Internal name of the property, consisting of lowercase letters and numbers, starting with a letter. Used as the unique key for the property.

User-friendly label displayed in the HubSpot UI for this call property.

Specifies the type of input field (such as text, dropdown, or checkbox) displayed for this property in the UI.

The underlying data type used to store the property's value (such as string, number, or date).

Name of the property group this call property belongs to, used for organizational purposes in the UI.

Detailed explanation of the property's purpose and how it is used within call records.

Numerical value that controls the display sequence of this property relative to others in the same group.

Indicates whether the property's selectable options are sourced externally.

Indicates whether this property appears as an editable field in HubSpot forms.

Indicates whether the property's value is automatically calculated based on other data.

Determines whether the property is hidden from the standard HubSpot UI views.

Indicates whether the property is predefined by HubSpot (true) or custom-defined by the user (false).

Specifies whether the property can be archived and no longer actively used.

Indicates whether the property's definition (such as type or label) is read-only and cannot be modified.

Indicates whether the property's value is read-only and cannot be edited by users.

A serialized collection of selectable options for the property, applicable when the FieldType supports options (such as radio buttons or checkboxes).

Boolean indicating whether the value of the property is unique.