OpenAI MCP Extensions adds ChatGPT-specific capabilities to MCP so developers can build plugins that feel like native, first-class features.

1. Install Bits & Bolts Remote.

2. Select the Bits & Bolts icon in the sidebar to open the Parts Library.

3. Open Extensions walkthrough to explore a demo of each major extension.

   

Allow users to access your app from the sidebar.

Render custom file viewers when users open a supported file type.

Let users search your plugin’s resources from the composer and add references to a message.

Let users select a CAD part using thumbnail choices.

Ask @Plugin Creator in Codex to build a new plugin or improve an existing one for you.

• TypeScript: @openai/mcp-extensions for MCP servers and Apps.
• Python: openai-mcp-extensions for MCP servers.

• docs/spec.md lists all supported extensions.
• docs/patterns.md covers best practices.
• CHANGELOG.md lists API changes.
• Bits & Bolts source shows how to integrate extensions in practice.

Notice any gaps in extensions for your plugin? Submit feedback here.

This project is licensed under the Apache License 2.0.