cortex gateway for ChatGPT

io.github.wellknownmcp/cortex-gateway

Self-hosted federated MCP gateway: one OAuth 2.1 MCP server in front of N apps, user-level scopes.

client:ChatGPT transport:streamable-http runtime:oci

Install cortex gateway in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.cortex-gateway.dev/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs