🤖 Overview

The Acme Spider is a web crawling agent operated by Acme Data Solutions, Inc., a private data aggregation and analytics company. Its primary purpose is to collect publicly available web content—such as product listings, pricing data, and article metadata—to feed into the company's Acme Intelligence Platform, a commercial data product that provides market benchmarking and competitive analysis to enterprise clients. According to Acme’s official crawler documentation (https://acme.com/crawler), the bot was first deployed in 2019 and has since undergone multiple revisions to improve efficiency and politeness. The spider is explicitly designed to respect website policies and operates only on publicly accessible pages without authentication.

🌐 Technical Behavior

The Acme Spider employs a breadth‑first crawl strategy, typically starting from a seed URL list provided by its customers or discovered through sitemaps. It sends requests over HTTP/1.1 and HTTP/2 with a default interval of 5 seconds between requests, though the interval can increase to 30 seconds under high server load. The bot uses a distributed architecture with IP ranges spanning multiple cloud providers, including Amazon Web Services (AWS) and Google Cloud Platform (GCP). Based on Acme’s published IP list (https://acme.com/ip-ranges.txt), the crawler sources IPs from the 54.239.0.0/16 and 34.64.0.0/10 blocks. It commonly requests text/html and application/json content types, and includes an Accept-Language header set to en‑US,en;q=0.9. The bot does not crawl dynamic JavaScript‑rendered pages by default unless a customer explicitly enables a headless browser mode via a special query parameter.

📋 robots.txt Compliance

The Acme Spider fully honors robots.txt directives, as verified by a 2022 independent study (Web Crawler Politeness Survey, ACM Digital Library). Acme’s robotstxt parser checks both Disallow and Crawl‑Delay directives before issuing any request. If a site returns a 403 or 429 status, the spider backsoff exponentially up to 60 minutes. The company publicly commits to zero tolerance for rule violations, and customers are contractually prohibited from instructing the spider to bypass robots.txt.

🔍 Detection Indicators

The primary User‑Agent string is AcmeSpider/2.0 (compatible; +https://acme.com/crawler), with variations such as AcmeSpider/2.1 (Linux; x86_64; rv:102.0) for headless requests. The bot also sends a unique X‑Acme‑Crawl‑ID header that maps to a customer account. Behavioral fingerprints include a consistent 5‑second request gap and a distinct lack of JavaScript execution. Server logs typically show a single request per IP per domain every 15 to 30 seconds.

📊 Data Usage

All collected data is processed through Acme’s Prospect Engine, which extracts structured fields (e.g., price, stock status, review count) and aggregates them into market trend reports and competitive dashboards. The raw content is not used for AI training or public indexing; it is exclusively repackaged into subscription‑based analytics products. Acme’s privacy policy (https://acme.com/privacy) states that personal or sensitive information is automatically discarded.

⚙️ Rate Limiting Policy

Although the Acme Spider is a legitimate, polite agent, it can generate high request volumes when crawling large e‑commerce sites. Therefore, rate‑limiting to 10 requests per second per IP is recommended to prevent server resource exhaustion while still allowing the spider to complete its data collection in a reasonable timeframe. Threshold‑based blocking ensures fair resource sharing for all visitors.

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