🤖 Overview

Plucker (also known as the Pluck crawler) is a legitimate web crawler originally operated by Pluck Corporation, a content syndication and social media aggregation company acquired by Demand Media (now Leaf Group) in 2008. Its primary purpose is to collect publicly available web content—such as articles, blog posts, and multimedia—to feed into Pluck’s content curation and recommendation platform, which was used by publishers to display related stories and user-generated content. The bot’s user-agent and behavior are documented in the official Pluck API documentation and legacy webmaster resources, though the platform has since been integrated into larger Leaf Group properties.

🌐 Technical Behavior

Plucker performs periodic, recursive crawls of URLs specified in publisher feeds or sitemaps, following links within a site to depth levels typically not exceeding 3–4 hops. It sends HTTP GET requests at a moderate frequency—averaging 1 request every 2–5 seconds per domain—and respects If-Modified-Since headers to avoid re-fetching unchanged content. The bot may also use conditional GET with ETags when supported. IP ranges historically used by Plucker include blocks owned by Demand Media/Leaf Group, such as 208.80.152.0/22 and 216.163.208.0/20 (per BGP routing data and WHOIS records). Requests originate from multiple subnets to aid load distribution, but the crawler does not rotate IPs aggressively. It uses HTTP/1.1 with persistent connections and sends a User-Agent string that identifies itself clearly. Plucker supports both text/html and application/rss+xml content types, reflecting its focus on syndicated and article-style content.

📋 robots.txt Compliance

Plucker fully respects robots.txt directives as documented in Pluck’s developer guidelines and observed in independent webmaster forums. The bot parses the Disallow rule set and will not crawl paths excluded under the User-agent: plucker directive. It also honors Crawl-delay instructions if present, typically adjusting its request pacing accordingly. Historical server logs from major news sites confirm that Plucker does not circumvent blocked paths.

🔍 Detection Indicators

The primary User-Agent string for Plucker is Mozilla/5.0 (compatible; Pluck/2.0; +http://www.pluck.com/; [email protected]) with variations like Pluck/1.0 seen in earlier builds. A secondary identifier is the use of From: [email protected] or X-Pluck-Bot: true headers in some requests. IP-based detection can be done using the ranges mentioned above. The bot does not impersonate standard browsers—it always includes “Pluck” in the User-Agent.

📊 Data Usage

Data collected by Plucker is used exclusively for Pluck’s content aggregation and recommendation engine. The crawler pulls article titles, excerpts, metadata, and links to build a searchable index that powers widgets showing “Related Stories” or “Most Popular” on partner publisher sites. No personal or sensitive data is harvested, and stored content is limited to publicly visible pages. Usage of the data is governed by Pluck’s terms of service, which require attribution and link-back to the original source.

⚙️ Rate Limiting Policy

Although Plucker is polite and honors standard rate controls, webmasters often rate-limit it because it can continuously poll large sitemaps, consuming modest but noticeable bandwidth on high-traffic sites. Implementing a threshold-based block (e.g., restricting to 10 requests per minute per IP) is a safe practice to prevent any unintended resource exhaustion without penalizing legitimate indexing.

ⓘ 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.