The official TypeScript SDK for Model Context Protocol servers and clients
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Typescript SDK is an MCP server that the official TypeScript SDK for Model Context Protocol servers and clients. Its tool list has not been published yet over stdio and http, requires no API key, and scores 94/100 on MCPpedia's security, maintenance and efficiency rubric.
Config is the same across clients — only the file and path differ.
{
"mcpServers": {
"typescript-sdk": {
"args": [
"-y",
"@modelcontextprotocol/server"
],
"command": "npx"
}
}
}Are you the author?
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[!IMPORTANT] This is the main branch which contains v2 of the SDK (currently in development, pre-alpha). > We anticipate a stable v2 release in Q1 2026. Until then, v1.x remains the recommended version for production use. v1.x will continue to receive bug fixes and security updates for at least 6 months after v2 ships to give people time to upgrade. > For v1 documentation, see the V1 API docs. For v2 API docs, see /v2/.
This server supports HTTP transport. Be the first to test it — help the community know if it works.
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No known CVEs.
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[!IMPORTANT] This is the
mainbranch — v2 of the SDK (@modelcontextprotocol/server,@modelcontextprotocol/client), implementing the 2026-07-28 MCP spec.Have feedback? Please open a v2 issue — it is the most useful thing you can do for the SDK right now. The v2 documentation starts with a ten-minute server tutorial.
v2 is the stable release line, released alongside the 2026-07-28 spec. v1.x continues to receive bug fixes and security updates for at least 6 months after v2's release. v1 documentation: ts.sdk.modelcontextprotocol.io · v2:
/v2/.
[!WARNING] We're limiting pull requests to 1 per new contributor while v2 settles after the 2026-07-28 spec release.
Issues are the most useful feedback right now — we'll reopen PRs as v2 stabilizes.
The Model Context Protocol (MCP) allows applications to provide context for LLMs in a standardized way, separating the concerns of providing context from the actual LLM interaction.
This repository contains the TypeScript SDK implementation of the MCP specification. It runs on Node.js, Bun, and Deno, and ships:
examples/)This monorepo publishes split packages:
@modelcontextprotocol/server: build MCP servers@modelcontextprotocol/client: build MCP clientsTool and prompt schemas use Standard Schema — bring Zod v4, Valibot, ArkType, or any compatible library.
The SDK also publishes small "middleware" packages under packages/middleware/ that help you wire MCP into a specific runtime or web framework.
They are intentionally thin adapters: they should not introduce new MCP functionality or business logic. See packages/middleware/README.md for details.
@modelcontextprotocol/node: Node.js Streamable HTTP transport wrapper for IncomingMessage / ServerResponse@modelcontextprotocol/express: Express helpers (app defaults + Host header validation)@modelcontextprotocol/fastify: Fastify helpers (app defaults + Host header validation)@modelcontextprotocol/hono: Hono helpers (app defaults + JSON body parsing hook + Host header validation)npm i
... [View full README on GitHub](https://github.com/modelcontextprotocol/typescript-sdk#readme)