For the complete documentation index, see llms.txt. Markdown versions of documentation pages are available by appending .md to the page URL.
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Build for ChatGPT

Apps and experiences developers can build for ChatGPT users.

Plugins

Build plugins for ChatGPT and Codex

Package skills and MCP servers, with optional UI when a workflow needs it.

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Workspace Agents

Trigger published workspace agents

Programmatically kick off published ChatGPT workspace agents from backend systems and automations.

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Agentic Commerce Protocol

Build commerce flows within ChatGPT

Power guided shopping flows with the Agentic Commerce Protocol and connect merchants to ChatGPT users.

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Ads

Publish and measure ads in ChatGPT

Manage campaigns, ad groups, creatives, uploads, and insights with the Ads API.

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Resources

Learn about developer mode

ChatGPT developer mode provides full Model Context Protocol support for all tools, both read and write, in ChatGPT Plus and Pro.

Read the docs

ChatGPT Cookbook

Explore hands-on guides to build custom GPT actions to integrate with third-party tools and more.

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