FrontMCP MCPサーバー

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FrontMCP is the TypeScript framework for MCP servers. You write tools, resources and prompts as typed classes with Zod schemas, and FrontMCP serves them over the Model Context Protocol, with dependency injection, authentication, testing, agents and jobs, on Node, Vercel, AWS Lambda and Cloudflare Workers. It serves MCP 2026-07-28, the stateless revision, and the earlier ones. The docs, examples and a browser playground are at frontmcp.dev.

Write a tool. Ship a server.

Classes in, protocol out. FrontMCP handles transport, DI, sessions, auth and execution flow, and the same server runs locally and in production unchanged.

import 'reflect-metadata';

import { App, FrontMcp, Tool, ToolContext, z } from '@frontmcp/sdk';

@Tool({
  name: 'add',
  description: 'Adds two numbers together',
  inputSchema: { a: z.number(), b: z.number() },
})
class AddTool extends ToolContext {
  async execute(input: { a: number; b: number }) {
    return input.a + input.b;
  }
}

@App({ id: 'calc', name: 'Calculator', tools: [AddTool] })
class CalcApp {}

@FrontMcp({
  info: { name: 'Demo', version: '0.1.0' },
  apps: [CalcApp],
  http: { port: 3000 },
})
export default class Server {}

Start

npx frontmcp create my-app        # new project (Node 24+)
npx frontmcp init                 # or add FrontMCP to an existing one

Then follow Learn on frontmcp.dev, or browse Tools, Resources, Prompts, Agents, Auth, Plugins, Tool UI, Testing and Deployment. Try it live in the Playground.

How it compares

TypeScript MCP server frameworks for production puts FrontMCP next to the official TypeScript SDK, FastMCP for TypeScript, Prefect's FastMCP TypeScript, mcp-framework, mcp-use, ViteMCP and xmcp, on auth, testing, protocol support and deployment. Each library's hello world was run and asked which MCP revisions it serves. Why FrontMCP says when the official SDK alone is enough, and The Best TypeScript MCP Server Frameworks in 2026 sums up the field. Moving a server over? See Migrate from the TypeScript SDK and Migrate from FastMCP.

Packages

Install frontmcp (CLI) and @frontmcp/sdk. The rest is pulled in for you, or opt-in. Keep every @frontmcp/* package on the same version: they depend on each other at exact versions.

Internal, published so the above resolve: protocol, di, utils, lazy-zod.

PRs welcome: see CONTRIBUTING. Released under the Apache-2.0 license.