Browser infrastructure that works everywhere, every time.

import { Stagehand } from "@browserbasehq/stagehand";

const stagehand = new Stagehand({
  env: "BROWSERBASE",
  model: {
    modelName: "google/gemini-3-flash-preview",
    apiKey: process.env.MODEL_API_KEY,
  }
});
await stagehand.init();

const page = stagehand.context.pages()[0];
await page.goto("https://news.ycombinator.com");

// Let AI click
await stagehand.act("click on the comments link for the top story");

// Extract structured data
const data = await stagehand.extract("extract the title and points of the top story");
console.log(data);

await stagehand.close();

import asyncio

from stagehand import AsyncStagehand

async def main() -> None:
    # Create client using environment variables:
    # BROWSERBASE_API_KEY, BROWSERBASE_PROJECT_ID, MODEL_API_KEY
    client = AsyncStagehand()

    # Start a new browser session (returns a session helper bound to a session_id)
    session = await client.sessions.create(model_name="openai/gpt-5-nano")

    try:
      await session.navigate(
          url="https://news.ycombinator.com",
          options={"wait_until": "domcontentloaded"},
      )
  
      stream = await session.execute(
          agent_config={"model": model_name},
          execute_options={
              "instruction": "Go to Hacker News and return the titles of the first 3 articles.",
              "max_steps": 5,
          },
          stream_response=True,
          x_stream_response="true",
      )
  
      result = await _stream_to_result(stream, "execute")
      message = result.get("message") if isinstance(result, dict) else result
      print("Agent message:", message)
      print("\nFull result:")
      print(json.dumps(result, indent=2, default=str))
  finally:
      await session.end()

if __name__ == "__main__":
    asyncio.run(main())