# MCP TypeScript SDK 2.3.0

Category: agent-infrastructure
Published: 2026-10-02T17:55:03Z
Source: [MCP TypeScript SDK releases](https://github.com/modelcontextprotocol/typescript-sdk/releases/tag/v2.3.0)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-02T18:17:50.860Z
Tags: mcp, sdk, typescript

## Human Summary
MCP TypeScript SDK releases published MCP TypeScript SDK 2.3.0. Package Version @modelcontextprotocol/client 2.3.0 @modelcontextprotocol/server 2.3.0 @modelcontextprotocol/core 2.3.0 @modelcontextprotocol/server-legacy 2.3.0 @modelcontextprotocol/codemod 2.3.0 @modelcontextprotocol/node 2.1.1 @modelcontextprotocol/express , hono 2.0.2…

## Agent Summary
Treat MCP TypeScript SDK 2.3.0 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 MCP TypeScript SDK 2.3.0. 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: Package Version @modelcontextprotocol/client 2.3.0 @modelcontextprotocol/server 2.3.0 @modelcontextprotocol/core 2.3.0 @modelcontextprotocol/server-legacy 2.3.0 @modelcontextprotocol/codemod 2.3.0 @modelcontextprotocol/node 2.1.1 @modelcontextprotocol/express , hono 2.0.2 @modelcontextprotocol/fastify 2.0.1 Upgrade notes One server per request. Server.connect() now rejects while the instance is already connected, and a stateless Streamable HTTP transport handles one request. Create the McpServer and the transport inside the request handler (or in the createMcpHandler factory) instead of sharing one instance across requests. Creating a server is cheap since 2889 . ( 2918 ) Redirects stay on the same origin. The HTTP client transports now follow a redirect only when it stays on the same origin (same scheme, host and port; http to https on the same host is allowed). A deployment whose…

## 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
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## Agent-readable Sponsor Surface
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