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opentabs

opentabs-dev · opentabs-dev/opentabs

This MCP server enables AI agents to call real web APIs through the user's browser session, offering over 100 plugins for various services like Slack, GitHub, and Stripe.

Browser automation clicks buttons. OpenTabs calls APIs.

985 stars98License: MITUpdated 15 days ago0 opens

Preview

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What you can do with it

  • Send Discord messages or add reactions using an AI agent.
  • Automate tasks in web applications like Jira or Notion via their APIs.
  • Integrate Stripe or AWS actions directly into agent workflows using existing login sessions.

Safety check

Caution

Usable, but read the notes first.

  • ●npm package runs a script automatically on install.package.json

Automated scan of the repo files. Always review code you run.

From the README

Docs  ·  Plugins  ·  Discord

Your AI calls real web APIs through your browser session — no screenshots, no DOM scraping.

AI sending a Discord message and adding reactions — real API calls, not browser automation

How It Works

  1. Install the CLI and load the Chrome extension
  2. Connect — the extension bridges your browser to a local server
  3. Use — your AI calls web APIs through your authenticated session

No API keys. No OAuth setup. If you're logged in, your AI can use it.

Works with any MCP client. Don't want MCP? Use CLI mode instead.

Quick Start

Requires Node.js 22+ and Chrome.

npm install -g @opentabs-dev/cli
opentabs start

Load the extension from ~/.opentabs/extension in chrome://extensions/ (Developer mode → Load unpacked).

opentabs plugin install

Full walkthrough: Quick Start guide

What You Get

  • 100+ plugins, ~2,000 tools. Slack, Discord, GitHub, Jira, Notion, Figma, AWS, Stripe, and a lot more. One command to install, works immediately.

  • Built-in browser tools. Screenshots, clicking, typing, network capture — works on any tab, no plugin needed.

  • Build your own. Scaffold a plugin in one command, publish to npm, anyone can install it. Or point your AI at any website — it discovers the APIs and builds the plugin for you. Plugin Development guide

    Install a plugin, use it immediately — no restart needed

Security

  • Everything starts off. No tool executes until you explicitly enable it.
  • Code review built in. Your AI reviews the plugin source before you enable it.
  • Version-aware. Permissions reset when a plugin updates.
  • Three permission levels. Off, Ask (confirmation dialog), or Auto — per-plugin or per-tool.
  • Runs locally. No cloud. Full audit log. Anonymous telemetry (opt-out).

Contributing

git clone https://github.com/opentabs-dev/opentabs.git
cd opentabs && npm install && npm run build
npm run dev       # tsc watch + MCP server + extension
npm run check     # build + type-check + lint + knip + test

Development Setup guide  ·  Discord

License

MIT — Not affiliated with or endorsed by any third-party service. Full disclaimer.

Docs  ·  Quick Start  ·  Plugin Development  ·  SDK Reference  ·  Browser Tools  ·  CLI Reference

Built with Claude Code, OpenCode, Ralph, and RetroUI.

View source on GitHub