MCP servers · UCP — Universal Commerce Protocol · MCP server
Connect Codex CLI to UCP — Universal Commerce Protocol
One line gives Codex CLI your UCP — Universal Commerce Protocol account as tools: 3 endpoints, list offers, create checkout, get download link, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.
Three steps
- Create a free 0n3 account and connect UCP — Universal Commerce Protocol. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
- Ask Codex CLI: whoami. Then: "List offers in UCP — Universal Commerce Protocol".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"
Add it to your shell profile so Codex finds it next time.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI can then do in UCP — Universal Commerce Protocol
List offers · List all active products, downloads, and plans1
List offers
GET /api/commerce/offersCreate checkout · Generate a Stripe Checkout session for a product slug1
Create a checkout
POST /api/commerce/checkoutGet download link · Verify entitlement and return a signed download URL1
Get a download link
GET /api/commerce/downloadList purchases · List the user's completed purchases0
List the user's completed purchases
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