# Mastra MCP Docs Server (@mastra/mcp-docs-server) - AgentBreakWatch Reference

> TL;DR Verdict: Mastra MCP Docs Server (`@mastra/mcp-docs-server`) is currently at v1.3.9 on NPM (published 2026-10-21), with a 90-day Stability Score of 78/100 (B) and MEDIUM schema drift risk across 57 releases in the last 90 days. recent release v1.3.9 (up from v0.0.0-doctor-retest-20261023184401) updates Developer Tools MCP tool schemas and transport handling (57 releases in last 90d). Pin exact version v1.3.9 in .mcp.json to avoid silent parameter drift.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/mastra-mcp-docs-server
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `@mastra/mcp-docs-server`
- Registry: NPM (https://www.npmjs.com/package/@mastra/mcp-docs-server)
- GitHub Repository: https://github.com/mastra-ai/mastra
- Vendor: Mastra
- Latest Live Version: v1.3.9
- Published Date: 2026-10-21T11:54:46.825Z
- 90-Day Release Count: 57
- Direct Dependencies: 5
- License: Apache-2.0
- Stability Score: 78/100 (Grade B)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y @mastra/mcp-docs-server@1.3.9`
- Watched Symbols / MCP Tools: mcp-docs-server, tools/list, tools/call
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
recent release v1.3.9 (up from v0.0.0-doctor-retest-20261023184401) updates Developer Tools MCP tool schemas and transport handling (57 releases in last 90d). Pin exact version v1.3.9 in .mcp.json to avoid silent parameter drift.

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

## Migration Diff: After (Verified v1.3.9 Pattern)
```
"mastra-mcp-docs-server": {
  "command": "npx",
  "args": ["-y", "@mastra/mcp-docs-server@1.3.9"]
}
```

## Recent Verified Releases
- v0.0.0-org-metrics-2-20261023192557 (published 2026-10-23) [LATEST]
- v0.0.0-doctor-retest-20261023184401 (published 2026-10-23)
- v0.0.0-org-metrics-20261023150314 (published 2026-10-23)
- v1.3.9 (published 2026-10-21)
- v1.3.8 (published 2026-10-15)
- v1.3.7 (published 2026-10-14)