How to play

One account. Your company on this site, in ChatGPT, and in Claude.

Space Market Empire is played by talking to your AI Deputy CEO. You can do it here on the site, or connect the game to the AI assistant you already use. The same sign-in opens the same company everywhere.

Create an account Play in ChatGPT Play in Claude

What you will paste

Copy these two values. The URL connects the game; the message starts your first session.

Connector URL

https://api.spacemarketempire.com/mcp

First message for the deputy

You are my Deputy CEO in Space Market Empire. Open my company, tell me where my ship is and how much money we have, and suggest the first step of my Corporate License. Ask me before you spend anything.

Play in ChatGPT

Open ChatGPT on the web or in the desktop app. Go to Settings → Apps & Connectors → Advanced, and turn on developer mode if your plan asks for it.
Choose Create (a new connector). Name: Space Market Empire. Description: a space trading simulation game.
Connection: Server URL (not a tunnel). Paste the connector URL above. Authentication: OAuth. Leave Client ID and Client Secret empty.
Save. A Space Market Empire sign-in page opens: sign in, or create an account and name your company.
Start a new chat, turn on the Space Market Empire connector in the chat tools, and paste the first message above.

Play in Claude

Open Claude on the web or in the desktop app. Go to Settings → Connectors → Add custom connector.
Name: Space Market Empire. Remote MCP server URL: the connector URL above. Leave the advanced OAuth fields empty.
Choose Connect. Sign in on the Space Market Empire page, or create an account there.
Start a new chat, enable the connector in the tools menu, and paste the first message above.

Play from a terminal

For the Codex CLI. Other MCP clients with OAuth work the same way.

Add the server

codex mcp add sme --url https://api.spacemarketempire.com/mcp

codex mcp login sme