mcpbrowser

MCP server · npm · ★ 9 · graded 2026-10-20Source linked

MCP browser server — loads and interacts with web pages using the user's Chromium-based browser with full JavaScript execution. Handles authentication, SSO, and anti-bot protection automatically via the user's existing browser session.

No outside reports on file

mcpbrowser fetches arbitrary web URLs; restrict its folder reach, network access, and credentials before installing.

Based on public adoption and transparency signals as of Oct 19, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionNo shell command runner notedLOW
Network reachFetches arbitrary web URLsREVIEW
CredentialsNo API token requiredLOW
Package sourcenpm (mcpbrowser)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y mcpbrowser

All setup options ↓

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About Mcpbrowser

Mcpbrowser is an MCP server focused on Web & browsing and Cloud & infrastructure: MCP browser server — loads and interacts with web pages using the user's Chromium-based browser with full JavaScript execution. Handles authentication, SSO, and anti-bot protection automatically via the user's existing browser session.

It is published on npm as mcpbrowser and hosted on GitHub at cherchyk/mcpbrowser (9 GitHub stars, 295 weekly npm downloads, last repository push on 2026-10-12). Based on its public metadata, its operational scope includes: fetches arbitrary web urls.

Setup

Check these steps against the project’s own instructions before running anything.

Run mcpbrowser with --ignore-scripts in claude_desktop_config.json or .cursor/mcp.json:

json

{
  "mcpServers": {
    "mcpbrowser": {
      "command": "npx",
      "args": ["-y", "--ignore-scripts", "mcpbrowser"]
    }
  }
}

Why this grade

DD — High risk signals

Signal-based grade (1/7 points): public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

36/100

GitHub stars: 9
Weekly npm downloads: 663
Listing last refreshed: 2026-10-28

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Security reports

No reports found for this package in our research (last checked 2026-10-29).

Check a specific version →

Risks to watch for

Untrusted web content & prompt injection: Fetches arbitrary web pages or remote endpoints where hidden instructions could manipulate agent behavior. Restrict outbound domains and review tool outputs.
Dependency & version pinning: Distributed via npm (mcpbrowser). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install Mcpbrowser?

Run npx -y mcpbrowser in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page. Full setup docs and environment variables are in github.com/cherchyk/mcpbrowser.

Are there security reports about Mcpbrowser?

No reports found for this package in our research (last checked 2026-10-29). Mcpbrowser currently holds Grade D (High risk signals) based on public adoption and transparency signals. Key risk areas to watch include untrusted web content & prompt injection:, dependency & version pinning:.

Is Mcpbrowser actively maintained?

Mcpbrowser has 9 GitHub stars and 663 weekly npm downloads, with its latest repository commit pushed on 2026-10-12. Our directory data was last refreshed on 2026-10-28. Check recent commit activity, release tags, and open issues at github.com/cherchyk/mcpbrowser before pinning it in production.

What are alternatives to Mcpbrowser?

You can compare Mcpbrowser side by side with other Browser MCP servers in the Related tools section on this page, or use the Compare tool on AgentArmorHQ.

Maintain or use Mcpbrowser? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade D for Mcpbrowser

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Mcpbrowser](https://agentarmorhq.com/api/badge/cherchyk-mcpbrowser)](https://agentarmorhq.com/skills/cherchyk-mcpbrowser)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/cherchyk-mcpbrowser"><img src="https://agentarmorhq.com/api/badge/cherchyk-mcpbrowser" alt="AgentArmorHQ Risk Grade for Mcpbrowser" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "cherchyk-mcpbrowser"

Share with your security lead

Need sign-off to use mcpbrowser? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: mcpbrowser
- **Listing URL:** https://agentarmorhq.com/skills/cherchyk-mcpbrowser
- **Type:** App connector
- **Risk Grade:** Grade D (High risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 9 GitHub stars, 663 weekly npm downloads

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Fetches arbitrary web URLs
- **Credentials:** No API token required
- **Package source:** npm (mcpbrowser)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts mcpbrowser`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 19, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Publisher: cherchyk
Source code: github.com/cherchyk/mcpbrowser
Install command: npm install mcpbrowser
Est. context load: ~550 tokens / turn (~3 tool schemas, 0.27% of 200k context)
Popularity: 9 GitHub stars, 663 weekly npm downloads
Last updated: 2026-10-28
Last graded: 2026-10-20

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