plugin

OpenAI Developers

Develop AI apps, agents, and ChatGPT Apps with OpenAI best practices

.mdOpen in ChatGPT

Build with OpenAI APIs, Agents SDK, and ChatGPT Apps, and create and save OpenAI API keys from Codex. Skills for the Agents SDK, building and submitting ChatGPT apps, OpenAI API troubleshooting and creating OpenAI Platform API keys, plus a local MCP server used to confirm API key creation. Listed in OpenAI's curated Codex marketplace (openai-curated); the manifest declares skills, an app connector and MCP server config.

Also available as

MCP App Basics (Apps SDK example)Eleven interactive widgets that each teach one MCP Apps APIapp · by OpenAI · 2.4k starsOpenAI Docs MCPSearch and read OpenAI's developer documentation from Codex or any MCP clientMCP server · by OpenAI · Remote

Install

  1. 1Add it in ChatGPT

    Open Plugins in the ChatGPT sidebar (web or desktop), search for “OpenAI Developers” and select +. You'll be asked to sign in to any connected service on first use. Then type @ in a chat to call it.

  2. 2Or install it in Codex
    codex plugin add openai-developers@openai-curated

    Start a new Codex session afterwards. You can also run /plugins inside the CLI to browse and install interactively.

Skills 4

  • Agents

    Build with the Agents API or Agents SDK

  • DevDay Guide

    Plan DevDay sessions and find official event information

  • OpenAI API Troubleshooting

    Diagnose common OpenAI API errors to unblock development

  • OpenAI API Key Setup

    Create and configure OpenAI API keys safely

Things to ask

  • “Create an OpenAI API key to use in this project”
  • “Build an agent with the Agents SDK”
  • “Build a ChatGPT app from my local MCP server and widget idea.”

Learn more

Build your first ChatGPT app with an MCP server and a UI widgetBuild a minimal ChatGPT app in TypeScript: an MCP server with one tool and an MCP Apps widget, tested in MCP Inspector and connected through developer mode.Intermediate 45 minFor builders

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