List Attributes
List all metadata attributes.
If project_id is provided, includes project-specific attributes (user attributes and project system attributes). Always includes system global attributes.
For share users, hidden attributes (configured in share settings) are filtered out from the response.
Authorizations
Aspect API key (sk_...) in Authorization header. 'Bearer ' optional.
Query Parameters
Project ID to include project-specific attributes
Response
Successful Response
Unique identifier for this attribute
Human-readable display name
Type of value this attribute holds
string, integer, float, boolean, datetime, single_select, multi_select, user_id, person_id, object_id, directory_id Whether attribute is system-defined or user-created
system, user, asset Whether this attribute can be used in filters
Whether this attribute can be shown in generic metadata display UI
Whether values for this attribute can be edited through metadata APIs
Whether assets can be sorted by this attribute
When the attribute was created
When the attribute was last updated
Project ID for project-specific attributes, null for system global
Available options for select types
Grouping category for UI display
For ASSET source: the asset property this attribute maps to
AI generation settings; null when generation is off
User who created the attribute; null for system attributes and ones created before creators were recorded