OpenAI App Builder (MCP)
Builds interactive ChatGPT applications and extensions using Model Context Protocol (MCP) servers on Cloudflare Workers.
This skill empowers developers to create feature-rich ChatGPT Apps by leveraging stateless MCP servers hosted on Cloudflare's edge network. It provides a standardized framework for implementing custom tool handlers and interactive HTML/JS widgets while navigating complex requirements like specific MIME types, CORS policies, and asset bindings. It effectively handles the technical bridge between ChatGPT and serverless infrastructure, ensuring production-ready deployments with the latest MCP SDK and Hono routing patterns.
Key Features
01Interactive UI widget integration using the Skybridge protocol (text/html+skybridge)
02MCP-compliant server architecture for ChatGPT Extensions and Apps
03Automated configuration for Cloudflare Workers, ASSETS bindings, and Hono routing
04117 GitHub stars
05Built-in prevention for common CORS, 404, and SSE heartbeat timeout issues
06Comprehensive support for MCP SDK 1.25.x and Zod 4 migration patterns
Use Cases
01Deploying low-latency, stateless AI integrations using Cloudflare Workers and Hono
02Developing custom ChatGPT tools with interactive data visualizations or UI widgets
03Migrating legacy ChatGPT plugins to the modern Model Context Protocol ecosystem