{
  "ucp": {
    "version": "2026-01-11",
    "services": {
      "dev.ucp.shopping": {
        "version": "2026-01-11",
        "spec": "https://ucp.dev/specification/overview",
        "rest": {
          "schema": "https://ucp.dev/services/shopping/rest.openapi.json",
          "endpoint": "https://merchant-demo.arcpay.ai/api/ucp"
        }
      }
    },
    "capabilities": [
      {
        "name": "dev.ucp.shopping.checkout",
        "version": "2026-01-11",
        "spec": "https://ucp.dev/specification/checkout",
        "schema": "https://ucp.dev/schemas/shopping/checkout.json"
      },
      {
        "name": "dev.ucp.shopping.fulfillment",
        "version": "2026-01-11",
        "spec": "https://ucp.dev/specification/fulfillment",
        "schema": "https://ucp.dev/schemas/shopping/fulfillment.json",
        "extends": "dev.ucp.shopping.checkout"
      }
    ]
  },
  "payment": {
    "handlers": [
      {
        "id": "arcpay",
        "name": "ai.arcpay.wallet",
        "version": "2026-01-15",
        "spec": "https://arcpay.ai/ucp/guides/arcpay-payment-handler",
        "config_schema": "https://arcpay.ai/ucp/schemas/arcpay_config.json",
        "instrument_schemas": [
          "https://arcpay.ai/ucp/schemas/arcpay_wallet_payment_instrument.json"
        ],
        "config": {
          "environment": "sandbox",
          "merchant_id": "super_cafe"
        }
      }
    ]
  },
  "signing_keys": [
    {
      "kid": "business_2025",
      "kty": "EC",
      "crv": "P-256",
      "x": "JnNLFVBEcTY33sJG9rGlAy2zXfGX2NDaPiHVdtrpWi4",
      "y": "8wb2NBpYSXQ2QzfTOMBTXLZibydN2qGKP2LKlssResM",
      "use": "sig",
      "alg": "ES256"
    }
  ]
}