← MCP servers · hangwin

Chrome Browser

BLOCKgrade F · trust 43/100

Chrome MCP Server is a Chrome extension-based Model Context Protocol (MCP) server that exposes your Chrome browser functionality to AI assistants like Claude, enabling complex browser automation, content analysis, and semantic search.

Overview

From the repository's own README, as read at the audited commit.

# Chrome MCP Server 🚀[![Stars](https://img.shields.io/github/stars/hangwin/mcp-chrome)](https://img.shields.io/github/stars/hangwin/mcp-chrome)[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)[![TypeScript](https://img.shields.io/badge/TypeScript-5.8+-blue.svg)](https://www.typescriptlang.org/)[![Chrome Extension](https://img.shields.io/badge/Chrome-Extension-green.svg)](https://developer.chrome.com/docs/extensions/)[![Release](https://img.shields.io/github/v/release/hangwin/mcp-chrome.svg)](https://img.shields.io/github/v/release/hangwin/mcp-chrome.svg)> 🌟 **Turn your Chrome browser into your intelligent assistant** - Let AI take control of your browser, transforming it into a powerful AI-controlled automation tool.**📖 Documentation**: [English](README.md) | [中文](README_zh.md)> The project is still in its early stages and is under intensive development. More features, stability improvements, and other enhancements will follow.---## 🎯 What is Chrome MCP Server?Chrome MCP Server is a Chrome extension-based **Model Context Protocol (MCP) server** that exposes your Chrome browser functionality to AI assistants like Claude, enabling complex browser automation, content analysis, and semantic search. Unlike traditional browser automation tools (like Playwright), **Chrome MCP Server** directly uses your daily Chrome browser, leveraging existing user habits, configurations, and login states, allowing various large models or chatbots to take control of your browser and truly become your everyday assistant.## ✨ New Features(2025/12/30)- **A New Visual Editor for Claude Code & Codex**, for more detail here: [VisualEditor](docs/VisualEditor.md)## ✨ Core Features- 😁 **Chatbot/Model Agnostic**: Let any LLM or chatbot client or agent you prefer automate your browser- ⭐️ **Use Your Original Browser**: Seamlessly integrate with your existing browser environment (your configurations, login states, etc.)- 💻 **Fully Local**: Pur

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.

claude-code
claude mcp add wasm-simd --env ANTHROPIC_AUTH_TOKEN=${ANTHROPIC_AUTH_TOKEN} --env CHROME_EXTENSION_KEY=${CHROME_EXTENSION_KEY} -- npx -y @chrome-mcp/[email protected]
claude-desktop
{
  "mcpServers": {
    "wasm-simd": {
      "command": "npx",
      "args": [
        "-y",
        "@chrome-mcp/[email protected]"
      ],
      "env": {
        "ANTHROPIC_AUTH_TOKEN": "${ANTHROPIC_AUTH_TOKEN}",
        "CHROME_EXTENSION_KEY": "${CHROME_EXTENSION_KEY}"
      }
    }
  }
}

Exposed tools (7) 7 read · 0 write · 0 destructive

ToolRiskDescription
AutoreadCursor auto-selects the best model
GPT-4.1readOpenAI model via Cursor
GPT-5.1readOpenAI high-quality reasoning model
GPT-5.2readOpenAI flagship reasoning model with extended effort support
TestreadA test flow
__MSG_extensionName__read__MSG_extensionDescription__
urlreadTarget URL

Details

Source
hangwin/mcp-chrome
npm
@chrome-mcp/wasm-simd@0.1.0
Transports
sse · stdio · streamable-http
Credentials it reads
ANTHROPIC_AUTH_TOKENCHROME_EXTENSION_KEY
License
MIT
Stars
12,405 · pushed 249d ago

Trust audit

Do not install this without reading the findings. The audit found something that could harm you or your machine.

LayerWhat it checksResult
L0Provenance & inventoryFAIL
L1Static analysis of the codeFAIL
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
declared (10 observation(s))
Network
declared (10 observation(s))
Shell
declared (10 observation(s))
Dependencies
not all pinned
Secrets in source
none-found

Findings (25)

HIGHInventory / provenance · inv.suspicious_name · CWE-1104
app/chrome-extension/entrypoints/web-editor-v2/core/payload-builder.ts
payload-builder.ts
Why it matters. member named after an attack tool
Fix. remove or justify
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
app/chrome-extension/entrypoints/background/record-replay/actions/handlers/extract.ts:93
const fn = new Function(code);
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
app/chrome-extension/entrypoints/background/record-replay/actions/handlers/script.ts:118
const fn = new Function(...argNames, wrappedCode);
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
app/chrome-extension/entrypoints/background/record-replay/nodes/conditional.ts:18
const fn = new Function(
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
app/chrome-extension/entrypoints/background/record-replay/nodes/conditional.ts:40
const fn = new Function(
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
app/chrome-extension/entrypoints/background/tools/browser/inject-script.ts:201
func: (code) => new Function(code)(),
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHNetwork egress · net.tls_off · CWE-200, CWE-319
app/chrome-extension/inject-scripts/element-marker.js:1696
{ color = CONFIG.COLORS.HOVER, dashed = true, offsetX = 0, offsetY = 0, isVerify = false } = {},
Why it matters. certificate verification is disabled
Fix. leave verification on
HIGHNetwork egress · net.tls_off · CWE-200, CWE-319
app/chrome-extension/inject-scripts/element-marker.js:1737
function drawRects(elements, color = CONFIG.COLORS.HOVER, dashed = true, isVerify = false) {
Why it matters. certificate verification is disabled
Fix. leave verification on
MEDIUMInventory / provenance · inv.binary · CWE-1104
app/chrome-extension/workers/simd_math_bg.wasm
simd_math_bg.wasm
Why it matters. a compiled or binary member cannot be reviewed from source
Fix. ship source, or explain the binary in the README
MEDIUMNetwork egress · net.raw_ip · CWE-200, CWE-319
app/chrome-extension/entrypoints/background/quick-panel/agent-handler.ts:242
const url = `http://127.0.0.1:${port}/agent/sessions/${encodeURIComponent(sessionId)}`;
MEDIUMNetwork egress · net.raw_ip · CWE-200, CWE-319
app/chrome-extension/entrypoints/background/quick-panel/agent-handler.ts:324
const sseUrl = `http://127.0.0.1:${request.port}/agent/chat/${encodeURIComponent(request.sessionId)}/stream`;
MEDIUMNetwork egress · net.raw_ip · CWE-200, CWE-319
app/chrome-extension/entrypoints/background/quick-panel/agent-handler.ts:423
const url = `http://127.0.0.1:${request.port}/agent/chat/${encodeURIComponent(request.sessionId)}/act`;
LOWInventory / provenance · inv.hidden_file · CWE-1104
.prettierignore
.prettierignore
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWInventory / provenance · inv.hidden_file · CWE-1104
.prettierrc.json
.prettierrc.json
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
app/chrome-extension/entrypoints/background/record-replay-v3/engine/kernel/artifacts.ts:6
import type { NodeId, RunId } from '../../domain/ids';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
app/chrome-extension/entrypoints/background/record-replay-v3/engine/kernel/artifacts.ts:7
import type { RRError } from '../../domain/errors';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
app/chrome-extension/entrypoints/background/record-replay-v3/engine/kernel/artifacts.ts:8
import { RR_ERROR_CODES, createRRError } from '../../domain/errors';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
app/chrome-extension/entrypoints/background/record-replay-v3/engine/kernel/breakpoints.ts:6
import type { NodeId, RunId } from '../../domain/ids';
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
app/chrome-extension/entrypoints/background/record-replay-v3/engine/kernel/breakpoints.ts:7
import type { Breakpoint, DebuggerState } from '../../domain/debug';
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:103
"url": "http://127.0.0.1:12306/mcp"
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README_zh.md:101
"url": "http://127.0.0.1:12306/mcp"
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
app/chrome-extension/entrypoints/background/tools/browser/gif-recorder.ts:1127
const byteChars = atob(base64Data);
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
app/chrome-extension/inject-scripts/network-helper.js:44
const decodedString = atob(base64);
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
app/chrome-extension/package.json
@modelcontextprotocol/sdk, @vue-flow/background, @vue-flow/controls, @vue-flow/core, @vue-flow/minimap, @xenova/transformers, date-fns, elkjs
Why it matters. 25 dependency range(s) float
Fix. pin exact versions or ship a lockfile
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
app/native-server/package.json
@anthropic-ai/claude-agent-sdk, @fastify/cors, @modelcontextprotocol/sdk, better-sqlite3, chalk, chrome-devtools-frontend, commander, drizzle-orm
Why it matters. 29 dependency range(s) float
Fix. pin exact versions or ship a lockfile

Gates applied: no_behavioural_pass.

Audited 2026-09-13 · audit v0.4.0 · source sha 54eb663ae58f · full audit: observations/trust-audit/mcp-server/hangwin__chrome-browser.json · Report an issue or request a re-scan

Audit history

DateSourceVerdictGradeScoreChange
2026-09-1354eb663ae58fBLOCKF43first audit

Also audited

Servers with a similar trust profile.

Questions

What is the Chrome Browser MCP server?

Chrome MCP Server is a Chrome extension-based Model Context Protocol (MCP) server that exposes your Chrome browser functionality to AI assistants like Claude, enabling complex browser automation, content analysis, and semantic search.

What tools does Chrome Browser expose?

7 in total: 7 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is Chrome Browser safe to connect to an agent?

No — not without reading the findings first. The audit graded it F (43/100) and found 8 critical or high issues in the source. Each one is listed on this page with the file and line it is on.

What credentials does Chrome Browser need?

It reads ANTHROPIC_AUTH_TOKEN and CHROME_EXTENSION_KEY from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.

How does Chrome Browser run?

It speaks sse, stdio and streamable-http, so it runs as a local process your client starts. It is published on npm as @chrome-mcp/wasm-simd at 0.1.0.

How current is this page?

The grade is for one exact copy of the source (54eb663ae58f), read on 2026-09-13. The repository is watched and re-audited when it changes.

Provenance: OBSERVED · read 2026-09-13 · job trust-audit-2026-09-13