Use it from ChatGPT

ChatGPT can deploy to gangway the way Claude Code and Codex do: you add gangway as a custom connector, sign in once, and ChatGPT gets the same tools. What it makes lands on your server, on your domain, not on ChatGPT Sites.

Before you start

• A ChatGPT plan with developer mode. Custom MCP connectors need Plus, Pro, Business, Enterprise or Edu. On Business and Enterprise, a workspace admin may have to allow them.
• gangway reachable from the internet. ChatGPT calls your MCP URL from OpenAI’s servers, so https://mcp.<your domain>/ must answer from outside your network. A local or lan install, or one behind a VPN only, cannot be used from ChatGPT. See Choosing a mode.
• MCP turned on, under Admin → Server → Surfaces.

1. Turn on developer mode

In ChatGPT, open Settings and turn on Developer mode. It has been under Apps & Connectors → Advanced settings and, more recently, Security and login; OpenAI moves it now and then.

2. Add gangway as a connector

Under Settings → Apps & Connectors, choose Create and fill in:

Field	Value
Name	gangway
Description	Deploys apps and artifacts to my server
MCP server URL	https://mcp.<your domain>/
Authentication	OAuth

ChatGPT registers itself with a Client ID Metadata Document, which gangway accepts; there is no client ID or secret to paste.

3. Sign in and approve

ChatGPT opens gangway in your browser. Sign in, and gangway asks you to approve ChatGPT and choose its scopes, as for any agent. Pick artifacts if you only want ChatGPT to deploy static sites and artifacts, and touch only what it deployed itself.

ChatGPT is then listed under Account → Connected agents, where you can disconnect it.

4. Use it

Start a new chat, turn on the gangway connector for it, and ask for something:

Make a one-page report on last quarter’s signups and put it on gangway.

ChatGPT deploys and replies with the URL. Ask for a change and it redeploys to the same URL. gangway’s MCP server sends every client the same instructions for its templates, so documents, decks and boards come out in your theme whichever agent made them.

If it does not connect

• ChatGPT cannot reach the server. From a machine outside your network, run curl -i https://mcp.<your domain>/. gangway answers 405 Method Not Allowed, since MCP wants a POST; anything else, or no answer, means ChatGPT cannot reach it either. Check your reverse proxy and DNS.
• Sign-in stops on a gangway error page. The page says why the client was refused.
• The tools are listed but every chat fails. Upgrade gangway; v0.1.0 published tool schemas ChatGPT could not read.
• Something else. See Troubleshooting.