# Metamask Device MCP (@metamask/device-mcp) - AgentBreakWatch Reference

> TL;DR Verdict: Metamask Device MCP (`@metamask/device-mcp`) is currently at v0.5.0 on NPM (published 2026-10-19), with a 90-day Stability Score of 73/100 (C+) and HIGH schema drift risk across 7 releases in the last 90 days. Built on MCP SDK (^1.12.1); recent release v0.5.0 (up from v0.4.2) updates Browser Automation MCP tool schemas and transport handling (7 releases in last 90d). Pin exact version v0.5.0 in .mcp.json to avoid silent parameter drift.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/metamask-device-mcp
- Category Hub: https://agentbreakwatch.vercel.app/c/browser-automation (Browser Automation, Playwright & DevTools MCP Servers)
- Package Name: `@metamask/device-mcp`
- Registry: NPM (https://www.npmjs.com/package/@metamask/device-mcp)
- GitHub Repository: https://github.com/MetaMask/device-mcp
- Vendor: Metamask
- Latest Live Version: v0.5.0
- Published Date: 2026-10-19T17:02:00.353Z
- 90-Day Release Count: 7
- Direct Dependencies: 2
- License: (MIT OR Apache-2.0)
- Stability Score: 73/100 (Grade C+)
- Schema Drift Risk: HIGH
- Recommended Exact Pin Command: `npx -y @metamask/device-mcp@0.5.0`
- Watched Symbols / MCP Tools: tools/list, tools/call, device-mcp
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
Built on MCP SDK (^1.12.1); recent release v0.5.0 (up from v0.4.2) updates Browser Automation MCP tool schemas and transport handling (7 releases in last 90d). Pin exact version v0.5.0 in .mcp.json to avoid silent parameter drift.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
"metamask-device-mcp": {
  "command": "npx",
  "args": ["-y", "@metamask/device-mcp@latest"]
}
```

## Migration Diff: After (Verified v0.5.0 Pattern)
```
"metamask-device-mcp": {
  "command": "npx",
  "args": ["-y", "@metamask/device-mcp@0.5.0"]
}
```

## Recent Verified Releases
- v0.5.0 (published 2026-10-19) [LATEST]
- v0.4.2 (published 2026-09-17)
- v0.4.1 (published 2026-09-15)
- v0.4.0 (published 2026-09-11)
- v0.3.3 (published 2026-08-10)
- v0.3.2 (published 2026-07-28)