A specialized developer tool for scaffolding and implementing MCP servers that feature integrated React-based user interfaces.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install mcp-app-builder
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install mcp-app-builder using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is MCP App Builder?
The MCP App Builder is a comprehensive framework for creating Model Context Protocol (MCP) applications that go beyond simple text exchanges. By utilizing these Openclaw Skills, developers can build servers that output visual React components, enabling rich data visualizations, interactive forms, and complex dashboards directly within AI interfaces like ChatGPT or Claude. It bridges the gap between backend tool logic and frontend presentation by providing a standardized workflow for UI-rendering tools.
This skill ensures that developers adhere to the strict Model Context Protocol specifications while streamlining the bundling process. By leveraging single-file Vite builds and a template-based approach, it simplifies the deployment of sophisticated AI tools that require more than just markdown responses to provide value to the end-user.
MCP App Builder Use Cases
- Scaffolding new MCP servers that require visual data representation like charts or tables.
- Migrating legacy MCP servers to the modern MCP App specification for better UI support.
- Implementing custom interactive forms for AI agents to gather structured user input.
- Developing specialized dashboards that visualize real-time data fetched by AI tools.
How MCP App Builder Works
- Requirement clarification determines the necessary data visualization patterns and tool quantities.
- Tool and UI mapping defines the relationship between Zod input schemas and UI resource URIs.
- Project scaffolding initializes the environment using the Openclaw Skills template assets and pinned dependencies.
- Server implementation utilizes the registerAppTool and createServer factory patterns for per-request isolation.
- UI development employs React and Tailwind CSS, utilizing host-provided variables for theme consistency.
- The build process uses vite-plugin-singlefile to bundle the UI into portable, single-file HTML assets.
MCP App Builder Setup
To begin using this skill within your environment, follow these steps:
# Initialize your project from the provided template
cp -r assets/mcp-app-template/* ./your-app-name
# Install the specific dependency versions required by the spec
npm install
# Build the React UI and the server source
npm run build
# Launch the MCP server locally for testing
npm run serve
MCP App Builder Data Schema & Taxonomy
The MCP App Builder organizes projects into a predictable structure to ensure compatibility with Openclaw Skills hosting environments:
| File/Folder | Purpose |
|---|---|
references/mcp-app-spec.md |
The authoritative technical specification for the app. |
assets/mcp-app-template/ |
The base skeleton for new MCP App projects. |
vite.config.ts |
Configuration for bundling React UIs into single-file HTML. |
ui:// URIs |
Resource identifiers that map specific tools to their visual counterparts. |
Zod Schemas |
Used directly for tool input validation and output shaping. |
MCP App Builder Advanced Features
- Single-file UI bundling ensures zero-latency loading and simplified asset management.
- Per-request server instance creation provides enhanced security and state isolation for AI tools.
- Support for host-injected CSS variables ensures your React UI matches the look and feel of the user's IDE or chat interface.
- Native Zod integration allows for strict type safety between the AI model and the React frontend.
SKILL.md
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