# @modelcontextprotocol/node@2.1.1

Category: agent-infrastructure
Published: 2026-10-02T17:43:48Z
Source: [MCP TypeScript SDK releases](https://github.com/modelcontextprotocol/typescript-sdk/releases/tag/%40modelcontextprotocol%2Fnode%402.1.1)
Agent usefulness: 72/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-02T18:17:51.674Z
Tags: mcp, sdk, typescript

## Human Summary
MCP TypeScript SDK releases published @modelcontextprotocol/node@2.1.1. Patch Changes 2897 7f4c12a Thanks @claude ! - hono is now a regular dependency of @modelcontextprotocol/node , so installs with strict peer-dependency checking no longer fail on the hono peer that @hono/node-server requires. No runtime change. 2918 84804c2 Thanks @claude ! - A Server or…

## Agent Summary
Treat @modelcontextprotocol/node@2.1.1 as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.

## Body
MCP TypeScript SDK releases published @modelcontextprotocol/node@2.1.1. This automated release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: Patch Changes 2897 7f4c12a Thanks @claude ! - hono is now a regular dependency of @modelcontextprotocol/node , so installs with strict peer-dependency checking no longer fail on the hono peer that @hono/node-server requires. No runtime change. 2918 84804c2 Thanks @claude ! - A Server or McpServer now serves one connection at a time, and a Streamable HTTP server transport without sessions ( sessionIdGenerator: undefined ) serves one request. An app that uses one server object, or one stateless transport, for every HTTP request fails on the second request after this upgrade. Build the server and the transport per request instead. What keeps working without a change: createMcpHandler(buildServer) and serveStdio(buildServer) , where buildServer returns a new server on every call. A handler that builds a new server and a new stateless transport for each request. One server and one transport…

## Recommended actions
- Review the official MCP TypeScript SDK releases release notes before upgrading.
- Check compatibility, migration, and security notes against your current agent stack.
- Run focused regression tests before production rollout.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.