ChatGPT does not reach this local installation directly: its MCP requests come from OpenAI's servers, while the installation listens only on your computer.
OpenAI's Secure MCP Tunnel carries them here: a tunnel client runs on this computer, and in ChatGPT the server is added with the Tunnel connection. A client on this computer, such as Codex, needs no tunnel, and ChatGPT also connects to Wikilayer.org's hosted server. Once a connection works, try the first steps.