# List custom attributes definitions List all custom attributes in an organization. Endpoint: GET /beta/custom-attributes Version: beta Security: ApiKeyAuth ## Response 200 fields (application/json): - `data` (array) - `data.id` (string, required) - `data.entityType` (string, required) values: [Contact, Conversation] - `data.identifier` (string, required) - `data.label` (string, required) - `data.inputDefinition` (any, required) - `data.description` (string) - `data.createdAt` (string, required) - `data.updatedAt` (string) - `data.isRequired` (boolean, required) - `data.isArchived` (boolean, required) - `data.isDeactivated` (boolean, required) ## Response 400 fields (application/json): - `message` (string, required) ## Response 500 fields (application/json): - `message` (string, required)