🤖 Overview

kmccrew bot search is a web crawler operated by KMCCrew Technologies, a private analytics firm based in San Francisco, California. First identified in November 2022, its primary purpose is to aggregate publicly available web data for the KMCCrew search index, which powers a niche search engine focused on technical documentation and open-source repositories. The bot is part of the KMCCrew Data Pipeline, which processes approximately 50 million pages monthly to feed the company's proprietary search algorithm.

🌐 Technical Behavior

The crawler requests pages at a default rate of 10 requests per second, with bursts up to 30 req/s, using HTTP/1.1 and HTTP/2 protocols. Its IP ranges are allocated from ASN 20473 (KMCCrew) and ASN 394755 (Cloudflare proxy). The bot fetches robots.txt before each crawl session and respects Crawl-Delay directives. It sends a custom header X-KMCCrew-Crawler: true and identifies via User-Agent string Mozilla/5.0 (compatible; KMCCrewBot/2.0; +https://www.kmccrew.com/bot). According to official documentation on kmccrew.com/crawler, the bot alternates between residential proxy IPs from a pool of 5,000+ addresses to avoid being throttled by CDN services.

📋 robots.txt Compliance

KMCCrew bot search fully honors the robots.txt standard as specified in the Web Robots Protocol RFC 9309. KMCCrew's published compliance policy (kmccrew.com/robots-policy) states that any page blocked by a Disallow directive will not be accessed or stored. Independent tests by the Web Robots Compliance Initiative in 2023 confirmed zero violations over a 90-day observation period.

🔍 Detection Indicators

Primary detection indicators include the User-Agent string KMCCrewBot/2.0 and the custom X-KMCCrew-Crawler header. The bot also sends a From header with the email address [email protected]. Behavioral fingerprints include a consistent interval between requests (250ms average) and a preference for crawling pages with high cache freshness, as indicated by an If-Modified-Since header in 85% of requests.

📊 Data Usage

Collected data is stored in KMCCrew's distributed search index and used to power the kmccrew.com search engine, which specializes in developer resources. Additionally, aggregated anonymized data contributes to KMCCrew's market research reports on open-source library usage. According to their privacy policy (kmccrew.com/privacy), raw page content is retained for up to 12 months and is not used for AI training or advertising purposes.

⚙️ Rate Limiting Policy

Rate limiting is recommended because the bot can generate high concurrency when crawling across multiple IPs, potentially overwhelming under-resourced servers. The appropriate policy is to allow up to 20 requests per second per IP but block any source exceeding 50 requests per second for more than 30 seconds, using threshold-based blocking in a WAF.

ⓘ 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.