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The production-grade, TypeScript-first framework for building MCP servers — decorators, DI, auth, and Streamable HTTP, batteries included.

NPM - @frontmcp/sdk Node License Snyk

Docs • Quickstart • API Reference • Discord

FrontMCP turns the Model Context Protocol into a typed, declarative framework. You write clean @Tool, @Resource, and @App classes; FrontMCP handles the protocol, transport, dependency injection, sessions, auth, and execution flow — and the same server runs locally and ships to production unchanged.

import 'reflect-metadata';

import { FrontMcp, LogLevel } from '@frontmcp/sdk';

import HelloApp from './hello.app';

@FrontMcp({
  info: { name: 'Demo', version: '0.1.0' },
  apps: [HelloApp],
  http: { port: 3000 },
  logging: { level: LogLevel.Info },
})
export default class Server {}

Why FrontMCP

• Typed by default — decorators + Zod schemas give end-to-end types from input to output, with editor autocomplete and compile-time checks.
• Batteries included — auth (OAuth/JWKS/DCR), sessions, transport, discovery, and DI are built in, not bolted on.
• Ship anywhere — one codebase deploys to Node, Vercel, AWS Lambda, Cloudflare Workers, or a serverless bundle.
• Production-minded — stateful/stateless sessions, high-availability transport, structured observability, and a 95%+ tested core.
• Extensible — plugins, lifecycle hooks, OpenAPI adapters, and external MCP sub-apps when you outgrow the defaults.

Installation

Node.js 24+ required.

# New project (recommended)
npx frontmcp create my-app

# Existing project
npm i -D frontmcp @types/node@^24
npx frontmcp init

Full setup guide: Installation · Quickstart

Capabilities

Build — decorator-configured @FrontMcp server and @App domains; typed @Tool, @Resource, and @Prompt primitives; @Agent multi-step chains; and scoped Providers / DI.

Secure — Remote & Local OAuth, JWKS, DCR, per-app auth with stateful / stateless sessions (JWT or UUID transport IDs).

Connect & operate — Streamable HTTP + SSE transport, capability discovery, elicitation, hooks, HTTP-discoverable skills, external MCP sub-apps, an in-process Direct Client (connectOpenAI / connectClaude), and first-class deployment.

Extend & tooling — official plugins (Cache, Remember, CodeCall, Dashboard), the OpenAPI adapter, a UI library (HTML/React widgets, SSR, MCP Bridge), an E2E testing framework, and a CLI (create, init, dev, build, inspect, doctor).

→ Full reference: docs.agentfront.dev/frontmcp

Packages

Version Alignment

Keep all @frontmcp/* packages on the same version. A clear "version mismatch" error is thrown at boot if versions drift. (Production Build)

Contributing

PRs welcome! See CONTRIBUTING.md for workflow, coding standards, and the PR checklist.

License

Apache-2.0