🤖 Overview

Cowdog Bot is a legitimate web crawler operated by Cowdog, Inc., a company that provides large-scale, curated web datasets for training large language models (LLMs) and other AI systems. The bot was first publicly documented in late 2023 and its primary purpose is to collect publicly accessible text and metadata from websites to feed into Cowdog’s proprietary dataset products, which are sold to AI developers and research institutions. Unlike many general-purpose crawlers, Cowdog Bot focuses on extracting high-quality, diverse, and multilingual content while avoiding low-value or duplicated pages.

🌐 Technical Behavior

Cowdog Bot performs crawl requests using HTTP/1.1 and HTTP/2 protocols, with an average request rate of 2–5 requests per second per IP, though bursts can reach up to 10 requests per second during initial discovery phases. The crawler uses DNS-based load balancing across multiple IPv4 and IPv6 addresses, primarily sourced from Amazon Web Services (AWS) and Google Cloud Platform (GCP), with IP ranges documented in official Cowdog documentation (see cowdog.io/crawler). It employs a breadth-first crawl strategy, following links from seed URLs, and respects the Content-Type header, only fetching HTML, text, and supported document formats (PDF, DOC, TXT). The bot also sends a From header with an administrative contact email ([email protected]) and a User-Agent token for easy identification.

📋 robots.txt Compliance

Based on Cowdog’s official documentation and tests published by website operators, Cowdog Bot fully honors Disallow directives found in robots.txt files, including wildcard patterns and path-specific exclusions. The crawler checks robots.txt at the start of every crawl session and caches the result for up to 24 hours, re-checking if the file is modified. There are no reported cases of Cowdog Bot ignoring robots.txt rules, and the company explicitly states that compliance is enforced in its crawler policy.

🔍 Detection Indicators

The primary User‑Agent string is Cowdog Bot/1.0 (+https://cowdog.io/crawler.html), though older versions may appear as Cowdog Bot/0.9. Additional identifying headers include a custom X-Cowdog-Crawl header set to true and a From header with [email protected]. The bot also adds a comment in the User‑Agent referencing its official robot‑info page. Behavioral fingerprints: requests always include an Accept‑Language header of en‑US,en;q=0.9 and a Connection header set to keep‑alive.

📊 Data Usage

The collected data is used exclusively to build and refine Cowdog’s curated datasets, which are then licensed or sold to AI companies, academics, and enterprises for training large language models, improving natural language understanding, and enhancing search systems. Cowdog explicitly states it does not use the crawled content for advertising, surveillance, or any non‑AI purpose. The datasets are cleaned, deduplicated, and annotated to remove personal information and copyrighted material where possible, though the company advises website owners to contact them for takedown requests.

⚙️ Rate Limiting Policy

Cowdog Bot is rate‑limited because its high request volume (up to 10 req/s) can overwhelm smaller or less robust web servers, potentially degrading service for human users. Threshold‑based blocking (e.g., after 100 requests per minute from a single IP) is recommended in official documentation to protect server stability while still allowing the bot to complete its crawl within reasonable timeframes.

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