Chatgpt Dev Mode

chatgpt-dev-mode

Scaffold and launch ChatGPT Developer Mode MCP servers in minutes. Runs via npx, generates OAuth or non-OAuth servers, required search/fetch tools, and JSON-RPC handlers. Built-ins: PKCE OAuth, Supabase auth, Fly.io deploy, dev scripts, tests, sample tools (search, fetch, analyze, generate). Production-ready defaults, clear docs. TypeScript-first.!

ChatGPT MCP Developer Mode - Complete Tutorial

Table of Contents

1. Introduction
2. What's New in Developer Mode
3. Requirements & Limitations
4. Option 1: Non-OAuth Implementation
5. Option 2: OAuth Implementation with Supabase
6. Deployment to Fly.io
7. Common Gotchas & Solutions
8. Testing Your MCP Server
9. Troubleshooting

Introduction

ChatGPT's Developer Mode with MCP Server Tools support was officially announced on **September 9th, 2025**, marking a significant milestone in AI-developer integration. This feature enables ChatGPT to interact with custom MCP (Model Context Protocol) servers, providing unprecedented extensibility and real-world integration capabilities.

What is MCP?

Model Context Protocol (MCP) is an open protocol that standardizes how AI assistants connect with external data sources and tools. It uses JSON-RPC 2.0 for communication and supports:

• Custom tools/functions
• Resource access
• Authentication (OAuth 2.0)
• Real-time capabilities
• Persistent connections

What's New in Developer Mode

September 2025 Launch Features

The September 9th, 2025 announcement introduced groundbreaking capabilities:

Core Features

• MCP Server Integration: Direct connection to custom MCP servers
• Tool Execution: ChatGPT can now execute custom tools on your servers
• OAuth 2.0 Support: Productio