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Google Stitch UI

Google Stitch UI generation API for project creation and screen scaffolding.

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Stitch MCP Server

Enterprise-ready Model Context Protocol (MCP) server for Google Stitch SDK — Generate beautiful web UIs from text prompts using AI.

The Stitch MCP Server bridges your AI coding assistant (Claude, Cursor, Cline, Copilot, etc.) with Google's Stitch UI Generation API. Design, generate, and scaffold production-ready HTML components directly into your workspace using natural language.

Features

Feature	Description
AI UI Generation	Generate complete HTML screens from text descriptions
Edit and Iterate	Modify existing screens with natural language prompts
Design Variants	Generate multiple design variations to explore options
Auto-Scaffold	Save generated UI directly to your project files
Multi-Client Support	Works with Claude Desktop, Cursor, Cline (VS Code), and any MCP client
One-Click Setup	Interactive installer configures everything automatically

Quick Start

Prerequisites

Node.js 18.0.0 or higher
Stitch API Key — Get one here (sign in with Google)

Installation (30 seconds)

Run the interactive setup wizard:

npx stitch-mcp-server setup

This will:

Ask which AI tools you want to configure (Claude, Cursor, Cline)
Prompt for your Stitch API key
Automatically update your MCP configuration files
Done - restart your AI tool and start generating UIs

Manual Configuration

If you prefer manual setup, add this to your MCP config file:

Claude Desktop — ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "stitch": {
      "command": "npx",
      "args": ["-y", "stitch-mcp-server@latest"],
      "env": {
        "STITCH_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cursor — .cursor/mcp.json in your workspace

{
  "mcpServers": {
    "stitch": {
      "command": "npx",
      "args": ["-y", "stitch-mcp-server@latest"],
      "env": {
        "STITCH_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cline (VS Code) — MCP Settings in Cline extension

{
  "mcpServers": {
    "stitch": {
      "command": "npx",
      "args": ["-y", "stitch-mcp-server@latest"],
      "env": {
        "STITCH_API_KEY": "your-api-key-here"
      }
    }
  }
}

Available Tools

Core Tools

Tool	Description	Example Prompt
`create_project`	Create a new Stitch project	"Create a project called 'My App'"
`list_projects`	List all your projects	"Show my Stitch projects"
`generate_screen`	Generate a UI from description	"Create a login page with email and password"
`edit_screen`	Modify an existing screen	"Make the background dark and add a sidebar"
`generate_variants`	Create design alternatives	"Show me 3 different color schemes"

Advanced Tools

Tool	Description	Use Case
`get_screen_code`	Fetch HTML source code	Get the raw HTML for a generated screen
`get_screen_image`	Get screenshot URL	Preview the generated design
`generate_and_fetch_code`	Generate + fetch in one call	Streamlined workflow for quick prototyping
`scaffold_project_files`	Save HTML to local files	Export directly to `src/components/`

Resources

stitch://projects — List all projects as context
stitch://projects/{id}/screens — List screens in a project

Prompts

create_web_app — Guided workflow to build a complete web app from idea to scaffolded files

Usage Examples

Generate a Landing Page

Create a modern landing page for a SaaS product with:
- Hero section with headline and CTA button
- Features grid with 3 columns
- Testimonials carousel
- Footer with links

Create a Dashboard

Generate an admin dashboard with:
- Sidebar navigation
- Stats cards at the top
- Data table with pagination
- Dark mode theme

Edit an Existing Design

Take the login screen and:
- Add social login buttons (Google, GitHub)
- Make it mobile responsive
- Add a "Remember me" checkbox

Local Development

# Clone the repo
git clone https://github.com/0x-Professor/Stitch-mcp-server.git
cd Stitch-mcp-server

# Install dependencies
npm install

# Build
npm run build

# Run locally
STITCH_API_KEY=your-key npm start

Running Tests

STITCH_API_KEY=your-key npm test

Tech Stack

Runtime: Node.js 18+
Language: TypeScript
MCP SDK: @modelcontextprotocol/sdk
Stitch SDK: @google/stitch-sdk
Validation: Zod
Build: tsup
Testing: Vitest

Security

This server implements several security measures:

Path Traversal Protection — Prevents writing files outside your workspace
Input Validation — All inputs validated with Zod schemas
Secure Config Storage — API keys stored with restricted file permissions (0600)
HTTP Response Validation — Proper error handling for all network requests

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for guidelines.

Fork the repository
Create your feature branch (git checkout -b feature/amazing-feature)
Commit your changes (git commit -m 'Add amazing feature')
Push to the branch (git push origin feature/amazing-feature)
Open a Pull Request

License

MIT - 0x-Professor