Dev Tools & GitMCP RegistrynpmA · 82

agent-browser MCP server

Name: agent-browser
Author: AetherAI3

io.github.AetherAI3 · Updated 1mo ago

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

At a glance

agent-browser is an MCP server in the Dev Tools & Git category. It runs locally over stdio via `npx -y aether-browser mcp`, and needs AGENT_BROWSER_CONTROLLER_TOKEN and AGENT_BROWSER_OBSERVER_TOKEN. It scores A (82/100) on the MCP Skills Hub health score as of Oct 28, 2026.

Source 14

One-click install

VS Code VS Code Insiders Cursor

Opens your editor and pre-fills the config. Your editor will ask before adding it.

How to install agent-browser in your AI client

Setup for Claude Code, Claude Desktop, Cursor, Codex, Windsurf, Cline and VS Code — copy-paste ready.

How to install agent-browser in Claude CodeAnthropic's agentic CLI

Add the server

bash

claude mcp add agent-browser -e 'AGENT_BROWSER_CONTROLLER_TOKEN=<AGENT_BROWSER_CONTROLLER_TOKEN>' -e 'AGENT_BROWSER_OBSERVER_TOKEN=<AGENT_BROWSER_OBSERVER_TOKEN>' -- npx -y aether-browser mcp

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
3
Verify it's connected
bash
```
claude mcp list
```
Sharing it with your team?
Add `--scope project` to write it to .mcp.json in the repository root, which you can commit (with the secrets left as environment variables).
Use it in a session
Ask Claude to use the tools this server exposes. It discovers them automatically.

How to install agent-browser in Claude DesktopDesktop app (MCP config)

Open your MCP config
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

Add this server

json

{
  "mcpServers": {
    "agent-browser": {
      "command": "npx",
      "args": [
        "-y",
        "aether-browser",
        "mcp"
      ],
      "env": {
        "AGENT_BROWSER_CONTROLLER_TOKEN": "<AGENT_BROWSER_CONTROLLER_TOKEN>",
        "AGENT_BROWSER_OBSERVER_TOKEN": "<AGENT_BROWSER_OBSERVER_TOKEN>"
      }
    }
  }
}

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
Restart Claude Desktop
The tools appear under the 🔌 menu once the app reloads.

How to install agent-browser in CursorAI-first code editor

Create / edit .cursor/mcp.json in your project

json

{
  "mcpServers": {
    "agent-browser": {
      "command": "npx",
      "args": [
        "-y",
        "aether-browser",
        "mcp"
      ],
      "env": {
        "AGENT_BROWSER_CONTROLLER_TOKEN": "<AGENT_BROWSER_CONTROLLER_TOKEN>",
        "AGENT_BROWSER_OBSERVER_TOKEN": "<AGENT_BROWSER_OBSERVER_TOKEN>"
      }
    }
  }
}

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
Enable it
Cursor Settings → MCP → toggle the server on. Tools become available to the Composer/Agent.

How to install agent-browser in Codex CLIOpenAI coding agent

Add to ~/.codex/config.toml

toml

[mcp_servers.agent-browser]
command = "npx"
args = ["-y", "aether-browser", "mcp"]
env = { AGENT_BROWSER_CONTROLLER_TOKEN = "<AGENT_BROWSER_CONTROLLER_TOKEN>", AGENT_BROWSER_OBSERVER_TOKEN = "<AGENT_BROWSER_OBSERVER_TOKEN>" }

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
Run Codex
Codex loads MCP servers from config.toml on startup and exposes their tools to the agent.

How to install agent-browser in WindsurfCodeium's agentic IDE

Edit ~/.codeium/windsurf/mcp_config.json

json

{
  "mcpServers": {
    "agent-browser": {
      "command": "npx",
      "args": [
        "-y",
        "aether-browser",
        "mcp"
      ],
      "env": {
        "AGENT_BROWSER_CONTROLLER_TOKEN": "<AGENT_BROWSER_CONTROLLER_TOKEN>",
        "AGENT_BROWSER_OBSERVER_TOKEN": "<AGENT_BROWSER_OBSERVER_TOKEN>"
      }
    }
  }
}

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
Reload
Windsurf → Cascade → refresh MCP servers. Cascade can now call the tools.

How to install agent-browser in ClineVS Code autonomous agent

Open Cline → MCP Servers → Configure
Adds to cline_mcp_settings.json.

Add the server

json

{
  "mcpServers": {
    "agent-browser": {
      "command": "npx",
      "args": [
        "-y",
        "aether-browser",
        "mcp"
      ],
      "env": {
        "AGENT_BROWSER_CONTROLLER_TOKEN": "<AGENT_BROWSER_CONTROLLER_TOKEN>",
        "AGENT_BROWSER_OBSERVER_TOKEN": "<AGENT_BROWSER_OBSERVER_TOKEN>"
      }
    }
  }
}

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.

How to install agent-browser in VS CodeCopilot / MCP support

Create .vscode/mcp.json

json

{
  "servers": {
    "agent-browser": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "aether-browser",
        "mcp"
      ],
      "env": {
        "AGENT_BROWSER_CONTROLLER_TOKEN": "<AGENT_BROWSER_CONTROLLER_TOKEN>",
        "AGENT_BROWSER_OBSERVER_TOKEN": "<AGENT_BROWSER_OBSERVER_TOKEN>"
      }
    }
  }
}

Fill in your credentials
Replace <AGENT_BROWSER_CONTROLLER_TOKEN>, <AGENT_BROWSER_OBSERVER_TOKEN> with your real values. Keep secrets out of any config file you commit.
Start it
VS Code shows a ▶ Start action above the server entry. Agent mode (Copilot Chat) can then use the tools.

What does agent-browser need from you?

API key — Controller token, if the server runs authenticated.

AGENT_BROWSER_URLoptionalEnvironment variable
Base URL of your Agent Browser server. Defaults to http://127.0.0.1:8092.
AGENT_BROWSER_CONTROLLER_TOKENoptionalsecretEnvironment variable
Controller token, if the server runs authenticated.
AGENT_BROWSER_OBSERVER_TOKENoptionalsecretEnvironment variable
Observer token for read-only health and snapshot calls.
AGENT_BROWSER_URLoptionalEnvironment variable
Base URL of your Agent Browser server. Defaults to http://127.0.0.1:8092.
AGENT_BROWSER_CONTROLLER_TOKENoptionalsecretEnvironment variable
Controller token, if the server runs authenticated.
AGENT_BROWSER_OBSERVER_TOKENoptionalsecretEnvironment variable
Observer token for read-only health and snapshot calls.

Pass secrets through your shell environment rather than committing them into a config file.

What tools does agent-browser expose?

This server runs as a local package. We only query remote servers for their tool list — asking this one would mean executing it, so its tools are listed in the documentation below.

What the code can do

Read from the published package source — never executed. Parsed 3 of 3 source files.

This server can run other programs on your machine, read and write files and read your environment variables.

How it was published

Has a provenance attestation tying this artifact to the commit it was built from.
1 npm maintainer — a single point of compromise · last published by ather-ai-llc.

Maintainer of this package and think something here is wrong? Tell us and we'll correct it.

Before you install

Signals gathered from the source repo and package registry — not a safety verdict.

What it can reach

Runs code on your machine — Executes as a local process with your user's permissions, including filesystem access.
Downloads at launch — The package is fetched from its registry each run unless you pin a version.

Last commit 1 day ago — Actively maintained.
14 GitHub stars — Community adoption signal.
31 weekly downloads — Very few installs — you would be an early user.

Client compatibility

Claude Code: NativeClaude Desktop: NativeCursor: NativeCodex CLI: NativeWindsurf: NativeCline: NativeVS Code: Native

Health score

A · 82

Maintenance, adoption, transparency and packaging — not a safety audit. How this is calculated

Maintenance30%100%
Last commit 1 day ago.
Adoption20%35%
14 stars, 31 weekly downloads.
Transparency20%75%
3/4: ✓ public source repo, ✓ declared license, ✓ documentation, ✗ discoverable tool list.
Provenance15%100%
Package and registry entry point at the same repository.
Packaging15%100%
Publishes a pinned version (0.2.2).

Documentation

Full README

Agent Browser See what your agent sees.

Self-hosted Chrome for AI agents. Your agent drives one real browser session — and you can watch it happen, and step in.

Quickstart · API · MCP · Security model · Node client · Python client · Contributing · Changelog

<sub> An 18-second recorded demonstration. The agent signs in, reaches a 2FA prompt it has no way to answer, and stops. A human types the code into <strong>the displayed session</strong>, then the agent continues. Capture provenance, checksums, and independently verifiable limits are documented.  ·  How this was recorded </sub>

Why this exists

Most browser tooling for agents hands the model a browser you cannot see. When it misreads a page or stalls on a login, all you get is a transcript and a guess.

Agent Browser runs one headed Chrome session. Your agent drives it through a small JSON API, and a live view of that same session sits open in front of you. When the agent gets stuck, you take over in the window it is already using — then hand it back.

Start the runtime:

bash

docker compose up --build

Then reach it however you like:

bash

npm install aether-browser    # TypeScript
pip install aether-browser    # Python
claude mcp add agent-browser -- npx -y aether-browser mcp    # any MCP client

Quickstart

Excerpt — the full document is on GitHub.

Alternatives to agent-browser

Maintain agent-browser? Add a badge to your README

Shows its health grade, and links readers to install steps for every client.

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