Do I need to manage session IDs manually?

No, the skill implements a Map-based session management system within the Express server to handle multiple concurrent MCP connections automatically.

How does the widget preview work?

The generated code includes a dedicated /preview endpoint that allows you to see your visual widgets with mock data before deploying them to ChatGPT.

What kind of apps can I build with this skill?

This skill builds ChatGPT-native applications that use the Model Context Protocol (MCP) to provide tools and interactive visual widgets directly within the chat interface.

What tech stack is used in the generated apps?

Generated apps use a modern TypeScript stack including Express, Zod for schema validation, and the official @modelcontextprotocol/sdk.

ChatGPT App Builder

Name: ChatGPT App Builder
Author: hollaugo

byhollaugo

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Desarrollo de API

Automates the end-to-end creation of standards-compliant ChatGPT Apps with interactive widgets and MCP server integration.

The ChatGPT App Builder skill provides a comprehensive, three-phase framework for developing production-grade applications specifically for the ChatGPT ecosystem. It guides developers through conceptualization based on conversational UX principles, technical design of tool topologies, and full-stack implementation. By strictly enforcing the latest Model Context Protocol (MCP) standards—including StreamableHTTPServerTransport, Skybridge MIME types, and structured content outputs—it ensures that every generated app is ready for deployment with high-performance interactive widgets and robust session management.

Características Principales

01Standardized project structure including setup scripts and environment templates

02Automated generation of MCP servers with session-based HTTP transport

0320 GitHub stars

04Guided multi-phase workflow from initial concept to working code

05Integrated HTML/CSS widget system with built-in preview and mock data support

06Strict adherence to OpenAI-specific metadata and output template requirements

Casos de Uso

01Rapidly prototyping MCP-compliant backend services for AI agents

02Standardizing the development of full-stack AI applications with consistent architecture

03Building custom interactive tools that display visual data within ChatGPT

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hollaugo/tutorials new-app

For use in Claude.ai and ChatGPT

Download Skill