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agent-browser

MCP server · npm · ★ 14 · graded 2026-10-23Source linked

Self-hosted Chrome for AI agents, with a live noVNC view a human can take over.

1 outside report on file

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

Based on public adoption and transparency signals as of Oct 23, 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 (aether-browser)PUBLIC

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

Install

npx -y aether-browser

All setup options ↓

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About Agent Browser

Agent Browser is an MCP server focused on Web & browsing: Self-hosted Chrome for AI agents, with a live noVNC view a human can take over.

It is published on npm as aether-browser and published on PyPI as aether-browser and hosted on GitHub at AetherAI3/agent-browser (14 GitHub stars, 22 weekly npm downloads, 20 PyPI downloads, last repository push on 2026-10-20). Based on its public metadata, its operational scope includes: fetches arbitrary web urls.

Setup

These use the package this listing points to. Check the project’s own instructions before running anything.

npm command

npx -y aether-browser

PyPI command

uvx aether-browser

PyPI (pip) command

pip install aether-browser

MCP client config

For Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json).

json
{
  "mcpServers": {
    "aether-browser": {
      "command": "npx",
      "args": [
        "-y",
        "aether-browser"
      ]
    }
  }
}

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

26/100
GitHub stars
14
Weekly npm downloads
22
PyPI downloads
20
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

Reports from our research that name this package. We list them as published and do not rate them.

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 (aether-browser). 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 Agent Browser?

Run npx -y aether-browser (or uvx aether-browser) 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/AetherAI3/agent-browser.

Are there security reports about Agent Browser?

1 report was found for this package in our research. Titles and dates (MalSkillBench benchmark samples) are listed in the Reports section above. Agent Browser currently holds Grade D (High risk signals) based on public adoption and transparency signals. Review the permissions and source repository before granting access to local files, shell commands, or API keys.

Is Agent Browser actively maintained?

Agent Browser has 14 GitHub stars and 22 weekly npm downloads, with its latest repository commit pushed on 2026-10-20. Our directory data was last refreshed on 2026-10-28. Check recent commit activity, release tags, and open issues at github.com/AetherAI3/agent-browser before pinning it in production.

What are alternatives to Agent Browser?

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

README badge and team notes

Maintain or use Agent Browser? 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 Agent Browser

GitHub README Markdown:

markdown
[![AgentArmorHQ Risk Grade for Agent Browser](https://agentarmorhq.com/api/badge/aetherai3-agent-browser)](https://agentarmorhq.com/skills/aetherai3-agent-browser)

HTML embed:

html
<a href="https://agentarmorhq.com/skills/aetherai3-agent-browser"><img src="https://agentarmorhq.com/api/badge/aetherai3-agent-browser" alt="AgentArmorHQ Risk Grade for Agent Browser" height="20" /></a>

Terminal check:

terminal
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "aetherai3-agent-browser"

Share with your security lead

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

### AgentArmorHQ Security Review Memo: agent-browser
- **Listing URL:** https://agentarmorhq.com/skills/aetherai3-agent-browser
- **Type:** App connector
- **Risk Grade:** Grade D (High risk signals)
- **Outside Security Advisories on File:** 1
- **Public Adoption:** 14 GitHub stars, 22 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 (aether-browser)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts aether-browser`
- **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 23, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type
App connector
Publisher
AetherAI3
Source code
github.com/AetherAI3/agent-browser
Install command
npm install aether-browser
Est. context load
~850 tokens / turn (~5 tool schemas, 0.43% of 200k context)
Popularity
14 GitHub stars, 22 weekly npm downloads, 20 PyPI downloads
Last updated
2026-10-28
Last graded
2026-10-23

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