Openai Docs

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.