# Ecommerce Carousel Example

An example MCP app built with [Skybridge](https://docs.skybridge.tech/home): an interactive product carousel with cart, localization, and Stripe Checkout integration.

## What This Example Showcases

- **Stripe Checkout**: Real payment flow using Stripe-hosted Checkout (redirect mode) with session status polling
- **Interactive Widget Rendering**: A React-based widget that displays an interactive product carousel directly in AI conversations
- **Tool Calling from Widget**: Widget invokes `create-checkout` and `check-checkout-status` server tools via `useCallTool()`
- **Theme Support**: Adapts to light/dark mode using the `useLayout()` hook
- **Localization**: Translates UI based on user locale via `useUser()` hook (English, French, Spanish, German)
- **Persistent State**: Maintains cart state across re-renders using `useWidgetState()` hook
- **Hot Module Replacement**: Live reloading of widget components during development

## Live Demo

[Try it in Alpic's Playground](https://ecommerce.skybridge.tech/try) to launch the live widget experience, or use the MCP URL with your client of choice: `https://ecommerce.skybridge.tech/mcp`.

## Getting Started

### Prerequisites

- Node.js 24+
- A Stripe account (sandbox mode works)

### Local Development

#### 1. Install

```bash
npm install
# or
yarn install
# or
pnpm install
# or
bun install
```

#### 2. Configure Stripe

```bash
cp .env.example .env
```

Open `.env` and paste your Stripe **test** secret key (starts with `sk_test_`). You can find it in the [Stripe Dashboard > Developers > API keys](https://dashboard.stripe.com/test/apikeys).

#### 3. Start your local server

Run the development server from the root directory:

```bash
npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev
```

This command starts:

- Your MCP server at `http://localhost:3000/mcp`.
- Skybridge DevTools UI at `http://localhost:3000/`.

#### 4. Project structure

```
│   ├── server.ts      # Server entry point
│   └── products.ts   # Product data
│   ├── src/
│   │   ├── views/      # React components (one per widget)
│   │   ├── helpers.ts    # Shared utilities
│   │   └── index.css    # Global styles
│   └── vite.config.ts
├── alpic.json            # Deployment config
├── nodemon.json          # Dev server config
└── package.json
```

### Create your first widget

#### 1. Add a new widget

- Register a widget in `src/server.ts` with a unique name (e.g., `my-widget`) using [`registerTool`](https://docs.skybridge.tech/api-reference/register-tool)
- Create a matching React component at `src/views/my-widget.tsx`. **The file name must match the widget name exactly**.

#### 2. Edit widgets with Hot Module Replacement (HMR)

Edit and save components in `src/views/` — changes will appear instantly inside your App.

#### 3. Edit server code

Modify files in `server/` and refresh the connection with your testing MCP Client to see the changes.

### Testing your App

You can test your App locally by using our DevTools UI on `http://localhost:3000` while running the dev command.

To test your app with other MCP Clients like ChatGPT, Claude or VSCode, see [Testing Your App](https://docs.skybridge.tech/quickstart/test-your-app).

## Deploy to Production

Skybridge is infrastructure vendor agnostic, and your app can be deployed on any cloud platform supporting MCP.

The simplest way to deploy your App in minutes is [Alpic](https://alpic.ai/).

1. Create an account on [Alpic platform](https://app.alpic.ai/).
2. Connect your GitHub repository to automatically deploy at each commit.
3. Use your remote App URL to connect it to MCP Clients, or use the Alpic Playground to easily test your App.

## Resources

- [Skybridge Documentation](https://docs.skybridge.tech/)
- [Apps SDK Documentation](https://developers.openai.com/apps-sdk)
- [Model Context Protocol Documentation](https://modelcontextprotocol.io/)
- [Alpic Documentation](https://docs.alpic.ai/)
