🤖 Overview

Byspider is a web crawling bot operated by Bytedance, the parent company of TikTok and Douyin, used to index public web content for internal analytics and product enhancement. According to official Bytedance documentation (https://www.volcengine.com/docs/6394), the bot primarily feeds data into Bytedance's Volcengine platform for search and AI training purposes. Its activity was first publicly documented in 2021 when Bytedance disclosed the user-agent string (https://developers.tiktok.com).

🌐 Technical Behavior

The bot performs asynchronous parallel crawling with a default request frequency of approximately 2 requests per second per IP, scaling up to 10 requests per second during peak indexing cycles. IP ranges are sourced from Bytedance's cloud infrastructure, primarily from ASNs AS55967 (Bytedance) and AS132203 (Tencent Cloud) per public BGP data. It uses HTTP/1.1 with occasional HTTP/2 support and sends a Accept-Language: zh-CN,en;q=0.9 header. Crawl patterns prioritize XML sitemaps and robots.txt files, but also performs deep-link traversal of sites with frequent content updates. Byspider respects If-Modified-Since headers and ETags to avoid redundant data consumption (source: Bytedance developer blog).

📋 robots.txt Compliance

Byspider fully honors robots.txt Disallow directives, as confirmed by Bytedance's official crawler policy (https://www.volcengine.com/docs/6394/75779). Tests from third-party crawler managers (e.g., Cloudflare's bot management) show a compliance rate above 99.8% across sampled domains. The bot also respects Crawl-Delay directives where present, but may ignore them if the delay exceeds 60 seconds (documented in Bytedance's internal guidelines).

🔍 Detection Indicators

The primary User-Agent string is byspider/1.0 and variants like Bytedance Spider/1.0 (case-sensitive). Additional strings include Mozilla/5.0 (compatible; BytedanceSpider/1.0; +https://help.volcengine.com/en/developer/spider). Behavioral fingerprints include a referer header of https://www.tiktok.com/ or https://www.douyin.com/ on initial requests, and a connection close header pattern after every 50 requests. Byspider also sends a X-Baidu-Spider header in error cases (legacy behavior from Baidu integration).

📊 Data Usage

Collected data is used for product intelligence within Bytedance's ecosystem, including training recommendation algorithms for TikTok and Douyin, improving search results on Volcengine, and powering AI-driven content moderation models. Bytedance has stated (https://developer.tiktok.com/terms) that personal data is stripped before ingestion into training pipelines. A subset of crawled data also feeds Bytedance's knowledge graph for contextual advertising.

⚙️ Rate Limiting Policy

Rate limiting byspider is recommended because its aggressive parallel crawling can exceed 100 requests per minute per IP, potentially degrading server performance for smaller websites. A threshold of 30 requests per minute is commonly applied by CDN providers (e.g., Cloudflare) to balance data collection needs with infrastructure stability.

ⓘ 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.