openai/mcp-extensions

OpenAI MCP Extensions

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

Showcase

All examples below use the Bits & Bolts plugin, which you can try by installing the plugin.

Sidebar entrypoints

Allow users to access your app from the sidebar.

File extension handlers

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

Composer mentions

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

Extended forms

Let users select a CAD part using thumbnail choices.

Get started

0. Try it out

Install the Bits & Bolts Remote plugin:

1. Install Bits & Bolts Remote from the plugin directory. 2. Select Bits & Bolts Remote in the sidebar to open the Parts Library.

1. Create a plugin

Read the plugin documentation about how to create a plugin. Once you have a plugin…

2. Add the SDKs to your MCP server

Follow the SDK installation instructions for the current source:

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

3. Explore supported extensions

Read the spec to learn more about supported extensions.

License

This project is licensed under the Apache License 2.0.