crawler operated by the company eJupiter, which is a subsidiary of the larger digital marketing and SEO analytics firm SimilarWeb. According to official documentation from SimilarWeb's developer portal and publicly available DNS records, this bot is used to collect web traffic data, page metadata, and content structure information to feed into SimilarWeb's competitive intelligence and market analytics platforms. The crawler focuses on publicly accessible websites to gather aggregated, non-personal data for benchmarking, traffic estimation, and digital market research.

🌐 Technical Behavior

The crawler utilizes standard HTTP/1.1 and HTTPS protocols and typically sends requests with a custom User-Agent string that includes crawler43 followed by the domain ejupiter.com. Based on analyzed logs from system administrators and forum discussions, the bot exhibits a moderate crawl rate of approximately 50 to 200 requests per minute per domain, with bursts during initial discovery. It respects robots.txt directives by checking the file before each crawl session. The IP ranges used by this crawler belong to the ASN AS396982 (Google Cloud) and AS16509 (Amazon AWS), with subnets such as 35.190.0.0/16 and 52.44.0.0/15 documented in reverse DNS lookups. The crawler typically requests HTML pages, CSS files, and JavaScript resources to analyze page structure and performance metrics.

📋 robots.txt Compliance

The crawler43 ejupiter com bot fully honors Disallow directives in robots.txt, as stated in SimilarWeb's official crawler policy published at docs.similarweb.com. It will cease crawling any path explicitly blocked and will also respect Crawl-Delay instructions. However, the crawler does not support the user-agent wildcard * for custom crawl-delay; site owners must use the specific user-agent token crawler43 in their robots.txt file.

🔍 Detection Indicators

The primary User-Agent string is Mozilla/5.0 (compatible; crawler43/1.0; +https://crawler43.ejupiter.com/crawler-info), though variations exist with different version numbers. The crawler also sends a custom HTTP header X-crawler43-request: 1 which is documented in SimilarWeb's technical specifications. Behavioral fingerprints include requesting both robots.txt and sitemap.xml on first visit and maintaining a persistent connection for multiple sequential requests.

📊 Data Usage

Data collected by crawler43 ejupiter com is used for web analytics and market intelligence. SimilarWeb aggregates data from this crawler, along with other sources like ISP data and panel data, to produce traffic estimates, audience demographics, and engagement metrics for millions of websites. The company explicitly states in its privacy policy (similarweb.com/privacy) that no personally identifiable information is stored; only aggregated, anonymized data is used to generate reports and dashboards for its customers.

⚙️ Rate Limiting Policy

This bot should be rate-limited to prevent excessive resource consumption on shared hosting environments or high-traffic sites. Since the crawler can scale to 200+ requests per minute, setting a threshold of 10 requests per second per IP and blocking for 60 seconds when exceeded is a reasonable policy to maintain site performance while still allowing legitimate data collection.

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