Browserbase

Browserbase is browser agent infrastructure that gives your AI agents access to the whole web. It provides fleets of real headless browsers via a simple API, plus Search and Fetch APIs that turn the web into token-efficient context for LLMs. From login to task completion, Browserbase powers agents that reliably operate on the web — handling auth walls, CAPTCHAs, forms, and dynamic content.

Key Features

• Browser-as-a-Service: Spin up real browser sessions programmatically; agents navigate, click, fill forms, and complete actions like a human.
• Search API: Web search built for agents — find relevant websites from a single query.
• Fetch API: Convert any URL into clean HTML, JSON, or markdown for token-efficient context (85% of the web APIs can't reach).
• Agent Identity: Verified agents + auto CAPTCHA solving and stealth research team for anti-bot resistance.
• Stagehand SDK: AI-powered browser automation with natural-language act/extract/observe primitives, Playwright-level control.
• Runtime (Browserbase Functions): Deploy and run agents on Browserbase for faster, more secure execution.
• Model Gateway: One API key for major models with unified billing via Stagehand.
• Observability: Built-in session recording, replays, and monitoring.

Use Cases

Who Should Use This Tool?

• Web Agent Builders: Agents that must log in, navigate, and act on websites APIs can't reach.
• Scraping & Research Teams: Large-scale data collection with rotating proxies and clean formatting.
• Product QA Teams: Continuous agents that click through your product and alert on broken flows.

Problems It Solves

1. Login walls & CAPTCHAs: Agent Identity handles verification so agents aren't blocked.
2. Token bloat: Fetch API returns clean markdown/HTML, cutting token usage dramatically.
3. Browser infrastructure: No need to run your own browser fleet; concurrency scales on demand.

Pricing

Browser time billed per minute; pay-as-you-go overages with no caps.

Advantages & Unique Selling Points

Compared to Competitors:

1. Full browser control: Real Chrome instances you connect with Puppeteer, Playwright, or Selenium.
2. Agent-first APIs: Search and Fetch endpoints designed for LLM context, not human browsing.
3. Identity & anti-bot: Verified agents and stealth research that open-source alternatives lack.

What Makes It Stand Out:

• Stagehand: the AI SDK for browser agents with self-healing scripts.
• Integrates with CrewAI, LangChain, Mastra and other agent frameworks.
• Production-scale session recording and replay for debugging.

Getting Started

Quick Start Guide

1. Get an API key: Create a free account at browserbase.com.
2. Create a browser session: Use the API or SDK to spin up an instance.
3. Connect your model: Point an agent at the session to interpret pages and drive interactions.
4. Or use Stagehand: Write natural-language automation with act/extract/observe.

Integration

Integrates with:

• Playwright, Puppeteer, Selenium
• CrewAI, LangChain, Mastra
• Stagehand and any HTTP-capable language

Frequently Asked Questions

Does it work with Playwright and Puppeteer?

Yes — full support for TypeScript/JavaScript, Python, Java, and .NET via the Chrome DevTools Protocol.

Can agents access login-protected sites?

Yes — Agent Identity handles logins, and persistent sessions maintain cookies across runs.

How do you reduce token usage?

The Fetch API converts pages to clean markdown/HTML, and optimized formats cut costs by up to 80%.

Alternatives

If Browserbase isn't the right fit, consider these alternatives:

• Steel: Open-source browser API you can self-host with Docker.
• Kitesurf: Cloudflare's lighter browser built for agents on Workers.
• Cloudflare Computer: For persistent filesystem and code execution, not just browsing.

Tips & Best Practices

1. Use keep-alive sessions: Reuse sessions instead of creating new ones for short-lived workflows.
2. Route through proxies deliberately: Fetch with proxies costs more — use them only when needed.
3. Leverage Stagehand for dynamic pages: AI-powered selectors self-heal when UIs change.

Conclusion

Browserbase turns the web into a reliable, programmable surface for AI agents — real browsers, agent-first Search/Fetch APIs, and identity handling that opens login-gated sites. If your agents need to act on the web, not just read it, Browserbase is the production-grade choice.