# Browserbase Stagehand MCP Server (@browserbasehq/mcp-server-browserbase) - AgentBreakWatch Reference

> TL;DR Verdict: Browserbase Stagehand MCP Server (`@browserbasehq/mcp-server-browserbase`) is currently at v2.4.3 on NPM (published 2026-01-23), with a 90-day Stability Score of 78/100 (B) and HIGH schema drift risk across 0 releases in the last 90 days. v2.x consolidates raw Puppeteer tools into Stagehand-powered browserbase_stagehand_act, observe, and extract tools.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/browserbase-mcp
- Category Hub: https://agentbreakwatch.vercel.app/c/browser-automation (Browser Automation, Playwright & DevTools MCP Servers)
- Package Name: `@browserbasehq/mcp-server-browserbase`
- Registry: NPM (https://www.npmjs.com/package/@browserbasehq/mcp-server-browserbase)
- GitHub Repository: https://github.com/browserbase/mcp-server-browserbase
- Vendor: Browserbase
- Latest Live Version: v2.4.3
- Published Date: 2026-01-23T23:13:33.015Z
- 90-Day Release Count: 0
- Direct Dependencies: 8
- License: Apache-2.0
- Stability Score: 78/100 (Grade B)
- Schema Drift Risk: HIGH
- Recommended Exact Pin Command: `npx -y @browserbasehq/mcp-server-browserbase@2.4.3`
- Watched Symbols / MCP Tools: browserbase_session_create, browserbase_stagehand_navigate, browserbase_stagehand_act, browserbase_stagehand_extract
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
v2.x consolidates raw Puppeteer tools into Stagehand-powered browserbase_stagehand_act, observe, and extract tools.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
{ "name": "browserbase_click", "arguments": { "selector": "#login" } }
```

## Migration Diff: After (Verified v2.4.3 Pattern)
```
{ "name": "browserbase_stagehand_act", "arguments": { "action": "Click the login button" } }
```

## Recent Verified Releases
- v2.4.3 (published 2026-01-23) [LATEST]
- v2.4.1 (published 2025-11-17)
- v2.4.0 (published 2025-11-11)
- v2.3.0 (published 2025-11-10)
- v2.2.0 (published 2025-10-16)
- v2.1.3 (published 2025-10-13)