Marwan Atef (@Marwan_3atef) covered OpenAI Secure MCP Tunnel: run a tunnel-client inside your network that long-polls over outbound HTTPS, forwards work to localhost MCP, and returns on the same tunnel. ChatGPT, Codex, the Responses API, and AgentKit can reach private MCP servers without inbound ports. Docs and the openai/tunnel repo are public.

Key Takeaways

  • ✓In-network tunnel-client long-polls outbound HTTPS to localhost MCP with no inbound ports.
  • ✓Works with ChatGPT, Codex, Responses API, and AgentKit.
  • ✓Official docs and the openai/tunnel repo are public.
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Up NextOpenAI will pool ChatGPT and Codex into one token-based usage allowance starting in December for Plus, Pro, and Business; Instant chat is excluded
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