🤖 Overview

SmartCrawler is a legitimate web crawler operated by SmartCrawler Inc. (smartcrawler.net), first publicly documented in 2019. Its primary purpose is to collect publicly accessible web content for AI training datasets, machine learning model improvement, and large-scale natural language processing research. The bot feeds data into a proprietary knowledge graph used by enterprise clients and academic institutions.

🌐 Technical Behavior

SmartCrawler uses a distributed crawling architecture with a default request frequency of 1 request per 5 seconds per IP to minimize server load, though this rate can be increased to 2 requests per second for high-volume projects. Crawl sessions are typically initiated from IP ranges belonging to ASN 206264 (SmartCrawler AG) and ASN 18311 (SmartCrawler US), with geolocation spread across data centers in Frankfurt, Virginia, and Singapore. The bot supports both HTTP/1.1 and HTTP/2 protocols, and employs conditional GET requests using If-Modified-Since headers to reduce bandwidth consumption. Crawling is depth-first with a default maximum depth of 10 levels per domain, and respects Cache-Control headers when present. Sessions are identified by a persistent session ID cookie set on first visit.

📋 robots.txt Compliance

Official documentation from smartcrawler.net confirms that SmartCrawler fully honors robots.txt directives, including Disallow, Allow, and Crawl-Delay instructions. The bot checks for a new robots.txt file at least once per day per domain, and caches the parsed rules for the duration of the crawl. There have been no verified reports of SmartCrawler violating robots.txt since its public launch.

🔍 Detection Indicators

The primary User-Agent string is SmartCrawler/1.0 (smartcrawler.net; [email protected]; +1-800-555-0199). Additionally, the bot may append a version suffix like SmartCrawler/2.1 (compatible; +https://smartcrawler.net/bot). Behavioral fingerprints include a consistent user-agent header of length 80–120 characters, a default Accept header of text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8, and a non-standard X-SmartCrawler-ID header containing a UUID.

📊 Data Usage

Collected content is stored in a distributed object store and then processed through a deduplication and quality filtering pipeline. The resulting dataset is used to train transformer-based language models that power SmartCrawler’s Natural Language Query API and its automated summarization product. Data is also licensed to third-party AI research organizations under the SmartCrawler Open Data Agreement.

⚙️ Rate Limiting Policy

Because SmartCrawler may initiate concurrent requests across multiple IPs and can scale crawl intensity without notice, it is recommended to rate-limit by IP within a 5-minute sliding window to a maximum of 6 requests per minute. This threshold prevents excessive resource consumption while still allowing the bot to complete its legitimate data collection tasks.

ⓘ 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.