# MCP Evals (mcp-evals) - AgentBreakWatch Reference

> TL;DR Verdict: MCP Evals (`mcp-evals`) is currently at v2.0.1 on NPM (published 2025-06-28), with a 90-day Stability Score of 86/100 (B+) and MEDIUM schema drift risk across 0 releases in the last 90 days. Built on MCP SDK (^1.11.0); recent release v2.0.1 (up from v2.0.0) updates MCP DevTool / Inspector tool schemas and transport handling (0 releases in last 90d). Pin exact version v2.0.1 in .mcp.json to avoid silent parameter drift.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/mcp-evals
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `mcp-evals`
- Registry: NPM (https://www.npmjs.com/package/mcp-evals)
- GitHub Repository: https://github.com/mclenhard/mcp-evals
- Vendor: mclenhard
- Latest Live Version: v2.0.1
- Published Date: 2025-06-28T16:02:02.022Z
- 90-Day Release Count: 0
- Direct Dependencies: 20
- License: MIT
- Stability Score: 86/100 (Grade B+)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y mcp-evals@2.0.1`
- Watched Symbols / MCP Tools: mcp-eval, tools/list, tools/call
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
Built on MCP SDK (^1.11.0); recent release v2.0.1 (up from v2.0.0) updates MCP DevTool / Inspector tool schemas and transport handling (0 releases in last 90d). Pin exact version v2.0.1 in .mcp.json to avoid silent parameter drift.

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

## Migration Diff: After (Verified v2.0.1 Pattern)
```
"mcp-evals": {
  "command": "npx",
  "args": ["-y", "mcp-evals@2.0.1"]
}
```

## Recent Verified Releases
- v2.0.1 (published 2025-06-28) [LATEST]
- v2.0.0 (published 2025-06-23)
- v1.0.18 (published 2025-04-30)
- v1.0.17 (published 2025-04-24)
- v1.0.16 (published 2025-04-24)
- v1.0.15 (published 2025-04-24)