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OpenAI Apps MCP

Create stateless MCP servers on Cloudflare Workers for ChatGPT Apps.

Updated Jan 29, 2026
Search Tags:#tool integration#cloudflare workers#openai#widget development#chatgpt apps#mcp server
One-click install
npx skills add https://github.com/brendadeeznuts1111/tier-1380-omega --skill openai-apps-mcp-brendadeeznuts1111
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: OpenAI Apps MCP
Source: https://github.com/brendadeeznuts1111/tier-1380-omega/tree/main/skills/openai-apps-mcp
Command: npx skills add https://github.com/brendadeeznuts1111/tier-1380-omega --skill openai-apps-mcp-brendadeeznuts1111

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill streamlines the development of ChatGPT Apps by providing a robust framework for building stateless MCP (Model Context Protocol) servers on Cloudflare Workers, enabling custom tools and interactive widgets within ChatGPT.

Core Features & Use Cases

  • MCP Server Setup: Implement MCP servers using Hono and the MCP SDK for seamless integration with OpenAI.
  • Widget Development: Serve interactive HTML/JS widgets directly from Cloudflare Workers.
  • Error Prevention: Addresses common issues like CORS errors, incorrect MIME types, and Cloudflare binding problems.
  • Use Case: Develop a custom ChatGPT App that allows users to visualize data from an external API directly within the ChatGPT interface using an interactive chart widget.

Quick Start

Use the openai-apps-mcp skill to scaffold a new ChatGPT App project with a basic MCP server and widget.

Frequently Asked Questions about OpenAI Apps MCP

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build a stateless MCP server for a ChatGPT App?▼

To build a stateless MCP server for a ChatGPT App, use this Skill to scaffold a project using Hono and the MCP SDK, then deploy it on Cloudflare Workers to handle custom tool integration and interactive widgets.

How do I serve interactive HTML widgets inside ChatGPT?▼

You can serve interactive HTML widgets inside ChatGPT by deploying a stateless MCP server on Cloudflare Workers that directly provides the HTML/JS assets to the ChatGPT interface.

Why does my ChatGPT App fail with CORS errors on Cloudflare Workers?▼

CORS errors on Cloudflare Workers often occur due to incorrect server configurations; this Skill prevents common deployment issues like CORS errors and incorrect MIME types for ChatGPT Apps.

Can I use Cloudflare Workers to deploy custom tools for OpenAI?▼

Yes, you can use Cloudflare Workers to deploy custom tools for OpenAI by creating a stateless MCP server that adheres to the OpenAI MCP Apps SDK specifications.

What is the best way to integrate an external API into a ChatGPT App?▼

The best way to integrate an external API into a ChatGPT App is by building a custom MCP server on Cloudflare Workers that fetches data and serves it through an interactive chart widget.

Do I need to follow OpenAI MCP Apps SDK specifications for widget development?▼

Yes, widget development and custom tool integration require strict adherence to OpenAI's MCP Apps SDK specifications and Cloudflare Worker configurations to function correctly.

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