List classes

Example response

{
  "data": [
    {
      "slug": "invoice",
      "name": "Invoice",
      "description": "Invoice fields extracted from PDF invoices",
      "color": "#0ea5e9",
      "schemaHash": "9b7c7b2f6f9f0c52d32a1a6d0d1f3c747c1f9e8b132a4d2e2b9a7c6f0e1d2c3b",
      "classHash": "a1b2c3d4e5f6789012345678901234567890abcdef1234567890abcdef123456",
      "fields": [
        {
          "name": "invoice_number",
          "type": "string",
          "description": "Invoice number",
          "required": true
        },
        {
          "name": "invoice_date",
          "type": "date",
          "description": "Invoice date",
          "required": true
        },
        {
          "name": "total_amount",
          "type": "currency",
          "description": "Total amount",
          "required": true
        },
        {
          "name": "line_items",
          "type": "array",
          "description": "Line items",
          "required": false,
          "arrayItemFields": [
            {
              "name": "description",
              "type": "string",
              "required": true
            },
            {
              "name": "quantity",
              "type": "number",
              "required": false
            },
            {
              "name": "amount",
              "type": "currency",
              "required": true
            }
          ]
        }
      ],
      "createdAt": "2026-05-22T13:00:00Z",
      "updatedAt": "2026-05-22T13:00:00Z"
    }
  ],
  "meta": {
    "nextCursor": "Q1VSU09SOjI=",
    "hasMore": false
  }
}