ChatGPT App

Hello Greeting

A minimal, read-only reference app for the ChatGPT Apps SDK — the smallest end-to-end path from an MCP server to a live, submittable ChatGPT app.

What it does

Hello Greeting exposes a single tool, get_greeting. When you ask ChatGPT for a greeting, it calls get_greeting with an optional name and returns Hello, <name>!, rendered inline as a small self-contained HTML widget.

• Read-only. The handler is a pure string transform — no filesystem, no network, no mutation.
• No data collection. Nothing is stored, logged, or shared. The app has no database, accounts, or analytics.
• No authentication. The MCP endpoint is unauthenticated and has no access to your ChatGPT account, history, files, or memory.
• Self-contained widget. The inline widget makes no external fetch, script, or style requests.

How it is built

The app is a simply-mcp MCP server deployed as a stateless Cloudflare Worker. The MCP endpoint is https://chatgpt-app.cwinnov.com/mcp. It exists to de-risk and document the build-to-deploy pipeline, not to provide a consumer feature.