# Hevy MCP (hevy-mcp) - AgentBreakWatch Reference

> TL;DR Verdict: Hevy MCP (`hevy-mcp`) is currently at v6.2.1 on NPM (published 2026-10-16), with a 90-day Stability Score of 78/100 (B) and MEDIUM schema drift risk across 38 releases in the last 90 days. recent release v6.2.1 (up from v6.2.0) updates Developer Tools MCP tool schemas and transport handling (38 releases in last 90d). Pin exact version v6.2.1 in .mcp.json to avoid silent parameter drift.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/hevy-mcp
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `hevy-mcp`
- Registry: NPM (https://www.npmjs.com/package/hevy-mcp)
- GitHub Repository: https://github.com/chrisdoc/hevy-mcp
- Vendor: chrisdoc
- Latest Live Version: v6.2.1
- Published Date: 2026-10-16T17:33:55.861Z
- 90-Day Release Count: 38
- Direct Dependencies: 14
- License: MIT
- Stability Score: 78/100 (Grade B)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y hevy-mcp@6.2.1`
- Watched Symbols / MCP Tools: hevy-mcp, tools/list, tools/call
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
recent release v6.2.1 (up from v6.2.0) updates Developer Tools MCP tool schemas and transport handling (38 releases in last 90d). Pin exact version v6.2.1 in .mcp.json to avoid silent parameter drift.

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

## Migration Diff: After (Verified v6.2.1 Pattern)
```
"hevy-mcp": {
  "command": "npx",
  "args": ["-y", "hevy-mcp@6.2.1"]
}
```

## Recent Verified Releases
- v6.2.1 (published 2026-10-16) [LATEST]
- v6.2.0 (published 2026-10-16)
- v6.1.22 (published 2026-10-11)
- v6.1.21 (published 2026-10-07)
- v6.1.20 (published 2026-10-04)
- v6.1.19 (published 2026-10-03)