Stagehand

Stagehand abstracts away the brittleness of traditional browser automation (CSS/XPath selectors) by using LLMs to interpret natural language actions — stagehand.act("click the Submit button") figures out the right element without requiring a selector. This makes agent-driven web automation dramatically more robust to page changes. act() for actions, extract() for structured data extraction, observe() for listing interactable elements. Works locally or with Browserbase cloud sessions. Open-source (TypeScript/Node.js). Confidence is docs-derived.

TypeScript SDK: npm install @browserbasehq/stagehand. const stagehand = new Stagehand({env: "LOCAL"|"BROWSERBASE", apiKey: ..., projectId: ...}). await stagehand.init(). await stagehand.act("click on the login button"). const data = await stagehand.extract({instruction: "extract product prices", schema: z.array(z.object({name: z.string(), price: z.number()}))}). const elements = await stagehand.observe("find all navigation links"). Close: await stagehand.close(). Playwright page object also accessible for direct Playwright commands.

Local mode: no API key required; uses local Chrome. Browserbase mode: BROWSERBASE_API_KEY and BROWSERBASE_PROJECT_ID env variables. LLM keys: OPENAI_API_KEY or ANTHROPIC_API_KEY required for natural language processing. HTTPS enforced for Browserbase. Keys managed via env variables; no OAuth2.

act() uses LLM retries internally for action resolution — reduces brittleness but adds latency (1–3s per action vs. <100ms for direct Playwright). LLM API failures surface as stagehand errors. extract() validates output against provided Zod schema. Browser crashes handled by Browserbase session infrastructure. Local Chrome: standard Playwright reliability. Stagehand GitHub shows active maintenance.

docs.stagehand.dev covers quickstart (local + Browserbase), act/extract/observe API, model configuration, and advanced patterns. Getting started: npm install, set LLM key, first act() in under 10 minutes. Open-source MIT license (GitHub: browserbase/stagehand). Active community via Browserbase Discord. Regular releases.