ShardBrowser

A free, open-source anti-detect browser launcher for web scraping and multi-accounting. Patched Chromium 152 with engine-level fingerprint spoofing, a local API, an MCP server and SDKs.

Overview · Features · Screenshots · Comparison · Install · Usage

ShardX is built by the ProxyShard team. ProxyShard provides full SOCKS5 UDP relay support (RFC 1928 §7) and active p0f TCP fingerprint spoofing at the proxy exit. This keeps the operating system presented by the proxy consistent with the SYN/ACK shape seen by websites. ShardX is the anti-detect browser stack built to use those capabilities. The launcher manages profiles, binds proxies and ships a patched Chromium 152 build that applies fingerprint changes inside the browser engine.

Website · Documentation · Browser guide · UDP relay · p0f spoofing

ShardX provides four ways to control the same profiles. They all use the same local state, so no additional synchronization is required:

• Desktop UI: workspace for daily work with profiles, proxies, cookies and the fingerprint editor.
• Local HTTP API: Bearer JWT authentication on 127.0.0.1:40325. Create, start and stop profiles from any language, then obtain a CDP endpoint.
• MCP server: connects ShardX to Claude Desktop, Cursor and other MCP clients for natural-language profile orchestration through the HTTP API and CDP.
• Standalone SDKs: Python, Node and Rust libraries that ship the browser engine and run without the desktop UI. They are intended for scrapers, CI jobs and servers.

Configuration details are available in Usage.

  <source media="(prefers-color-scheme: dark)" srcset="docs/screenshots/00-launcher-dark.png">
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  <img src="docs/screenshots/00-launcher-light.png" alt="ShardX Launcher with active browser profiles" width="920">

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What it is

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