# Modelcontextprotocol Fastify (@modelcontextprotocol/fastify) - AgentBreakWatch Reference

> TL;DR Verdict: Modelcontextprotocol Fastify (`@modelcontextprotocol/fastify`) is currently at v2.0.1 on NPM (published 2026-10-02), with a 90-day Stability Score of 86/100 (B+) and MEDIUM schema drift risk across 2 releases in the last 90 days. recent release v2.0.1 (up from v2.0.0) updates MCP Bridge & Transport tool schemas and transport handling (2 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/modelcontextprotocol-fastify
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `@modelcontextprotocol/fastify`
- Registry: NPM (https://www.npmjs.com/package/@modelcontextprotocol/fastify)
- GitHub Repository: https://github.com/modelcontextprotocol/typescript-sdk
- Vendor: Model Context Protocol
- Latest Live Version: v2.0.1
- Published Date: 2026-10-02T17:44:49.588Z
- 90-Day Release Count: 2
- Direct Dependencies: 0
- License: Apache-2.0
- Stability Score: 86/100 (Grade B+)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y @modelcontextprotocol/fastify@2.0.1`
- Watched Symbols / MCP Tools: tools/list, tools/call, fastify
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
recent release v2.0.1 (up from v2.0.0) updates MCP Bridge & Transport tool schemas and transport handling (2 releases in last 90d). Pin exact version v2.0.1 in .mcp.json to avoid silent parameter drift.

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

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

## Recent Verified Releases
- v2.0.1 (published 2026-10-02) [LATEST]
- v2.0.0 (published 2026-07-27)