ChatGPT Sites can host MCP servers, including plugin extensions — OpenAI staff confirm

#What happened

On October 1, 2026, OpenAI's Codex and Plugins leads publicly confirmed that ChatGPT Sites can host MCP servers — including plugin extensions — as reported by explainx.ai.

#What OpenAI's staff said

• On October 1, 2026, OpenAI Codex lead Tibo Sottiaux and Plugins lead Max Stoiber publicly said ChatGPT Sites can host MCP servers, as reported by explainx.ai.
• Sottiaux wrote that you can build and deploy MCP servers right through ChatGPT, then restrict access or share them.
• Stoiber said ChatGPT Sites can host MCP servers, including plugin extensions — answering a builder who asked whether OpenAI-hosted infrastructure would ever cover plugin backends.
• Stoiber's sequence: (1) create an MCP server with extensions, (2) deploy that server to Sites, (3) turn the server into a plugin. This reverses the old path: write a server, find HTTPS hosting yourself, paste /mcp into developer mode, then file a directory submission.

#Why it matters

• MCP's real bottleneck was never the protocol — it was the host: a box that stays up, speaks Streamable HTTP, and isn't your laptop. Sites now fills that role inside ChatGPT itself.
• Sites is in beta on Plus, Pro, Business, Enterprise, and Edu plans. Sharing scopes run from owner-only to invited emails, workspace, or public — but sharing a Site publicly is not the same as passing plugin directory review.
• Caveats: the public Sites docs still lag the staff posts in places; builders should keep the first version private and save before deploying, since every deploy URL is production.

#Verified note

Verified October 2, 2026.

Source: https://explainx.ai/blog/chatgpt-sites-host-mcp-servers-plugins-guide-2026