Arc Pay Merchant Demo Store

This is a playground e-commerce store that lets you try out agentic payments via Arc Pay in a sandbox environment.

Agentic Commerce Protocol (ACP)

Protocol Part	Supports
Checkout Sessions	✅ All methods
Delegated Payment providers	Arc Pay
Delegated Payment method	wallet

Universal Commerce Protocol (UCP)

Protocol Part	Supports
Checkout Capability	✅
Fulfillment Extension	✅
Payment handler	Arc Pay
Payment instrument	wallet

Docs

Use the included Postman collection to try out the store API:

• GET /api/products lists products in JSON
• /api/acp/... path prefix hosts the ACP Checkout Sessions
  • POST /checkout_sessions
  • POST /checkout_sessions/{checkout-session-id}
  • GET /checkout_sessions/{checkout-session-id}
  • POST /checkout_sessions/{checkout-session-id}/complete
  • POST /checkout_sessions/{checkout-session-id}/cancel
• /api/ucp/... path prefix hosts the Google's UCP
  • POST /checkout-sessions
  • GET /checkout-sessions/{checkout-session-id}
  • PUT /checkout-sessions/{checkout-session-id}
  • POST /checkout-sessions/{checkout-session-id}/complete
  • POST /checkout-sessions/{checkout-session-id}/cancel
  • + discovery manifest at root's /.well-known/ucp

Development

Install the dependencies

npm i

Set the environment variables

cp .env.example .env

Run the development server:

npm run dev

Open http://localhost:3001 with your browser to see the result.