Tabrein · MCP browser extension

Give your AI
a real browser.

Tabrein connects Claude, Cursor, VS Code and any MCP client to Chrome. Your agents click, type, fill forms and upload files in the browser you are already signed in to — several at once, each in its own tab.

Start 7-day free trial Coming soonChrome Web Store
For Google ChromeComing soonMicrosoft EdgeBraveArcOpera

From $12 a month · 7-day free trial · Cancel any time

You, in Claude Code

Register us on the supplier portal and attach this month’s invoice.

Works with
  • Claude Code
  • Claude Desktop
  • Cursor
  • VS Code
  • Windsurf
  • Zed
  • + any MCP client

Why Tabrein

Built for agents
that do real work.

Your browser, not a headless bot

Agents use the Chrome you already have: your sign-ins, cookies and extensions. No new logins, no copied passwords, and sites see an ordinary browser.

Many agents, one browser

Run Claude Code in one project and Cursor in another. Each gets its own tab in a coloured group; free tabs are reused, new ones opened only when needed.

Fast, and light on tokens

After each action the agent gets a short report of what changed, not the whole page again. Waits follow real page events. Fewer tokens, fewer retries, faster runs.

~125 msper click, in front and background tabs

Features

26 browser tools,
ready for your AI.

Everything an agent needs to finish a task on the web, from the first navigation to the confirmation page.

Whole forms in one call

Text fields, selects, checkboxes and radios filled together, then checked.

File uploads

Attach files from your computer to any upload field, including hidden ones.

Real input

Clicks, typing, hover, drag and keys arrive as trusted browser input, so sites respond as they would to you.

Find on page

Locate text or controls on long pages without reading the whole page into the model.

Tabs and history

Open, switch and close tabs; go back and forward; reload.

Snapshots and screenshots

An accessibility snapshot with stable element references, or a picture when one is needed.

Dialogs and waits

Alerts and confirms are answered; navigation and loading are awaited, not guessed.

Console and scripts

Read console logs and run JavaScript in the page when you need a precise answer.

Always in view

See every agent
at a glance.

The Tabrein popup shows which agents are connected, what each one is doing and which tab it works in. One click shows an agent’s tab; one more stops them all.

  • Live status for every agent
  • Last action and errors, in plain words
  • Connect or release any tab yourself

Setup

Running in two minutes.

  1. 1

    Add the extension to Chrome

    Install Tabrein from the Chrome Web Store and pin it to the toolbar.

    Coming soonChrome Web Store
  2. 2

    Add Tabrein to your AI app

    One line for Claude Code, a few for the rest. Node.js 18 or later is required.

    Run in your terminal

    claude mcp add tabrein -- npx -y tabrein@latest

    Settings → Developer → Edit config

    {
  "mcpServers": {
    "tabrein": {
      "command": "npx",
      "args": [
        "-y",
        "tabrein@latest"
      ]
    }
  }
}

    ~/.cursor/mcp.json

    {
  "mcpServers": {
    "tabrein": {
      "command": "npx",
      "args": [
        "-y",
        "tabrein@latest"
      ]
    }
  }
}

    .vscode/mcp.json

    {
  "servers": {
    "tabrein": {
      "command": "npx",
      "args": [
        "-y",
        "tabrein@latest"
      ]
    }
  }
}
  3. 3

    Activate and connect a tab

    Paste the licence key from your welcome email into the popup, open the page you want automated and press Connect. Then ask your AI to do the task.

Security & privacy

Your pages stay
on your computer.

Local by design

The Tabrein server listens only on your own computer (127.0.0.1) and accepts connections only from the Tabrein extension.

Nothing passes through us

Pages, screenshots and what agents type go only to the AI app you chose. We receive a licence check and nothing else.

You stay in control

Agents work only in tabs you connect or that they open for themselves. Release a tab or stop every agent from the popup at any time.

You decide what agents may do.

Each sensitive capability is Allow, Ask or Block. Blocked tools disappear from your AI’s tool list the moment you change the setting. On Ask, Tabrein opens its own window with what the agent wants to do; the agent cannot click it.

When an agent needs something you blocked, it asks you with a reason, and you answer once, for that agent, or always. You can also keep agents away from whole sites, such as your bank.

Why the extension asks for each permission

debugger
Sends trusted clicks and keys, waits for page loads and answers dialogs, only in tabs you connected.
tabs, tabGroups
Opens, lists and groups the tabs your agents work in.
scripting
Reads the page structure to build the snapshot the AI sees.
All sites
Lets agents work on whichever site you send them to.
storage, alarms
Remembers settings and keeps the local connection alive.

Pricing

Simple monthly plans.

Every plan starts with a 7-day free trial. Cancel any time from your billing page.

Most popular

Pro

For one person and all of their AI tools.

$12/ month

Billed monthly

Start 7-day free trial
  • Unlimited agents, tabs and actions
  • All tools: forms, uploads, dialogs, find
  • Permission controls and blocked sites
  • Works with every MCP client
  • Up to 3 computers
  • All updates included
  • Email support

Team

For agencies and teams that automate together.

$39/ month

Billed monthly

Start 7-day free trial
  • Everything in Pro
  • 5 seats included
  • One invoice for the whole team
  • Add or reassign seats any time
  • Priority support, 1 business day

Business

More seats, invoicing or a custom agreement.

Let’s talk

Annual agreement

Contact us
  • Volume pricing
  • Purchase orders and bank transfer
  • Security review and DPA
  • Onboarding for your team

Prices in US dollars. Sales tax or VAT is added where required. Tabrein does not include an AI model: you use the AI app and subscription you already have. Cancellation and refunds · Terms

Questions

Good to know.

Something else? Write to info@novpix.com. We answer within one business day.

Which AI do I need?

Any app that supports the Model Context Protocol (MCP): Claude Code, Claude Desktop, Cursor, VS Code, Windsurf and others. Tabrein does not include a model; it gives the AI you already use a browser.

Can we see the pages my agents visit?

No. Page content travels from your browser to the Tabrein server on your own computer and on to the AI app you connected. It never passes through our servers. The only thing Tabrein sends us is a licence check. See the privacy policy.

Can several agents work at the same time?

Yes. Each AI session gets its own tab in a coloured, labelled tab group. A free connected tab is reused; otherwise Tabrein opens a new one. Agents cannot take each other’s tabs.

Does it work in background tabs?

Yes. Agents keep working while you use other tabs or windows; clicks in a background tab are as fast as in the front one.

Which browsers are supported?

Google Chrome 116 or later on macOS, Windows and Linux. Official support for Microsoft Edge, Brave, Arc and Opera is coming soon; until then they usually work when you install Tabrein from the Chrome Web Store.

Can I keep agents away from passwords and files?

Yes. Typing into password fields is blocked by default, and file uploads and scripts ask first. Change any of them in the Tabrein popup, and add sites agents must never touch.

Will it solve CAPTCHAs?

No. Tabrein does not bypass CAPTCHAs, logins or other access controls. When a site asks for one, you complete it and the agent continues.

What happens when the trial ends?

If you subscribe, nothing changes. If you don’t, the tools stop working until you do. You can cancel during the 7-day trial and you will not be charged.

How do I cancel?

From your billing page at any time, or by email to info@novpix.com. You keep access until the end of the period you paid for. New subscriptions can be refunded within 14 days; see the refund policy.

Let your AI
finish the job.

Try every feature free for 7 days. No commitment.

See plans Coming soonChrome Web Store
TabreinTerms of servicePrivacy policyCancellation & refundsinfo@novpix.com