Hightouch AI Decisioning API

openapi: 3.0.0
info:
  title: Hightouch AI Decisioning API
  description: Hightouch Public Rest API to access syncs, models, sources and destinations
  version: 1.0.0
  contact:
    name: Hightouch
    url: https://hightouch.com
  x-harvested-from: https://api.hightouch.io/api/swagger.json
  x-harvested-on: '2026-08-13'
  x-source-document: openapi/_original/hightouch-api-openapi.json
servers:
- url: https://api.hightouch.com/api/v1
tags:
- name: AI Decisioning
paths:
  /decision-engine/flow/{flowId}:
    get:
      operationId: GetFlow
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/DecisionEngineFlow'
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
              examples:
                Example 1:
                  value:
                    id: 550e8400-e29b-41d4-a716-446655440000
                    name: My Flow
                    workspaceId: 1
                    decisionEngineId: 660e8400-e29b-41d4-a716-446655440001
                    audienceId: 100
                    status: active
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
      description: Retrieve a decision engine flow by ID
      summary: Get Decision Engine Flow
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      tags:
      - AI Decisioning
  /decision-engine/flows:
    get:
      operationId: ListFlows
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - properties:
                    hasMore:
                      type: boolean
                    data:
                      items:
                        $ref: '#/components/schemas/DecisionEngineFlow'
                      type: array
                  required:
                  - hasMore
                  - data
                  type: object
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
              examples:
                Example 1:
                  value:
                    data:
                    - id: 550e8400-e29b-41d4-a716-446655440000
                      name: My Flow
                      workspaceId: 1
                      decisionEngineId: 660e8400-e29b-41d4-a716-446655440001
                      audienceId: 100
                      status: active
                    hasMore: false
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
      description: List decision engine flows in the workspace
      summary: List Decision Engine Flows
      security:
      - bearerAuth: []
      parameters:
      - description: optional filter by flow name
        in: query
        name: name
        required: false
        schema:
          type: string
      - description: max results (default 100)
        in: query
        name: limit
        required: false
        schema:
          default: 100
          format: double
          type: number
      - description: pagination offset
        in: query
        name: offset
        required: false
        schema:
          default: 0
          format: double
          type: number
      - description: sort field
        in: query
        name: orderBy
        required: false
        schema:
          default: id
          type: string
          enum:
          - id
          - name
      tags:
      - AI Decisioning
  /decision-engine/flow/{flowId}/messages:
    get:
      operationId: ListMessages
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - properties:
                    hasMore:
                      type: boolean
                    data:
                      items:
                        $ref: '#/components/schemas/DecisionEngineMessage'
                      type: array
                  required:
                  - hasMore
                  - data
                  type: object
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
      description: List messages for a flow
      summary: List Decision Engine Messages
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      - in: query
        name: limit
        required: false
        schema:
          default: 100
          format: double
          type: number
      - in: query
        name: offset
        required: false
        schema:
          default: 0
          format: double
          type: number
      tags:
      - AI Decisioning
    post:
      operationId: CreateMessage
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/DecisionEngineMessage'
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
        '422':
          description: Validation Failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ValidateErrorJSON'
        '500':
          description: Something went wrong
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerError'
      description: Create a message in a flow
      summary: Create Decision Engine Message
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DecisionEngineMessageCreate'
      tags:
      - AI Decisioning
  /decision-engine/flow/{flowId}/messages/{messageId}:
    get:
      operationId: GetMessage
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/DecisionEngineMessage'
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
      description: Get a single message by flow and message ID
      summary: Get Decision Engine Message
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      - description: The UUID of the message
        in: path
        name: messageId
        required: true
        schema:
          type: string
      tags:
      - AI Decisioning
    patch:
      operationId: UpdateMessage
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/DecisionEngineMessage'
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
        '422':
          description: Validation Failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ValidateErrorJSON'
        '500':
          description: Something went wrong
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerError'
      description: Update a message
      summary: Update Decision Engine Message
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      - description: The UUID of the message
        in: path
        name: messageId
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DecisionEngineMessageUpdate'
      tags:
      - AI Decisioning
  /decision-engine/flow/{flowId}/run:
    post:
      operationId: RunFlow
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                anyOf:
                - $ref: '#/components/schemas/DecisionEngineRunResponse'
                - $ref: '#/components/schemas/ValidateErrorJSON'
                - $ref: '#/components/schemas/InternalServerError'
                nullable: true
              examples:
                Example 1:
                  value:
                    flowsEnqueued: 1
        '401':
          description: Unauthorized
        '403':
          description: Forbidden
        '404':
          description: Not found
        '500':
          description: Something went wrong
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerError'
      description: Trigger a decision engine run for a specific flow
      summary: Trigger Decision Engine Flow Run
      security:
      - bearerAuth: []
      parameters:
      - description: The UUID of the flow
        in: path
        name: flowId
        required: true
        schema:
          type: string
      tags:
      - AI Decisioning
components:
  schemas:
    DecisionEngineFlow:
      description: Decision Engine Flow (Public API)
      properties:
        id:
          type: string
        name:
          type: string
        workspaceId:
          type: number
          format: double
        decisionEngineId:
          type: string
        audienceId:
          type: number
          format: double
        status:
          type: string
        config:
          properties: {}
          additionalProperties: {}
          type: object
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
      required:
      - id
      - name
      - workspaceId
      - decisionEngineId
      - audienceId
      - status
      type: object
      additionalProperties: false
    DecisionEngineMessage:
      description: Decision Engine Message (Public API)
      properties:
        id:
          type: string
        name:
          type: string
        channelId:
          type: string
        config:
          properties: {}
          additionalProperties: {}
          type: object
        tags:
          properties: {}
          additionalProperties: {}
          type: object
        guardrails:
          $ref: '#/components/schemas/DecisionEngineMessageGuardrails'
        variables:
          items:
            $ref: '#/components/schemas/DecisionEngineVariable'
          type: array
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
      required:
      - id
      - name
      - channelId
      - config
      type: object
      additionalProperties: false
    DecisionEngineMessageCreate:
      description: Request body for creating a Decision Engine message
      properties:
        name:
          type: string
        channelId:
          type: string
        config:
          properties: {}
          additionalProperties: {}
          type: object
        tags:
          properties: {}
          additionalProperties: {}
          type: object
        guardrails:
          $ref: '#/components/schemas/DecisionEngineMessageGuardrails'
        variables:
          items:
            $ref: '#/components/schemas/DecisionEngineVariable'
          type: array
      required:
      - name
      - channelId
      - config
      type: object
      additionalProperties: false
    DecisionEngineMessageGuardrails:
      description: Guardrail fields on a message (max sends, eligibility dates, etc.)
      properties:
        maxSendsPerUser:
          type: number
          format: double
        maxSendsPerUserWindowDays:
          type: number
          format: double
        minOtherMessagesInBetween:
          type: number
          format: double
        firstEligibleSendDate:
          type: string
        lastEligibleSendDate:
          type: string
      type: object
      additionalProperties: false
    DecisionEngineMessageUpdate:
      description: Request body for updating a Decision Engine message
      properties:
        name:
          type: string
        config:
          properties: {}
          additionalProperties: {}
          type: object
        tags:
          properties: {}
          additionalProperties: {}
          type: object
        guardrails:
          $ref: '#/components/schemas/DecisionEngineMessageGuardrails'
        variables:
          items:
            $ref: '#/components/schemas/DecisionEngineVariable'
          type: array
      type: object
      additionalProperties: false
    DecisionEngineRunResponse:
      properties:
        flowsEnqueued:
          type: number
          format: double
          description: Number of flows that were enqueued for execution
      required:
      - flowsEnqueued
      type: object
      additionalProperties: false
    DecisionEngineVariable:
      description: Message variable (Public API)
      properties:
        name:
          type: string
          description: The variable name (must be unique within a message)
        config:
          properties:
            localizationEnabled:
              type: boolean
              description: 'When true, the Decision Engine uses each variant''s localeValues to select

                locale-appropriate content at runtime. When false or omitted, only the

                default variant value is used, even if localeValues are present.'
            maxSendsPerUserWindowDays:
              type: number
              format: double
              description: Rolling window in days for the maxSendsPerUser limit
            maxSendsPerUser:
              type: number
              format: double
              description: Maximum number of times this variable's variants can be sent to a single user
          type: object
        variants:
          items:
            $ref: '#/components/schemas/DecisionEngineVariableVariant'
          type: array
      required:
      - name
      - variants
      type: object
      additionalProperties: false
    DecisionEngineVariableVariant:
      description: Variant within a message variable (Public API)
      properties:
        value:
          type: string
          description: The default (non-localized) value for this variant
        tags:
          properties: {}
          additionalProperties:
            type: string
          type: object
          description: Key-value tags for categorizing this variant
        firstEligibleSendDate:
          type: string
          description: Earliest date this variant is eligible to be sent (ISO 8601)
        lastEligibleSendDate:
          type: string
          description: Latest date this variant is eligible to be sent (ISO 8601)
        userAudienceFilter: {}
        localeValues:
          properties: {}
          additionalProperties:
            type: string
          type: object
          description: 'Localized values for this variant, keyed by locale code (e.g. "en-US", "de-DE").

            These are only used at runtime when `localizationEnabled` is true on the parent variable.

            You can stage translations by providing localeValues while leaving localizationEnabled unset
            or false.'
      required:
      - value
      type: object
      additionalProperties: false
    InternalServerError:
      type: string
      enum:
      - Internal Server Error
      nullable: false
    ValidateErrorJSON:
      properties:
        message:
          type: string
          enum:
          - Validation failed
          nullable: false
        details:
          properties: {}
          additionalProperties: {}
          type: object
      required:
      - message
      - details
      type: object
      additionalProperties: false
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: Bearer
security:
- bearerAuth: []