# OpenAI Developers

> Complete documentation hub for OpenAI API, Ads, Plugins, Workspace Agents, Codex, Agentic Commerce, the developer blog, Cookbook, learning resources, and learning tracks.

Start with the product index that matches your task. Product indexes route to detailed pages; documentation indexes also provide Markdown pages and full-document exports.

## Documentation sets
- [OpenAI API guides and reference](https://developers.openai.com/api/llms.txt): Quickstart, Responses API, text and image generation, audio, Realtime and WebRTC, tools and function calling, evals, fine-tuning, models, and endpoint reference.
- [Ads API and campaign documentation](https://developers.openai.com/ads/llms.txt): Partner setup, campaigns, targeting, creatives, product feeds, conversions, measurement, and Ads API reference.
- [ChatGPT plugins and Apps SDK](https://developers.openai.com/plugins/llms.txt): Build plugins with MCP servers, tools, UI components, authentication, metadata, testing, deployment, review, and submission.
- [Workspace Agents API](https://developers.openai.com/workspace-agents/llms.txt): Authenticate API calls, trigger published workspace agent runs, and inspect run results.
- [Codex developer tools](https://developers.openai.com/codex/llms.txt): Codex CLI, IDE, cloud, config.toml, authentication, customization, automation, and security.
- [ChatGPT product documentation](https://learn.chatgpt.com/llms.txt): ChatGPT Work, administration, collaboration, and product guidance.
- [Agentic Commerce Protocol](https://developers.openai.com/commerce/llms.txt): Merchant onboarding, product feeds, checkout sessions, delegated payments, and production guidance.
- [OpenAI developer blog](https://developers.openai.com/blog/llms.txt): Engineering articles, product launches, technical deep dives, and developer announcements.
- [OpenAI Cookbook examples](https://developers.openai.com/cookbook/llms.txt): Practical code examples and patterns for APIs, agents, evals, multimodal applications, and integrations.
- [Learning resources](https://developers.openai.com/learn/llms.txt): Videos, guides, and conceptual learning material for OpenAI developers.
- [OpenAI developer showcase](https://developers.openai.com/showcase/llms.txt): Projects, demos, games, and applications built with OpenAI APIs and Codex.

## Common tasks
- [OpenAI API quickstart](https://developers.openai.com/api/docs/quickstart.md): Make your first API request with the OpenAI SDK and Responses API.
- [Plugin submission guide](https://developers.openai.com/plugins/deploy/submission.md): Prepare, review, submit, and publish a ChatGPT plugin.
- [Image generation guide](https://developers.openai.com/api/docs/guides/image-generation.md): Generate and edit images with OpenAI image models and the API.
- [Create a response API reference](https://developers.openai.com/api/reference/resources/responses/methods/create.md): Parameters and response schema for the Responses API create method.
- [Evals guide](https://developers.openai.com/api/docs/guides/evals.md): Measure and improve model and application quality with OpenAI evals.
- [Function calling guide](https://developers.openai.com/api/docs/guides/function-calling.md): Define tools and handle model requests to call application functions.
- [Cookbook image evals](https://developers.openai.com/cookbook/examples/multimodal/image_evals.md): Build evals for image generation and editing applications.
- [Realtime API with WebRTC](https://developers.openai.com/api/docs/guides/realtime-webrtc.md): Connect browser and client applications to the Realtime API.
- [Plugins and Apps SDK quickstart](https://developers.openai.com/plugins/build/app-quickstart.md): Build an MCP server with tools and an optional ChatGPT interface.
- [Trigger workspace agent runs](https://developers.openai.com/workspace-agents/trigger-runs.md): Start ChatGPT workspace agents from backend systems and automations.
- [Ads API quickstart](https://developers.openai.com/ads/api-quickstart.md): Launch your first Ads API workflow.
- [Agentic checkout specification](https://developers.openai.com/commerce/specs/checkout.md): Implement the Agentic Commerce checkout flow.
- [Codex configuration reference](https://developers.openai.com/codex/config-file/config-reference.md): Look up Codex config.toml and requirements.toml settings.
- [Codex CLI customization](https://developers.openai.com/codex/cli-customization.md): Customize the terminal interface, editor, completions, and shortcuts.

## Site navigation
- [OpenAI Developers](https://developers.openai.com/): Developer documentation and resources from OpenAI.
- [ChatGPT developer resources](https://developers.openai.com/chatgpt)
- [Learning tracks](https://developers.openai.com/tracks.md)
- [Showcase](https://developers.openai.com/showcase): Examples built with OpenAI APIs and Codex.
- [Community](https://developers.openai.com/community): Programs, meetups, and support for OpenAI developers.
- [Codex Ambassadors](https://developers.openai.com/community/codex-ambassadors)
- [Codex for Open Source](https://developers.openai.com/community/codex-for-oss)
- [Community hackathons](https://developers.openai.com/community/hackathons)
- [Community meetups](https://developers.openai.com/community/meetups)
- [Codex for Students](https://developers.openai.com/community/students)

## Learning tracks
- [AI app development: Concept to production](https://developers.openai.com/tracks/ai-application-development.md): Build, deploy, and optimize AI apps.
- [Building agents](https://developers.openai.com/tracks/building-agents.md): Learn how to build agents: Foundational concepts to practical implementation
- [Model optimization](https://developers.openai.com/tracks/model-optimization.md): Fine-tune, distill, and optimize models for the best performance and cost.