curl --request POST \
  --url https://api.hubapi.com/crm-object-schemas/2026-03/schemas \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "allowsSensitiveProperties": true,
  "associatedObjects": [
    "<string>"
  ],
  "labels": {
    "plural": "<string>",
    "singular": "<string>"
  },
  "name": "<string>",
  "properties": [
    {
      "fieldType": "<string>",
      "label": "<string>",
      "name": "<string>",
      "description": "<string>",
      "displayOrder": 123,
      "externalOptionsReferenceType": "<string>",
      "formField": true,
      "groupName": "<string>",
      "hasUniqueValue": true,
      "hidden": true,
      "options": [
        {
          "displayOrder": 123,
          "hidden": true,
          "label": "<string>",
          "value": "<string>",
          "description": "<string>"
        }
      ],
      "referencedObjectType": "<string>",
      "searchableInGlobalSearch": true,
      "showCurrencySymbol": true
    }
  ],
  "requiredProperties": [
    "<string>"
  ],
  "searchableProperties": [
    "<string>"
  ],
  "secondaryDisplayProperties": [
    "<string>"
  ],
  "description": "<string>",
  "primaryDisplayProperty": "<string>"
}
'

{
  "allowsSensitiveProperties": true,
  "archived": true,
  "associations": [
    {
      "fromObjectTypeId": "<string>",
      "id": "<string>",
      "toObjectTypeId": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "name": "<string>",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "fullyQualifiedName": "<string>",
  "id": "<string>",
  "labels": {
    "plural": "<string>",
    "singular": "<string>"
  },
  "name": "<string>",
  "objectTypeId": "<string>",
  "properties": [
    {
      "description": "<string>",
      "fieldType": "<string>",
      "groupName": "<string>",
      "label": "<string>",
      "name": "<string>",
      "options": [
        {
          "hidden": true,
          "label": "<string>",
          "value": "<string>",
          "description": "<string>",
          "displayOrder": 123
        }
      ],
      "type": "<string>",
      "archived": true,
      "archivedAt": "2023-11-07T05:31:56Z",
      "calculated": true,
      "calculationFormula": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "createdUserId": "<string>",
      "currencyPropertyName": "<string>",
      "displayOrder": 123,
      "externalOptions": true,
      "formField": true,
      "hasUniqueValue": true,
      "hidden": false,
      "hubspotDefined": true,
      "modificationMetadata": {
        "archivable": true,
        "readOnlyDefinition": true,
        "readOnlyValue": true,
        "readOnlyOptions": true
      },
      "referencedObjectType": "<string>",
      "sensitiveDataCategories": [
        "<string>"
      ],
      "showCurrencySymbol": true,
      "updatedAt": "2023-11-07T05:31:56Z",
      "updatedUserId": "<string>"
    }
  ],
  "requiredProperties": [
    "<string>"
  ],
  "searchableProperties": [
    "<string>"
  ],
  "secondaryDisplayProperties": [
    "<string>"
  ],
  "createdAt": "2023-11-07T05:31:56Z",
  "createdByUserId": 123,
  "description": "<string>",
  "primaryDisplayProperty": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z",
  "updatedByUserId": 123
}