unbrowser by Unchained MCP Server

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local only

unbrowser by Unchained runs on your own machine — the client starts it, so there is no endpoint to ping. 129 installs a week from pypi. Last commit 22 Aug 2026.

Chrome-free MCP web access for agents with low-token page maps and browser escalation hints.

Installs per day peak 199 · avg 42 · -70% w/w

a month agotoday

129

Installs / week

pypi · pyunbrowser

Stars

0 open issues

22 Aug 2026

Last commit

from GitHub

Apache-2.0

License

Rust

What the code does

We read the source, 3 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command train/collect.py:146, train/eval_tool_likelihoods.py:27, python/unbrowser/__init__.py:149 и ещё 1

    p = subprocess.Popen(

Executes code built at runtime python/unbrowser/__init__.py:376

    def eval(self, code: str) -> Any:

Page executes code built at runtime chrome-tax-calculator.html:708

  document.getElementById('presets').innerHTML = PRESETS.map((p,i) =>

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add unbrowser -- uvx pyunbrowser

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "unbrowser": {
      "command": "uvx",
      "args": [
        "pyunbrowser"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.unbrowser]
command = "uvx"
args = ["pyunbrowser"]

.cursor/mcp.json

{
  "mcpServers": {
    "unbrowser": {
      "command": "uvx",
      "args": [
        "pyunbrowser"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "unbrowser": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "pyunbrowser"
      ]
    }
  }
}

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unbrowser by Unchained — questions

Answers built from our own checks of this server.

Why is there no uptime for unbrowser by Unchained?

unbrowser by Unchained runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package pyunbrowser was installed 129 times last week.

How do I connect unbrowser by Unchained?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls pyunbrowser straight from pypi; nothing to host, nothing to sign up for.

How many people use unbrowser by Unchained?

The pypi package pyunbrowser was installed 129 times in the last week. Week over week that is -70%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is unbrowser by Unchained open source?

Yes — it is published under the Apache-2.0 licence, written in Rust and 17 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.