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hydro13/tandem-browser

An Electron-based, local-first browser that lets AI agents and a human share the same real logged-in browser session via MCP or HTTP.

Open-source alternative to:BrowserbasePerplexity CometOpenAI ChatGPT Atlas

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Key features

  • 01Runs inside the user's real logged-in browser session, sharing tabs, cookies, and extensions
  • 02Exposes 257 MCP tools and a 300+ endpoint HTTP API for agents
  • 03Gives agents page structure through accessibility snapshots and DOM rather than screenshots
  • 04Supports remote agent access over Tailscale and multiple agents at once
  • 05Includes a password vault, workspaces, bookmarks, and Chrome extension loading
  • 06Hands control back to the human for captchas and risky actions

Use cases

  • Automating tasks in web apps that offer no public API, using your own logged-in session
  • Having an AI agent research or summarize pages in tabs while you keep browsing
  • Letting a local or remote AI model operate a browser you can monitor and take over
  • Injecting custom UI changes or userscripts into sites you use every day

Topics

FAQ

What is tandem-browser?
An Electron-based, local-first browser that lets AI agents and a human share the same real logged-in browser session via MCP or HTTP.
Is tandem-browser free to use? What license does it have?
tandem-browser is open source under the MIT license. Check the license terms before using it in commercial products.
Is tandem-browser still maintained?
Actively maintained. The last commit to tandem-browser was on Oct 18, 2026.
What can I use tandem-browser for?
Automating tasks in web apps that offer no public API, using your own logged-in session Having an AI agent research or summarize pages in tabs while you keep browsing Letting a local or remote AI model operate a browser you can monitor and take over Injecting custom UI changes or userscripts into sites you use every day
Where can I get tandem-browser?
The source code and installation instructions are on GitHub: https://github.com/hydro13/tandem-browser

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