curl --request GET \
  --url https://east.sandbox.spade.com/merchants \
  --header 'X-Api-Key: <api-key>'

{
  "counterparties": [
    {
      "id": "704bbd58-fb12-4bdb-9aae-2786704ea92a",
      "name": "Amazon",
      "similarity": 67.5,
      "logo": "https://static.v2.spadeapi.com/logos/de33f8973bc934c5b368a5b27155db02/light.png",
      "website": "www.amazon.com",
      "affiliates": [
        {
          "id": "49fd51a1-5a19-3e5d-8d28-eb056ecf8939",
          "name": "Amazon Pay",
          "logo": "https://static.v2.spadeapi.com/logos/49fd51a15a193e5d8d28eb056ecf8939/light.png",
          "website": "pay.amazon.com"
        }
      ],
      "alternates": [
        {
          "id": "49fd51a1-5a19-3e5d-8d28-eb056ecf8939",
          "similarity": 85.2
        }
      ],
      "expectedMerchantCategoryCodes": [
        {
          "code": "5942",
          "description": "Book Stores"
        }
      ],
      "expectedSpadeCategories": [
        {
          "id": "011-010-000-000",
          "name": "Online Marketplace",
          "icon": "https://static.v2.spadeapi.com/categories/b4b0d249b40249acb7445027d4574fc5/light.png",
          "fullCategoryHierarchy": [
            {
              "id": "011-000-000-000",
              "name": "Retail",
              "icon": "https://static.v2.spadeapi.com/categories/ee4ee39fd5474d31ac42f9e606b9040a/light.png"
            },
            {
              "id": "011-010-000-000",
              "name": "Online Marketplace",
              "icon": "https://static.v2.spadeapi.com/categories/b4b0d249b40249acb7445027d4574fc5/light.png"
            }
          ]
        }
      ]
    }
  ],
  "thirdParties": [
    {
      "id": "49fd51a1-5a19-3e5d-8d28-eb056ecf8939",
      "name": "Amazon Pay",
      "type": "payment_processor",
      "similarity": 50,
      "logo": "https://static.v2.spadeapi.com/logos/49fd51a15a193e5d8d28eb056ecf8939/light.png",
      "website": "pay.amazon.com"
    }
  ]
}