# Openai Docs

> Use when the user asks how to build with OpenAI products or APIs and needs up-to-date official documentation with citations (for example: Codex, Responses API, Chat Completions, Apps SDK, Agents SDK, Realtime, model capabilities or limits); prioritize OpenAI docs MCP tools and restrict any fallback browsing to official OpenAI domains.

- Skill: `lidge-jun/openai-docs` (Agent Skill)
- Install (CLI): `npx skillmds@latest add lidge-jun/openai-docs`
- Raw SKILL.md: https://api.skillmd.com/api/skills/lidge-jun/openai-docs/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: lidge-jun (https://skillmd.com/u/lidge-jun)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/lidge-jun/openai-docs

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# OpenAI Docs

Provide authoritative, current guidance from OpenAI developer docs using the developers.openai.com MCP server. Prioritize MCP doc tools over web search for OpenAI-related questions. Fall back to web search only when MCP returns no meaningful results.

## Quick start

- Use `mcp__openaiDeveloperDocs__search_openai_docs` to find the most relevant doc pages.
- Use `mcp__openaiDeveloperDocs__fetch_openai_doc` to pull exact sections and quote/paraphrase accurately.
- Use `mcp__openaiDeveloperDocs__list_openai_docs` only when you need to browse or discover pages without a clear query.

## OpenAI product snapshots

> ⚠️ **Assistants API sunset**: The Assistants API (v1 and v2) will be **shut down on August 26, 2026**. Migrate to the Responses API for stateful workflows, or use the new Conversations API for persistence/state management.

> **Current recommended models (June 2026)**: `gpt-5.5` (flagship), `gpt-5.4` (fast/cost-effective), `gpt-oss-120b` / `gpt-oss-20b` (open-weight reasoning).

1. Apps SDK: Build ChatGPT apps by providing a web component UI and an MCP server that exposes your app's tools to ChatGPT.
2. Responses API: A unified endpoint designed for stateful, multimodal, tool-using interactions in agentic workflows. Now supports inline moderation.
3. Conversations API: New persistence/state API for multi-turn conversations. Replaces Threads from the deprecated Assistants API.
4. Chat Completions API: Generate a model response from a list of messages comprising a conversation.
5. Codex: OpenAI's coding agent for software development that can write, understand, review, and debug code. Uses container sessions (5-minute minimum billing).
6. gpt-oss: Open-weight OpenAI reasoning models (gpt-oss-120b and gpt-oss-20b) released under the Apache 2.0 license.
7. Realtime API: Build low-latency, multimodal experiences including natural speech-to-speech conversations.
8. Agents SDK: A toolkit for building agentic apps where a model can use tools and context, hand off to other agents, stream partial results, and keep a full trace.
9. Lockdown Mode: Security feature for restricting agent/API capabilities in production environments.

> **Note**: Product snapshots are point-in-time references. Always verify current details via MCP tools or the official docs before implementing.


## If MCP server is missing

1. Run: `codex mcp add openaiDeveloperDocs --url https://developers.openai.com/mcp`
2. If it fails due to permissions, retry with escalated permissions (include a 1-sentence justification).
3. Only if the escalated attempt also fails, ask the user to run the install command.
4. Ask the user to restart Codex, then re-run the doc search.

## Workflow

1. Clarify the product scope (Codex, OpenAI API, or ChatGPT Apps SDK) and the task.
2. Search docs with a precise query.
3. Fetch the best page and the specific section needed (use `anchor` when possible).
4. Answer with concise guidance and cite the doc source.
5. Provide code snippets only when the docs support them.

## Quality rules

- Treat OpenAI docs as source of truth; flag when docs are silent on a topic.
- Prefer paraphrase with citations; keep direct quotes short.
- When pages disagree, cite both and note the difference.

## Tooling notes

- Use MCP doc tools before web search for OpenAI questions.
- When falling back to web search, restrict to official OpenAI domains (developers.openai.com, platform.openai.com) and cite sources.