curl -X GET \
 /checkout-link-items/{id} \
 --header "Authorization: Bearer <token>"

{
  "type": "<any>",
  "product": {
    "id": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
    "name": "Basic",
    "description": "For small teams.",
    "type": "product",
    "invoiceVisibility": "always",
    "customFields": {
      "field1": "value1",
      "field2": "value2"
    }
  },
  "quantity": 1,
  "plan": {
    "id": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
    "family": {
      "id": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b"
    },
    "code": "basic-m2023",
    "originProduct": {
      "id": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
      "name": "Basic",
      "description": "For small teams.",
      "type": "product",
      "invoiceVisibility": "always",
      "customFields": {
        "field1": "value1",
        "field2": "value2"
      }
    },
    "allowCheckout": true,
    "status": "<any>",
    "createdAt": "2023-11-07T05:31:56Z",
    "name": "<string>",
    "description": "<string>"
  },
  "price": {
    "id": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
    "internalName": "Exclusive pricing for partners.",
    "status": "<any>",
    "salesChannel": {},
    "type": "<any>",
    "applyTrial": true,
    "payInAdvance": true,
    "proRata": true,
    "freeUnits": {},
    "billingInterval": "1M",
    "showPricePerInterval": "1M",
    "currencyCode": {},
    "price": {
      "amount": 123,
      "createdAt": "2021-01-01T00:00:00+00:00",
      "updatedAt": "2021-01-01T00:00:00+00:00",
      "tenantId": "<string>"
    },
    "custom": true,
    "charge": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
    "productSetOption": "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b",
    "product": "<any>",
    "customer": "<any>",
    "inUse": true,
    "checkoutLinkIds": [
      "ad8f1c2c-3b1c-4b0a-8b0a-0b0b0b0b0b0b"
    ]
  },
  "periods": [
    {
      "contractPeriod": {},
      "cancellationPeriod": {}
    }
  ]
}