SkillFoxx

YX Bridge: an agent bridge to the browser

YX Bridge

A browser extension and local MCP server with 254 tools: the agent reads and changes the DOM, clicks and runs JS in Yandex Browser and Chromium tabs

  • 0 ★ on the repository
  • Last commit
  • Apache-2.0
MCP server

Broad access

Why this level

  • The agent can run arbitrary JavaScript and fill and submit forms in real tabs with the user's active login sessions
  • Access extends to every open tab, including email, banking and other sensitive services if they are open
All reasons and checks
Russian stack

mrsuperkosmos/yx-bridgeAuthor:MRsuperkosmos

Install

Manual install

cd server
npm install
claude mcp add yx-bridge -s user -- node "<full path>/server/src/server.js"

The README's manual server registration for Claude Code.

Access and checks

How we review

Broad accessThe tool can change data, run commands or handle secrets.

  • The agent can run arbitrary JavaScript and fill and submit forms in real tabs with the user's active login sessions
  • Access extends to every open tab, including email, banking and other sensitive services if they are open

This is third-party code. Review the repository files before installing.

What it does

The pair of a browser extension and a local MCP server gives an agent direct access to open tabs in Yandex Browser or any Chromium browser: reading the page, changing the DOM, clicking and typing, running arbitrary JavaScript, screenshots, raw DevTools Protocol commands, controlling Yandex Browser's auto-translation and the browser's own UI. Communication stays local over WebSocket between the extension and the server, with no accounts and no external servers. The extension icon has a pause toggle that stops data flowing to the agent, and an optional local password that locks the port to its own extension only. All 254 tools cover tabs, the DOM, input, JavaScript, screenshots, DevTools, browser memory and window control.

Who it is for. For people who want to give an agent direct control over their already-open browser: reading pages, form automation, DevTools-level debugging.

Good fit when

  • You want the agent to read, click and fill forms in a real, already-logged-in browser
  • You need DevTools Protocol access and arbitrary JavaScript on the page
  • You work in Yandex Browser and want to control its auto-translation from the agent

Not a fit when

  • You do not want to give the agent access to tabs with live logins to banking, email or other sensitive services
  • You need headless automation without the user's real browser, such as Playwright

Example request

Read the open tab, remove the cookie banner, and take a full-page screenshot

MCP

Transport
stdio
Authentication
not required

Limitations

It only works on Windows, macOS and Linux with Node.js 18 installed and a Chromium-compatible browser. Full UI Automation control is Windows-only. The extension must be loaded manually in developer mode on macOS and Linux. The tool's power is directly proportional to its risk: the agent gets access to every tab you have open, including logins to any service.

How to disable. Click pause on the extension icon to temporarily stop data flow, or run uninstall.cmd (Windows), or manually remove the extension from the browser and the server registration.

FAQ

Does data leave to an external server?

No, communication stays local between the extension and the server on your machine, with no accounts and no external servers.

How do I quickly stop the agent if it does something wrong?

Click the pause toggle on the extension icon; it instantly stops data flowing to the agent.

Discussion

No questions or reviews yet.

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README in short

The bilingual README explains the local WebSocket architecture, three install paths, one-click on Windows, agent-driven install via AGENT-INSTALL.md, and manual, gives example agent phrases, describes the pause toggle and password on the extension icon, and tables of all 254 tools by category.

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