type: object
title: API channel
required:
  - type
properties:
  type:
    type: string
    enum: ['api']
    example: api
  webhook_url:
    type: string
    description: Webhook URL for API channel inbox callbacks
    example: 'https://example.com/webhook'
  hmac_mandatory:
    type: boolean
    description: Require HMAC verification for incoming API channel messages
    example: false
  additional_attributes:
    type: object
    description: Additional attributes stored on contacts created through the API channel
    example:
      source: mobile_app