BuddyBot
Bot User-Agent:buddybot
🤖 Overview
BuddyBot is a legitimate web crawler operated by the U.S.‑based web monitoring company Buddy (formerly Buddy.com), first documented in 2018. Its primary purpose is to systematically visit customer‑submitted URLs to detect content changes, track uptime, and provide real‑time alerts for website modifications. Unlike general‑purpose search engine bots, BuddyBot is specifically designed for change‑detection and performance monitoring services, feeding data into the Buddy dashboard and notification systems. The crawler is explicitly described in Buddy’s official documentation as a “non‑malicious, automated agent” that respects industry standards.
🌐 Technical Behavior
BuddyBot employs a scheduled crawling pattern, visiting each configured URL at intervals ranging from every 5 minutes to once per week, depending on the customer’s monitoring plan. It uses HTTP/1.1 and HTTP/2 protocols, fetching pages with a default request frequency of one request every 2–3 seconds per target domain to avoid overwhelming servers. The crawler operates from a dynamic pool of IP addresses owned by Buddy, primarily within the 104.16.0.0/12 and 172.64.0.0/13 ranges (Cloudflare’s infrastructure, as Buddy often uses Cloudflare for distribution). It sends a Via header indicating “BuddyCrawler” and includes a From header with a contact email. The bot does not execute JavaScript unless explicitly configured for a “headless browser” check, making it lightweight and respectful of bandwidth.
📋 robots.txt Compliance
BuddyBot fully honors robots.txt directives, as confirmed in Buddy’s official support pages. It reads the file before each crawl session and will not access any URL blocked by a Disallow rule. The company publicly advises customers to use standard User‑agent: BuddyBot and Disallow lines to control access. Multiple independent security blogs and webmaster forums verify that BuddyBot has never been observed bypassing robots.txt restrictions.
🔍 Detection Indicators
The primary User‑Agent string is BuddyBot/1.0 (with minor version increments, e.g., BuddyBot/1.1). Additionally, BuddyBot sends a X‑Forwarded‑For header when proxied and a custom X‑Buddy‑Crawl‑ID header containing a UUID for tracing. It also includes a Referer header set to https://www.buddy.com on every request. Behavioral fingerprints include sequential Accept‑Encoding values (gzip, deflate, br) and a Connection: keep‑alive header. The bot never sets cookies or supports session persistence.
📊 Data Usage
Collected data—specifically HTTP response status codes, full page HTML snapshots, and hash‑based change fingerprints—are used exclusively for Buddy’s website change detection and uptime monitoring service. The data is stored temporarily (up to 30 days) and is not used for AI training, search indexing, or advertising. Buddy’s privacy policy explicitly states that content is not shared with third parties and is only accessible to the subscribing customer.
⚙️ Rate Limiting Policy
Because BuddyBot can deliver a high volume of requests across many customer sites simultaneously, it is rate‑limited at the edge to protect against accidental resource exhaustion. The policy imposes a cap of 10 requests per second per IP and automatically backs off if servers respond with 429 or 503 status codes, ensuring the crawler behaves politely under all conditions.
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