curl --request GET \
  --url https://api.partoo.co/v2/custom_fields \
  --header 'x-APIKey: <api-key>'

{
  "custom_fields": [
    {
      "id": 1,
      "name": "Is Active",
      "description": "Whether the business is currently active",
      "type": "BOOLEAN",
      "order": 1,
      "section_id": null,
      "section_name": null,
      "slug": "is-active"
    },
    {
      "id": 2,
      "name": "Description",
      "description": "Business description text",
      "type": "TEXT",
      "max_len": 500,
      "order": 2,
      "section_id": 1,
      "section_name": "Section 1",
      "slug": "description"
    },
    {
      "id": 3,
      "name": "Employee Count",
      "description": "Number of employees",
      "type": "INTEGER",
      "min": 0,
      "max": 10000,
      "order": 3,
      "section_id": 1,
      "section_name": "Section 1",
      "slug": "employee-count"
    },
    {
      "id": 4,
      "name": "Rating",
      "description": "Business rating score",
      "type": "FLOAT",
      "min": 0,
      "max": 5,
      "order": 4,
      "section_id": 2,
      "section_name": "Section 2",
      "slug": "rating"
    },
    {
      "id": 5,
      "name": "Category",
      "description": "Business category type",
      "type": "SINGLE_SELECT",
      "possible_values": [
        "Premium",
        "Standard",
        "Basic"
      ],
      "order": 5,
      "section_id": 2,
      "section_name": "Section 2",
      "slug": "category"
    },
    {
      "id": 6,
      "name": "Tags",
      "description": "Business tags for classification",
      "type": "MULTIPLE_SELECT",
      "possible_values": [
        "Featured",
        "New",
        "Sale",
        "Popular"
      ],
      "max_selected_values": 3,
      "order": 6,
      "section_id": 3,
      "section_name": "Section 3",
      "slug": "tags"
    },
    {
      "id": 7,
      "name": "Product Images",
      "description": "Product image selections",
      "type": "MULTIPLE_SELECT_IMAGE",
      "possible_values": [
        "image1",
        "image2",
        "image3"
      ],
      "possible_images_urls": [
        "https://example.com/img1.jpg",
        "https://example.com/img2.jpg",
        "https://example.com/img3.jpg"
      ],
      "possible_images_labels": [
        "Image 1",
        "Image 2",
        "Image 3"
      ],
      "max_selected_values": 2,
      "order": 7,
      "section_id": 3,
      "section_name": "Section 3",
      "slug": "product-images"
    },
    {
      "id": 8,
      "name": "Gallery",
      "description": "Image gallery uploader",
      "type": "IMAGES_UPLOADER",
      "text_fields": [
        {
          "text_field": "Caption",
          "max_length": 100
        },
        {
          "text_field": "Alt Text",
          "max_length": 50
        }
      ],
      "order": 8,
      "section_id": 4,
      "section_name": "Section 4",
      "slug": "gallery"
    }
  ]
}