🤖 Overview

Owsbot (short for Open Web Search Bot) is a legitimate, non-malicious web crawler operated by the Open Web Search project (https://openwebsearch.eu), a European Union‑funded research initiative coordinated by Leibniz University Hannover. Its primary purpose is to build an open, transparent, and decentralized index of the web for academic research, innovation, and public benefit, thereby reducing dependency on proprietary search engines. The data feeds into the Open Web Index (OWI), which supports studies in information retrieval, natural language processing, and web science. Owsbot was first deployed in 2021 and continuously crawls public web content under a strict ethical and legal framework.

🌐 Technical Behavior

Owsbot uses a systematic, depth‑first crawl strategy, starting from seed URLs provided by the project’s web corpus. It respects standard HTTP protocols: it sends GET requests with Accept‑Encoding: gzip, deflate and processes robots.txt before each crawl. Request frequency is typically one request every 2–5 seconds per domain, but can be slower if the server responds with throttling signals (e.g., 429 status codes). The crawler originates from a fixed set of IP ranges that are publicly documented on the project’s website (currently 134.106.48.0/24, 192.54.222.0/24, and others assigned by the university). All requests carry a descriptive User‑Agent string (see Detection Indicators) and do not spoof or impersonate other bots. Owsbot respects Cache‑Control and ETag headers to avoid redundant downloads.

📋 robots.txt Compliance

According to the official Open Web Search documentation (https://openwebsearch.eu/crawler/), Owsbot strictly adheres to robots.txt directives, including Disallow, Allow, and Crawl‑Delay rules. It recaches the robots.txt file periodically (every 24 hours) and immediately honors any Disallow path or host‑level exclusions. The project encourages webmasters who wish to block Owsbot entirely to add User‑agent: Owsbot to their robots.txt. There is no documented evidence that Owsbot ignores or overrides these directives.

🔍 Detection Indicators

The primary User‑Agent string is Owsbot/1.0 (with optional comment https://openwebsearch.eu/crawler/). Additional variants may include OwsBot/1.0 (case‑sensitive) and OpenWebSearchBot/1.0. The bot also sends the header From: [email protected] for contact. Behavioral fingerprints include consistent request intervals, a lack of JavaScript or cookie support, and a single IP per crawl session. It does not spoof other browsers or bots.

📊 Data Usage

Data collected by Owsbot is stored in the Open Web Index, which is freely accessible for non‑commercial research and education. The index powers applications such as the Open Search Foundation’s tools and serves as a training corpus for AI models built by academic groups. Individual pages are stored in compressed WARC format, and metadata (links, titles, timestamps) is extracted for search indexing. The project explicitly states that no data is sold or used for advertising.

⚙️ Rate Limiting Policy

Webmasters may rate‑limit Owsbot if its crawl activity impacts server performance, as it operates on an ethical schedule but can generate thousands of requests per day across a site. The policy rationale for threshold‑based blocking is that aggressive crawling, while legitimate, may degrade service for human users; therefore, a rate limit of 5–10 requests per second per IP is a reasonable mitigation, and Owsbot will respect Retry‑After headers if returned.

ⓘ 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.