HubSpot Functions API

openapi: 3.2.0
info:
  title: Automation Actions V4 Functions API
  description: Basepom for all HubSpot Projects
  version: 2026-09
  x-hubspot-product-tier-requirements:
    marketing: PROFESSIONAL
    sales: PROFESSIONAL
    service: PROFESSIONAL
    cms: PROFESSIONAL
    commerce: PROFESSIONAL
    crmHub: PROFESSIONAL
    dataHub: PROFESSIONAL
servers:
- url: https://api.hubapi.com
tags:
- name: Functions
paths:
  /automation/actions/2026-09/{appId}/{definitionId}/functions:
    get:
      tags:
      - Functions
      summary: Retrieve functions for a given definition
      description: Retrieve all functions included in a definition.
      operationId: get-/automation/actions/2026-09/{appId}/{definitionId}/functions_getPage
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CollectionResponsePublicActionFunctionIdentifierNoPaging'
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-read
  /automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}:
    get:
      tags:
      - Functions
      summary: Retrieve functions by a type for a given definition
      description: Retrieve functions of a specific type for a given definition.
      operationId: get-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}_getByFunctionType
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublicActionFunction'
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-read
    put:
      tags:
      - Functions
      summary: Insert a function for a definition
      description: Add a function for a given definition.
      operationId: put-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}_createOrReplaceByFunctionType
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      requestBody:
        content:
          text/plain:
            schema:
              type: string
        required: true
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublicActionFunctionIdentifier'
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-write
    delete:
      tags:
      - Functions
      summary: Delete a function for a definition
      description: Delete a function within a given definition.
      operationId: delete-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}_archiveByFunctionType
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      responses:
        '204':
          description: No content
          content: {}
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-write
  /automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId}:
    get:
      tags:
      - Functions
      summary: Retrieve a function from a given definition
      description: Retrieve a specific function from a given definition.
      operationId: get-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId}_getById
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublicActionFunction'
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-read
    put:
      tags:
      - Functions
      summary: Update a function for a definition
      description: Update a function for a given definition by ID.
      operationId: put-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId}_createOrReplace
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      requestBody:
        content:
          text/plain:
            schema:
              type: string
        required: true
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PublicActionFunctionIdentifier'
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-write
    delete:
      tags:
      - Functions
      summary: Archive a function for a definition
      description: Archive a function for a specific definition.
      operationId: delete-/automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId}_archive
      parameters:
      - name: appId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: integer
          format: int32
      - name: definitionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionId
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
      - name: functionType
        in: path
        description: ''
        required: true
        style: simple
        explode: false
        schema:
          type: string
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
      responses:
        '204':
          description: No content
          content: {}
        default:
          description: ''
          $ref: '#/components/responses/Error'
      security:
      - oauth2:
        - developers-write
components:
  responses:
    Error:
      description: An error occurred.
      content:
        '*/*':
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      required:
      - category
      - correlationId
      - message
      type: object
      properties:
        category:
          type: string
          description: The error category
        context:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
          description: Context about the error condition
          example: '{invalidPropertyName=[propertyValue], missingScopes=[scope1, scope2]}'
        correlationId:
          type: string
          description: A unique identifier for the request. Include this value with any error reports or support tickets
          format: uuid
          example: aeb5f871-7f07-4993-9211-075dc63e7cbf
        errors:
          type: array
          description: further information about the error
          items:
            $ref: '#/components/schemas/ErrorDetail'
        links:
          type: object
          additionalProperties:
            type: string
          description: A map of link names to associated URIs containing documentation about the error or recommended remediation steps
        message:
          type: string
          description: A human readable message describing the error along with remediation steps where appropriate
          example: An error occurred
        subCategory:
          type: string
          description: A specific category that contains more specific detail about the error
      description: Represents an error response returned by the API when an operation fails. This component is used in various endpoints to provide detailed information about the error encountered.
      example:
        message: Invalid input (details will vary based on the error)
        correlationId: aeb5f871-7f07-4993-9211-075dc63e7cbf
        category: VALIDATION_ERROR
        links:
          knowledge-base: https://www.hubspot.com/products/service/knowledge-base
    PublicActionFunction:
      required:
      - functionSource
      - functionType
      type: object
      properties:
        functionSource:
          type: string
          description: The source code or script that defines the function's behavior.
        functionType:
          type: string
          description: 'The type of function, with accepted values: POST_ACTION_EXECUTION, POST_FETCH_OPTIONS, PRE_ACTION_EXECUTION, PRE_FETCH_OPTIONS.'
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
        id:
          type: string
          description: The unique identifier for the action function.
    ErrorDetail:
      required:
      - message
      type: object
      properties:
        code:
          type: string
          description: The status code associated with the error detail
        context:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
          description: Context about the error condition
          example: '{missingScopes=[scope1, scope2]}'
        in:
          type: string
          description: The name of the field or parameter in which the error was found.
        message:
          type: string
          description: A human readable message describing the error along with remediation steps where appropriate
        subCategory:
          type: string
          description: A specific category that contains more specific detail about the error
      description: Represents detailed information about an error that occurred in the API. This component is used to provide additional context and specifics about errors, typically as part of an error response.
    CollectionResponsePublicActionFunctionIdentifierNoPaging:
      required:
      - results
      type: object
      properties:
        results:
          type: array
          items:
            $ref: '#/components/schemas/PublicActionFunctionIdentifier'
    PublicActionFunctionIdentifier:
      required:
      - functionType
      type: object
      properties:
        functionType:
          type: string
          description: 'The type of function, with accepted values: POST_ACTION_EXECUTION, POST_FETCH_OPTIONS, PRE_ACTION_EXECUTION, PRE_FETCH_OPTIONS.'
          enum:
          - POST_ACTION_EXECUTION
          - POST_FETCH_OPTIONS
          - PRE_ACTION_EXECUTION
          - PRE_FETCH_OPTIONS
        id:
          type: string
          description: The unique identifier for the function.
  securitySchemes:
    developer_hapikey:
      type: apiKey
      name: hapikey
      in: query
    oauth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://app.hubspot.com/oauth/authorize
          tokenUrl: https://api.hubapi.com/oauth/v1/token
          scopes:
            automation: ''
            developers-read: ''
            developers-write: ''
    private_apps:
      type: apiKey
      name: private-app
      in: header
    private_apps_legacy:
      type: apiKey
      name: private-app-legacy
      in: header
x-hubspot-available-client-libraries:
- Node
- Python
- Ruby
- PHP
x-hubspot-product-tier-requirements:
  marketing: PROFESSIONAL
  sales: PROFESSIONAL
  service: PROFESSIONAL
  cms: PROFESSIONAL
  commerce: PROFESSIONAL
  crmHub: PROFESSIONAL
  dataHub: PROFESSIONAL