openapi: 3.0.3
info:
  title: Silverpop Engage API (Acoustic Campaign) Authentication Transactional API
  description: The Silverpop Engage API, now provided as Acoustic Campaign (formerly IBM Watson Campaign Automation), enables digital marketers to manage contact lists, execute email campaigns, send transactional messages, and track engagement through a REST and XML-based interface.
  version: '1.0'
  contact:
    name: Acoustic Developer Support
    url: https://developer.goacoustic.com
  termsOfService: https://www.goacoustic.com/terms-of-use
servers:
- url: https://api-campaign-us-1.goacoustic.com
  description: US Production
- url: https://api-campaign-eu-1.goacoustic.com
  description: EU Production
security:
- BearerAuth: []
tags:
- name: Transactional
  description: Transactional email and SMS messaging
paths:
  /rest/transact/xmlapi:
    post:
      operationId: sendTransactionalMessage
      summary: Send Transactional Message
      description: Send a transactional email or SMS message to a single recipient using an XML API call.
      tags:
      - Transactional
      requestBody:
        required: true
        content:
          application/xml:
            schema:
              type: string
              description: XML request body per Silverpop Transact XML API specification
      responses:
        '200':
          description: Message queued for delivery
          content:
            application/xml:
              schema:
                type: string
components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: OAuth 2.0 access token. Obtain via POST /oauth/token.
externalDocs:
  description: Acoustic Campaign API Documentation
  url: https://developer.goacoustic.com/acoustic-campaign/reference/overview