openproject/docs/api/apiv3/paths/notification.yml

# /api/v3/notifications/{id}
---
get:
  parameters:
  - description: notification id
    example: '1'
    in: path
    name: id
    required: true
    schema:
      type: integer
  responses:
    '200':
      content:
        application/hal+json:
          schema:
            "$ref": "../components/schemas/notification_model.yml"
      description: OK
      headers: {}
    '404':
      content:
        application/hal+json:
          examples:
            response:
              value:
                _type: Error
                errorIdentifier: urn:openproject-org:api:v3:errors:NotFound
                message: The requested resource could not be found.
      description: |-
        Returned if the notification does not exist or if the user does not have permission to view it.

        **Required permission** being recipient of the notification        
      headers: {}
  tags:
  - Notifications
  description: ''
  operationId: View_notification
  summary: View notification