MoEngage Personalized Preview API

openapi: 3.2.0
info:
  title: MoEngage Campaigns Personalized Preview API
  version: '2025-11-20'
  description: The Campaigns V5 API manages the draft campaign lifecycle — draft creation, incremental updates, validation, test sends, and post-publish management.
  contact:
    name: MoEngage Developer Team
    email: support@moengage.com
    url: https://developers.moengage.com
servers:
- url: https://api-{dc}.moengage.com/
  description: MoEngage Campaigns API Server
  variables:
    dc:
      default: '01'
      description: Data center (DC) segment in the hostname. Replace `OX` with your workspace DC (01–06 or 101). See [Data centers](/api/introduction#data-centers).
security:
- BasicAuth: []
tags:
- name: Personalized Preview
paths:
  /v5/personalization/preview:
    post:
      operationId: preview_personalized_content_v5
      summary: Personalized Preview (V5)
      description: Returns a fully resolved preview of personalised campaign content for a specific user - all user attributes, event attributes, content blocks, content APIs, product sets, and custom templates are rendered exactly as they would appear to that user at send time.
      x-mint:
        content: '#### Rate Limits


          | Rate Limit Name | Rate Limit |

          | :--- | :--- |

          | Personalized preview per minute | 10,000 requests per minute |

          '
      tags:
      - Personalized Preview
      parameters:
      - $ref: '#/components/parameters/MOE-APPKEY'
      - $ref: '#/components/parameters/X-MOE-Request-Id'
      requestBody:
        description: Personalization preview request. Supply the target user identification and the campaign content to resolve. All Jinja expressions and dynamic sources are evaluated against the specified user's profile.
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - request_id
              - channel
              - user_identification
              - campaign_content
              properties:
                request_id:
                  type: string
                  description: Unique identifier for this request. Correlates with `response_id`.
                channel:
                  type: string
                  enum:
                  - PUSH
                  - EMAIL
                  - SMS
                  description: Channel of the content to preview.
                user_identification:
                  type: object
                  description: Identifies the target user whose attributes are used to resolve personalisation.
                  required:
                  - type
                  - value
                  properties:
                    type:
                      type: string
                      enum:
                      - USER_ATTRIBUTE_UNIQUE_ID
                      - EMAIL
                      - MOE_GAID
                      - PUSH_ID
                      description: Identifier type.
                    value:
                      type: string
                      description: Value of the identifier.
                event_attributes:
                  type: object
                  description: Optional map of event attribute key-value pairs to inject into personalisation resolution. Useful for previewing event-triggered campaigns where the triggering event carries attributes.
                  additionalProperties:
                    type: string
                campaign_content:
                  type: object
                  description: The campaign content to resolve. Follows the same `campaign_content` structure as the Create Campaign request. Only the content sent here is evaluated - no saved draft is loaded.
                  example:
                    request_id: preview-001
                    channel: PUSH
                    user_identification:
                      type: USER_ATTRIBUTE_UNIQUE_ID
                      value: user_abc123
                    event_attributes:
                      product_name: Running Shoes
                      product_price: '4999'
                    campaign_content:
                      content:
                        push:
                          android:
                            template_type: BASIC
                            basic_details:
                              title: Hello, {{ user.first_name }}!
                              message: '{{ event.product_name }} is waiting for you.'
            examples:
              push_preview:
                summary: Push personalized preview
                value:
                  request_id: '{{request_id}}'
                  channel: PUSH
                  user_identification:
                    type: USER_ATTRIBUTE_UNIQUE_ID
                    value: '{{user_id}}'
                  campaign_content:
                    content:
                      push:
                        android:
                          template_type: BASIC
                          basic_details:
                            title: Hello, {{ user.first_name }}!
                            message: '{{ event.product_name }} is waiting for you.'
                  event_attributes:
                    product_name: '{{product_name}}'
              email_preview:
                summary: Email personalized preview
                value:
                  request_id: '{{request_id}}'
                  channel: EMAIL
                  user_identification:
                    type: EMAIL
                    value: '{{user_email}}'
                  campaign_content:
                    content:
                      email:
                        subject: Hello, {{ user.first_name }}!
                        html_content: <p>Your order {{ event.order_id }} has shipped.</p>
                  event_attributes:
                    order_id: '{{order_id}}'
      responses:
        '200':
          description: Preview resolved successfully. Returns the fully rendered content for the specified user.
          content:
            application/json:
              schema:
                type: object
                properties:
                  response_id:
                    type: string
                  type:
                    type: string
                    example: personalization
                  data:
                    type: object
                    properties:
                      personalized_content:
                        type: object
                        description: The resolved campaign content with all Jinja expressions, user attributes, event attributes, and dynamic sources substituted.
                        example:
                          response_id: preview-001
                          type: personalization
                          data:
                            personalized_content:
                              content:
                                push:
                                  android:
                                    template_type: BASIC
                                    basic_details:
                                      title: Hello, Jane!
                                      message: Running Shoes is waiting for you.
        '400':
          $ref: '#/components/responses/V5ValidationError'
        '401':
          $ref: '#/components/responses/V5Unauthorized'
        '429':
          $ref: '#/components/responses/V5RateLimited'
        '500':
          $ref: '#/components/responses/V5InternalError'
components:
  responses:
    V5InternalError:
      description: Unhandled server-side failure.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/V5ErrorEnvelope'
          example:
            response_id: abc-101
            error:
              code: INTERNAL_ERROR
              message: Internal server error.
              details: []
    V5ValidationError:
      description: Request failed schema or component validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/V5ErrorEnvelope'
          example:
            response_id: abc-101
            error:
              code: VALIDATION_FAILED
              message: One or more fields failed validation.
              request_id: req-push-001
              details:
              - target: campaign_delivery_type
                message: campaign_delivery_type value is required.
    V5RateLimited:
      description: Per-app rate limit exceeded. Retry after the window indicated in `Retry-After` (seconds).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/V5ErrorEnvelope'
          example:
            response_id: abc-101
            error:
              code: RATE_LIMITED
              message: Rate limit exceeded for app key.
              details: []
    V5Unauthorized:
      description: Authentication failure.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/V5ErrorEnvelope'
          example:
            response_id: abc-101
            error:
              code: UNAUTHORIZED
              message: Invalid or missing credentials.
              details: []
  parameters:
    X-MOE-Request-Id:
      name: X-MOE-Request-Id
      in: header
      required: true
      description: 'Correlates with `response_id`. Supply this header or `request_id` in the body; if both are set, they must match.

        '
      schema:
        type: string
    MOE-APPKEY:
      name: MOE-APPKEY
      in: header
      required: true
      description: 'Your MoEngage Workspace ID (App ID). Find it in the dashboard at **Settings** > **Account** > **APIs** > **Workspace ID**.

        '
      schema:
        type: string
      example: '{{workspace_id}}'
  schemas:
    V5ErrorEnvelope:
      type: object
      properties:
        response_id:
          type: string
        error:
          type: object
          properties:
            code:
              type: string
              enum:
              - VALIDATION_FAILED
              - UNPROCESSABLE_ENTITY
              - BAD_REQUEST
              - RATE_LIMITED
              - UNAUTHORIZED
              - INTERNAL_ERROR
              - FORBIDDEN
            message:
              type: string
            target:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  target:
                    type: string
                  message:
                    type: string
            request_id:
              type: string
              description: 'The `request_id` from the originating request. Use this to correlate a failed response back to the specific call that triggered it, particularly useful in high-volume or retry scenarios.


                In V1, `request_id` appeared inside the `error` object. V5 preserves this field in the same location.

                '
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic
      description: 'Authentication is done via Basic Auth. This requires a base64-encoded string of your credentials in the format ''username:password''.


        - **Username**: Use your MoEngage workspace ID (also known as the App ID). You can find it in the MoEngage dashboard at **Settings** > **Account** > **APIs** > **Workspace ID (earlier app id)**.

        - **Password**: On your MoEngage workspace, navigate to **Settings** → **Account** → **API keys** and click **Create new key**. The tab lists every API surface (Data, Segmentation, Push, Email, Campaigns, Templates, and more) and exposes per-resource actions. For Campaigns, ensure the **View**, **Create & Manage**, and **Create, Manage & Publish** checkboxes are selected.


        For more information on authentication and getting your credentials, refer to [Getting your credentials](/api/introduction#getting-your-credentials).


        Send the value in the `Authorization` header as `Basic` followed by Base64-encoding of `appkey:apisecret` (workspace ID and API key).

        '