OpenTabs

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Browser automation clicks buttons. OpenTabs calls APIs.

Playwright, Puppeteer, and Stagehand simulate a human — click, type, read the screen. OpenTabs skips all that. It calls the same internal APIs the web app's own frontend calls, through your browser, using your existing session. Exposed as MCP tools.

No screenshots. No DOM scraping. No pixel-guessing.

Quick Start

You need Node.js 22+ and Chrome.

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

First run prints MCP config blocks you can paste into Claude Code, Cursor, or Windsurf. Load the extension from ~/.opentabs/extension via chrome://extensions/ (Developer mode → Load unpacked).

opentabs plugin install <plugin-name>

Five minutes, start to finish. See the Quick Start guide.

100+ Plugins, ~2,000 Tools

discord_send_message hits Discord's real backend — fast, deterministic, cheap on tokens.

Slack, Discord, GitHub, Jira, Notion, Figma, AWS, Stripe, Robinhood, Panda Express, Airbnb, and a lot more. Plus built-in browser tools (screenshots, clicking, typing, network capture) that work on any tab without a plugin.

Build a Plugin

Point your AI at any website. It analyzes the page, discovers the APIs, scaffolds the code, and registers it.

opentabs plugin create my-app --domain .example.com
cd my-app && npm install && npm run build

Publish to npm and anyone can opentabs plugin install it. See the Plugin Development guide.

Security

• Everything starts off. Every plugin is disabled by default — not "ask," actually off.

• AI-assisted code review. Your AI reviews the adapter source before you enable it.

• Version-aware. When a plugin updates, permissions reset. New code, new review.

• Three permission levels. Off, Ask (confirmation dialog), or Auto. Per-plugin or per-tool.

• Runs locally. No cloud. Everything in ~/.opentabs/. Full audit log. Anonymous telemetry (opt-out).

How This Was Built

Built entirely by AI agents — zero hand-written application code. Hundreds of PRDs executed by Claude Code workers via Ralph. Every PRD is open-sourced: opentabs-dev/opentabs-prds.

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

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

See the Development Setup guide.

License

MIT — Not affiliated with or endorsed by any third-party service. See the full disclaimer.