post:
  tags:
    - Messages
  operationId: conversationNewMessageAttachment
  summary: Create New Message Attachment
  description: Create an attachment message.
  security:
    - userApiKey: []
  parameters:
    - $ref: '#/components/parameters/account_id'
    - $ref: '#/components/parameters/conversation_id'
  requestBody:
    required: true
    content:
      multipart/form-data:
        schema:
          type: object
          required:
            - content
          properties:
            content:
              type: string
              description: The content of the message
            message_type:
              type: string
              enum: ['outgoing', 'incoming']
            private:
              type: boolean
              description: Flag to identify if it is a private note
            attachments:
              type: array
              description: The files to be uploaded.
              items:
                type: string
                format: binary

  responses:
    '200':
      description: Success
      content:
        application/json:
          schema:
            allOf:
              - $ref: '#/components/schemas/generic_id'
              - $ref: '#/components/schemas/message'
    '404':
      description: Conversation not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/bad_request_error'
    '403':
      description: Access denied
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/bad_request_error'