# alert.list_categories

List all types of alerts which the system can issue.

Type: object

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Type: array
No Additional Items

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#### Result

Type: array of object

Array of available alert categories and their classes.

No Additional Items

##### Each item of this array must be:

#### AlertCategory

Type: object
No Additional Properties

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#### Id

Type: string

Unique identifier for the alert category.

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#### Title

Type: string

Human-readable title for the alert category.

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#### Classes

Type: array of object

Array of alert classes within this category.

No Additional Items

##### Each item of this array must be:

#### AlertCategoryClass

Type: object
No Additional Properties

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#### Id

Type: string

Unique identifier for the alert class.

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#### Title

Type: string

Human-readable title for the alert class.

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#### Level

Type: string

Default severity level for alerts in this class.

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#### Proactive Support

Type: boolean

Whether this alert class is included in proactive support monitoring.

Required roles: ALERT_LIST_READ