{
  "operationId": "createCheckoutSession",
  "request": {
    "method": "POST",
    "url": "https://api.shift4.com/checkout/sessions",
    "headers": {
      "Content-Type": "application/json",
      "Authorization": "Basic <base64(secret_key:)>"
    },
    "body": {
      "lineItems": [
        {
          "name": "Annual Subscription",
          "quantity": 1,
          "unitAmount": 12000,
          "currency": "USD"
        }
      ],
      "currency": "USD",
      "action": "payment",
      "collectBillingAddress": true,
      "redirectUrl": "https://merchant.example.com/return"
    }
  },
  "response": {
    "status": 200,
    "body": {
      "id": "cs_5b8d4f7e9c1a2b3c4d5e6f70a8b1c2d3",
      "clientSecret": "cs_5b8d_secret_xxx",
      "lineItems": [
        {
          "name": "Annual Subscription",
          "quantity": 1,
          "unitAmount": 12000,
          "currency": "USD"
        }
      ],
      "status": "OPEN",
      "action": "PAYMENT",
      "currency": "USD",
      "url": "https://checkout.shift4.com/session/cs_5b8d4f7e9c1a2b3c4d5e6f70a8b1c2d3",
      "redirectUrl": "https://merchant.example.com/return",
      "capture": true
    }
  }
}