OpenAI Apps SDK (ChatGPT plugins)
OpenAI's toolkit for building ChatGPT plugins from MCP servers, skills and optional in-chat UI, now documented under Plugins.
Reference by OpenAI
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About
Use cases: api-integration, backend-development
Reviews
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About the protocol
- Specification
- developers.openai.com/plugins/reference
- Maintainer
- OpenAIdevelopers.openai.com
- Launched
- 2025-10-06techcrunch.com
- ChatGPT implements the open MCP Apps standard; window.openai holds optional ChatGPT-only extensions. developers.openai.com
Listings that use it
No listing declares it yet.
Signals
- Stars
- 2,375
- Forks
- 533
- Open issues
- 125
- Last commit
- Apr 15, 2026 (6 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
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Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
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Cite this page
OpenAI Apps SDK (ChatGPT plugins). Agent Mart. https://agentmart.dev/reference/openai-apps-sdk (last updated 2026-10-24)