Scalebrowser

Name: Scalebrowser
Author: blackdiamond-labs

by blackdiamond-labsversion 0.2.0i★ –iRuns on your computer

Registry namenet.scalebrowser/mcp

Install

Overview

Description from the maker (original English)

Isolated browsers with a persistent identity for AI agents, on your own Windows machine.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Download the maker’s .mcpb file

The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.

Run this in your terminal

claude mcp add scalebrowser -- npx -y @scalebrowser/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "scalebrowser": {
      "command": "npx",
      "args": [
        "-y",
        "@scalebrowser/mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "scalebrowser": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@scalebrowser/mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain scalebrowser.net (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32415 servers in this category
Published to the registry more recently than 56% of the other 32415 servers in this category
Basic checks equal to or better than 100% of the other 32415 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Scalebrowser safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 32 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js, MCPB on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Safe Fetch

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday

Install

Safe Fetch

by Sanoy24

MCP server for fetching URLs, safe against SSRF, DNS rebinding, and redirect-to-internal attacks.

Runs on your computerUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Scalebrowser MCP

Your agent got blocked, stopped at a login, or gave up on a captcha? Scalebrowser gives each AI agent its own isolated browser with a persistent identity, running on your own machine instead of a vendor's cloud. It stays signed in, handles the captcha, types like a human, and you can take over whenever you want.

This repository connects that browser to your agent over MCP: copy-paste configurations for every client the documentation covers, a small stdio bridge, and runnable SDK examples.

Before you start

Windows 10 or 11, 64-bit, with a real GPU. Scalebrowser is a desktop app that runs on your machine. There is no hosted mode.
A Scalebrowser account with an active plan. The way in is a 7-day trial with one browser. A payment method is required up front. Plans and prices

Free, no account needed: scalebrowser.net/check measures how your current browser looks from the outside, and scalebrowser.net/ai-agent-check measures what your automation tool does with it. Point your agent at the second one and see what a website can tell.

Try it in five minutes

Sign in at scalebrowser.net, open Download, and run the installer. It installs for the current user and asks for no administrator rights. SmartScreen warns on first run: choose More info, then Run anyway.
Start the app and press Sign in. The app then downloads and verifies the browser engine, which has to finish before any profile can start.
Copy your API token from Settings, General, Connect an agent.
Connect your agent. For Claude Code it is one command:

   claude mcp add --transport http scalebrowser http://127.0.0.1:8787/v1/mcp \

--header "Authorization: Bearer $SCALEBROWSER_TOKEN"

Ask it something:

Open news.ycombinator.com in a Scalebrowser profile, read the front page, and tell me the three stories with the most comments.

The agent takes a lease, which reserves a profile and starts its browser, opens the page, reads a text map of it and answers. Then ask it to release the profile.

Connect your client

Each file below is the configuration from the official documentation, ready to copy. Replace with your API token and with your Windows user name. Where each file goes, and the two spellings that fail without an error, is in clients/README.md.

Client	Configuration
Claude Code	claude-code.mcp.json, the command above, or the plugin
Claude desktop app	claude-desktop.json
Cursor	cursor.mcp.json
Codex	codex.config.toml
GitHub Copilot in VS Code	github-copilot.mcp.json
Antigravity	antigravity.mcp_config.json
Claude Code inside WSL	wsl-claude-code.json
Claude on the web, Grok, ChatGPT and other cloud chat services	No file: they reach your machine through remote access

What your agent gets

The agent works from a text map of the page and addresses elements by reference. It looks at the page once, then only at what moved. Over 75 steps on the same page, that spends 11x less on model tokens than Playwright MCP.

Signing in: credential_fill signs in with a login stored in the profile, and credential_new signs up with a password Scalebrowser draws and stores. The agent never sees the value.
Confirmation codes: read_inbox reads the codes sent to the address bound to the profile, and inbox_open_link opens a link from a message.
Challenges: press_and_hold, click and four measuring tools work through verification challenges with the same human input. The measured status per challenge type says what passes and what does not.
Proof of the work: record and video turn a run into a film, and every tool call becomes a step in the run's trail.

The full list is in the tool reference. What an agent may do is decided by the app, not by the client.

The bridge

bridge/scalebrowser-mcp.mjs is a stdio MCP server with no dependencies. With the Scalebrowser app running on the same Windows machine, it relays every message to the app's own MCP endpoint, using the address and token the app keeps in %LOCALAPPDATA%\Scalebrowser. Without the app, it answers with the tool list and install instructions. That second mode is what MCP directories see when they build this repository.

Clients that speak HTTP do not need it: use the configurations above. For a client that only starts servers over stdio, run it from npm:

npx -y @scalebrowser/mcp

or from a clone of this repository:

node bridge/scalebrowser-mcp.mjs

It needs Node 22 or newer. --data-dir points it at another data directory, and SCALEBROWSER_TOKEN overrides the token file.

As a Claude desktop extension

Each release carries the bridge as an MCP Bundle, scalebrowser- .mcpb. Download it on the Windows machine the app runs on and open it with the Claude desktop app, or choose Settings, Extensions, Install Extension there. It needs no configuration: it finds the app and its token by itself.

The bridge is also listed in the MCP Registry as net.scalebrowser/mcp.

As a Claude Code plugin

This repository is also a Claude Code plugin. In Claude Code on the Windows machine the app runs on:

/plugin marketplace add blackdiamond-labs/scalebrowser-mcp

/plugin install scalebrowser@scalebrowser

The plugin starts the bridge, so it needs Node 22 or newer and no token in any file. It also adds a skill that teaches the agent the lease, read, act, release loop, to look before it repeats a failed action, and to sign in with stored logins instead of asking for a password.

SDK examples

The same small task in both SDKs: open Hacker News in a profile and print the three top stories. Run them on the Windows machine the app runs on, with your token in SCALEBROWSER_TOKEN.

cd examples/node

npm ci node top-stories.mjs

cd examples/python

pip install --require-hashes -r requirements.txt python top_stories.py

Both use the published SDKs, @scalebrowser/sdk on npm and scalebrowser on PyPI. The SDK documentation covers the full surface.

Privacy Policy

The bridge collects nothing, stores nothing and sends nothing to us or to anyone else.

What it reads: the address and API token the Scalebrowser app keeps in its data directory on your machine, %LOCALAPPDATA%\Scalebrowser unless you pass --data-dir.
Where messages go: only to the Scalebrowser app on the same machine. It refuses any address that is not this machine's own loopback address, so the token and your agent's messages never leave the computer through the bridge.
What it keeps: nothing. It holds the session with the app in memory and ends it when your client disconnects. It writes no files and no logs besides the status lines it prints to standard error.
Third parties: none. The bridge has no dependencies, no telemetry and no network access of its own beyond the loopback connection to the app.

The Scalebrowser app itself, the account and the website are covered by the Scalebrowser privacy policy. Questions about privacy go to support@scalebrowser.net.

Questions and support

Write to support@scalebrowser.net. Issues are switched off in this repository; CONTRIBUTING.md says why.

License

Everything in this repository is MIT-licensed. The Scalebrowser app and its browser engine are a separate, licensed product.

Scalebrowser

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Safe Fetch

README from the maker

Scalebrowser MCP

Try it in five minutes

Connect your client

What your agent gets

The bridge

As a Claude desktop extension

As a Claude Code plugin

SDK examples

Privacy Policy

Questions and support

Links

License