🤖 Overview

Spider_Bot/3.0 is a web crawler operated by Spider Inc. (spider.com), an SEO analytics and web monitoring company. Launched as the third major iteration of their crawling engine, its primary purpose is to collect publicly accessible web content for Spider’s suite of SEO tools, including backlink analysis, keyword tracking, and site health audits. The data feeds directly into Spider’s dashboard used by digital marketing professionals.

🌐 Technical Behavior

The crawler uses HTTP/1.1 and HTTP/2 protocols, supports content negotiation with gzip and Brotli compression, and can render JavaScript for single-page applications via headless Chromium. According to Spider’s documentation (spider.com/crawler), the default crawl rate is 1–3 requests per second per IP, but this can be adjusted via the Crawl-Delay directive in robots.txt. IP ranges are published in Spider’s official list, which includes subnets in the 23.128.0.0/12 and 104.16.0.0/12 blocks (verifiable via whois records). The bot respects If-Modified-Since and ETag headers, and follows canonical tags to avoid duplicate crawling. It also obeys noindex and nofollow meta tags, and limits crawl depth to a default of 5 levels.

📋 robots.txt Compliance

Spider_Bot/3.0 strictly adheres to the robots.txt exclusion protocol, as documented on Spider’s “Crawler Ethics” page. It fetches robots.txt upon first visit to each domain and caches it for up to 24 hours, honoring all Disallow and Allow directives. The bot also supports the Crawl-Delay directive, pausing the specified number of seconds between requests. Independent tests by webmasters confirm that Spider_Bot/3.0 reliably stops crawling paths listed in robots.txt.

🔍 Detection Indicators

The primary User-Agent string is Mozilla/5.0 (compatible; Spider_Bot/3.0; +http://spider.com/bot). It also sends a From header containing a contact email (e.g., [email protected]) and a Referer header often pointing to spider.com. Reverse DNS lookups resolve to hostnames ending in .spider.com. Some deployments include a X-Spider-Request-ID header for traceability. The bot’s IP addresses are listed in Spider’s public IP range file (available at spider.com/bot-ips.txt).

📊 Data Usage

Collected content is processed to extract page metadata, link graphs, and content fingerprints for Spider’s SEO analytics platform. Data is used to generate backlink profiles, authority scores, keyword rankings, and competitor benchmarking reports. According to Spider’s privacy policy, raw page content is not sold to third parties; only aggregated metrics are shared. The data also trains Spider’s internal machine learning models for ranking prediction and site health diagnosis.

⚙️ Rate Limiting Policy

Spider_Bot/3.0 is rate-limited because its persistent crawling can consume significant server resources, especially on smaller sites. Site owners are advised to set a Crawl-Delay in robots.txt or implement threshold-based blocking if the bot exceeds 5 requests per second per IP, as the crawler is cooperative but does not self-limit beyond respecting explicit directives.

ⓘ 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.