Hosting ChatGPT Apps on MCPAC Platform (github.com)

OpenAI’s Apps SDK examples are live-hosted via the mcp-agent cloud, demonstrating how ChatGPT Apps can be wired to external systems using the open Model Context Protocol (MCP). The repo includes ready-to-try demos—e.g., a Pizzaz widget suite (./pizzaz_server_python) and a 3D Solar System UI (./solar-system_server_python)—exposed as public SSE endpoints on deployments.mcp-agent.com so developers can interact with UI-bearing tools directly from ChatGPT developer mode. The project is MIT‑licensed and accepts issues/PRs for community-driven improvements. This matters because it showcases a concrete, hosted workflow for MCP-based apps: MCP defines a standard for model↔system integration, the Apps SDK lets LLMs invoke richer, stateful app experiences, and mcp-agent provides hosting for MCP servers, App servers, and Agent servers. Technically, these examples reveal practical details (SSE streaming endpoints, app server implementations in Python, and the mapping between App SDK calls and MCP servers) that lower the barrier to building interactive, multimodal ChatGPT integrations. For AI/ML practitioners this accelerates prototyping of tool-assisted agents and UI integrations while highlighting operational considerations—endpoint hosting, streaming protocols, and open‑source licensing—important for production deployments.