Stagehand
What is Stagehand?
Stagehand is an open source browser automation framework for developers that combines deterministic primitives with AI-guided flexibility. Its act(), extract(), observe(), and agent() flows handle clicking, filling, navigation, page reading, and multi-step workflows, while supporting OpenAI, Anthropic, and Google Gemini through the Vercel AI SDK. It runs locally with any Chromium browser, can use Browserbase for production deployment, and is fully open source under the MIT license.
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At a glance
- Stagehand is best for developers who need reliable browser automation with both precision and agentic flexibility.
What does Stagehand do?
Stagehand handles browser automation by combining deterministic primitives with AI-guided flexibility. Its act(), extract(), and observe() flows let developers click, fill, navigate, read page content, and watch for changes using natural-language instructions, while agent() can take over multi-step workflows when a task needs more autonomy. The result is browser automation that stays readable and resilient instead of turning into a black box. It works locally out of the box with any Chromium browser, and Browserbase is optional for production deployment. The stack supports OpenAI, Anthropic, and Google Gemini through the Vercel AI SDK, and Browserbase users can route models through one API key. The project is fully open source under the MIT license, and the site describes it as the most popular AI browser automation framework and the only open source browser AI framework built specifically for browser agents.
Why use Stagehand?
- It combines precise primitives with agentic workflows, so teams can keep critical paths deterministic and still automate complex journeys.
- It runs locally with any Chromium browser, which lowers setup friction before moving production workloads to Browserbase.
- Its open source MIT license lets teams inspect, contribute to, and adapt the framework instead of treating it as a closed service.
- Support for major model providers through the Vercel AI SDK reduces lock-in to a single LLM vendor.
- Browserbase users can manage supported models through one API key, simplifying credential handling across providers.
Who is Stagehand for?
- Frontend engineers who need browser flows that survive page changes without constant rewrites.
- AI developers who want browser agents with deterministic control for critical steps.
- Automation engineers who need to mix scripted actions with autonomous multi-step workflows.
- Product teams building web data extraction or checkout automation on Chromium browsers.
What are Stagehand's key features?
act()
Runs browser actions through one API key and four primitives, letting agents click, type, and navigate without brittle scripting.
extract()
Pulls structured data from pages into clean outputs, helping teams turn browser visits into usable records with one API key.
observe()
Watches page state and changes so agents can decide what to do next, reducing missed UI updates in browser workflows.
agent()
Provides a browser-agent runtime for building autonomous flows with OpenAI, Anthropic, Google Gemini, or Vercel AI SDK.
Self-healing
Adapts to UI changes during automation, which lowers breakage when page layouts shift and keeps browser agents running longer.
Open source
Ships as the only open source browser AI framework built specifically for browser agents, giving teams inspectable code and easier customization.
What does Stagehand integrate with?
- OpenAI
- Anthropic
- Google Gemini
- Vercel AI SDK
What are Stagehand's use cases?
Frontend flows that survive changes
A frontend engineer uses Stagehand to keep critical browser flows working as pages change, combining act() for deterministic clicks with Self-healing to recover from shifted selectors. That means fewer brittle rewrites when checkout, signup, or navigation UI changes.
Deterministic browser agents for AI
An AI developer uses Stagehand to build browser agents that can take precise actions with act() and then verify page state with observe(). This gives them controlled execution for high-stakes steps like form submission, approvals, or handoffs.
Hybrid automation for web workflows
An automation engineer uses Stagehand to mix scripted steps with autonomous browsing through agent(), then pulls structured results with extract(). That makes it practical to run multi-step workflows that need both reliability and flexibility.
Chromium extraction for product teams
A product team uses Stagehand to automate web data extraction or checkout flows on Chromium browsers, using extract() to capture the fields they need and Open source to adapt the workflow to their stack. The result is cleaner data pipelines and fewer manual browser tasks.
How does Stagehand work?
- Connect your first browser workflow in Chromium and point Stagehand at the page you want to automate. Start with act() when you need a deterministic click, type, or navigation step.
- Add extract() to pull structured data from the page after the interaction. Use it to capture fields, table rows, or checkout details without writing brittle parsing logic.
- Switch to observe() when you need the agent to inspect page state before acting. This helps you confirm what changed and decide the next step with less guesswork.
- Use agent() for multi-step browsing when scripted actions are not enough. Let it handle longer flows, then combine it with act() for the critical moments that must stay precise.
- Rely on Self-healing to keep workflows running when the UI shifts. Reuse the same Open source setup across your team and connect it to OpenAI, Anthropic, Google Gemini, or Vercel AI SDK.
Frequently asked questions
What is Stagehand?
Stagehand is an open source browser automation framework for developers that combines deterministic primitives with AI-guided flexibility. Its act(), extract(), observe(), and agent() flows handle clicking, filling, navigation, page reading, and multi-step workflows, while supporting OpenAI, Anthropic, and Google Gemini through the Vercel AI SDK. It runs locally with any Chromium browser and can use Browserbase for production deployment.
What is Stagehand used for? Who is it for?
Stagehand is used for act(), extract(), and observe(). It's built for Frontend engineers, AI developers, and Automation engineers.
Does Stagehand have an API and what does it integrate with?
Stagehand doesn't publish a public API. It integrates with OpenAI, Anthropic, Google Gemini, Vercel AI SDK.
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