Eaight

An AI-native web browser that exposes a full Model Context Protocol (MCP) server, letting Claude Code, Codex CLI, and Gemini CLI see and control the browser in real time.

What it does

Eaight is a Chromium-based desktop browser built for AI-assisted workflows. It works like any browser for daily use, but runs a built-in MCP server that gives AI tools direct access to the page:

• 18 browser automation tools: navigate, click, type, scroll, screenshot, extract elements, execute JavaScript — all available as MCP tools

• 9 live resources: DOM, text content, accessibility tree, network logs, console output, cookies, screenshots — streamed to the AI in real time

• 5 interaction prompts: pre-built templates for page analysis, form filling, data extraction, and navigation

• Multi-transport: WebSocket and SSE transports run simultaneously for maximum compatibility

• Auto-discovery: Claude Code detects the browser automatically via a discovery file — no manual configuration needed

Beyond automation

• Tab management with groups

• Chrome extension support (install from Chrome Web Store)

• Prompt library with GitHub sync

• Custom new tab page with 3D animation

• Light/dark/system themes

• Security controls for MCP data sharing (screenshots, DOM, cookies — each toggleable)

Built with

• Desktop: Electron 28 + TypeScript

• Frontend: React 18 + Zustand + Tailwind CSS

• MCP: @modelcontextprotocol/sdk 1.0.4

• AI SDKs: @anthropic-ai/sdk 0.32.1

• Graphics: Three.js (new tab page animation)

• Build: Vite + electron-builder

Architecture

Claude Code / Codex / Gemini CLI
         │
         │ JSON-RPC (stdio or WebSocket)
         ▼
┌─────────────────────────────────┐
│  MCP Server (port 9222)         │
│                                 │
│  ┌───────────┐  ┌────────────┐  │
│  │ 18 Tools  │  │ 9 Resources│  │
│  │ navigate  │  │ dom        │  │
│  │ click     │  │ text       │  │
│  │ type      │  │ screenshot │  │
│  │ scroll    │  │ a11y tree  │  │
│  │ screenshot│  │ network    │  │
│  │ ...       │  │ console    │  │
│  └─────┬─────┘  └─────┬──────┘  │
│        │              │          │
│        ▼              ▼          │
│  ┌─────────────────────────┐    │
│  │  Tab Manager            │    │
│  │  (Electron BrowserView) │    │
│  └─────────────────────────┘    │
└─────────────────────────────────┘
         │
         ▼
┌─────────────────────────────────┐
│  React UI                       │
│  Tab Bar │ URL Bar │ AI Panel   │
│  Bookmarks │ Settings           │
└─────────────────────────────────┘

The MCP server runs inside the Electron main process with direct access to BrowserViews. A stdio bridge (mcp-stdio-bridge.ts) translates between Claude Code's stdio protocol and the internal WebSocket, so Claude Code can connect without network configuration.

Auto-discovery writes connection info to %APPDATA%/eaight/mcp-server.json, which Claude Code reads to find the browser.

Getting started

Prerequisites

• Node.js 18+

• Claude Code (to use the MCP integration)

Installation

npm install
npm run dev

The MCP server starts automatically on port 9222. Claude Code detects it via auto-discovery.

CLI

Control the browser from the command line:

node eaight-cli.js nav https://example.com
node eaight-cli.js text          # extract page text
node eaight-cli.js screenshot    # capture screenshot
node eaight-cli.js click "button.submit"

Configuration

Settings are available in the browser UI (gear icon):

• AI Settings: MCP server port, authentication mode

• Security: control what data is shared with AI (screenshots, DOM, cookies)

• Appearance: theme, AI panel position

License

MIT