OpenAI Apps MCP
Building OpenAI Apps with Stateless MCP Servers
Status: Production Ready
Last Updated: 2025-11-17
Dependencies: cloudflare-worker-base, hono-routing (optional, helpful for routing patterns)
Latest Versions: @modelcontextprotocol/sdk@1.21.0, hono@4.10.2, wrangler@4.42.2
Overview
This skill provides production-tested patterns for building OpenAI Apps - applications that extend ChatGPT's functionality through the Model Context Protocol (MCP). Focus on stateless MCP servers using Cloudflare Workers, which covers 80% of OpenAI Apps use cases.
What Are OpenAI Apps?
OpenAI Apps are extensions that integrate into the ChatGPT interface, allowing users to:
- Access third-party services directly in conversations
- Display interactive widgets (maps, carousels, lists, etc.)
- Execute tools that return structured UI components
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