openai/mcp-extensions: Build plugins that feel like native ChatGPT features

OpenAI MCP Extensions introduces ChatGPT-specific capabilities to MCP, allowing developers to build plugins that function as native, first-class features. The project provides TypeScript and Python packages for MCP servers and apps, supporting features such as custom file viewers, resource searching from the composer, and CAD part selection. The repository includes documentation, examples, and is licensed under the Apache License 2.0. Open article →