HubSpot: Create a marketing event

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Operation hubspot.marketing_events_create_event

Provider route: POST /marketing/marketing-events/2026-09/events. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/hubspot with npm, or alter-sdk-hubspot with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { HubSpotIntegration } from "@alter-ai/hubspot";

async function execute(input: Parameters<HubSpotIntegration["marketingEvents"]["createEvent"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new HubSpotIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.marketingEvents.createEvent(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_hubspot import HubSpotIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = HubSpotIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.marketing_events.create_event(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
$	object	Root	Additional keys: not allowed
body	Model	Required within parent	Expand Create a marketing event — request body — body

Referenced models: Create a marketing event — request body — body

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
$	Model	Root	Expand Create a marketing event — response body

Referenced models: Create a marketing event — response body

Schemas

2 more schemas are linked from the tables above, on the schema pages.

Create a marketing event — request body — body

Field	Type	Presence	Description and constraints
$	object	Root
customProperties	array	Required within parent	A list of PropertyValues. These can be whatever kind of property names and values you want. However, they must already exist on the HubSpot account's definition of the MarketingEvent Object. If they don't they will be filtered out and not set. In order to do this you'll need to create a new PropertyGroup on the HubSpot account's MarketingEvent object for your specific app and create the Custom Property you want to track on that HubSpot account. Do not create any new default properties on the MarketingEvent object as that will apply to all HubSpot accounts.
customProperties[]	Model	Each item	Expand Create a marketing event — request body — body custom Properties item
endDateTime	string	Optional	The end date and time of the marketing event. Format: date-time
eventCancelled	boolean	Optional	Indicates if the marketing event has been cancelled. Defaults to `false`
eventCompleted	boolean	Optional	Indicates if the marketing event has been completed. Defaults to `false`
eventDescription	string	Optional	The description of the marketing event.
eventName	string	Required within parent	The name of the marketing event.
eventOrganizer	string	Required within parent	The name of the organizer of the marketing event.
eventType	string	Optional	Describes what type of event this is. For example: `WEBINAR`, `CONFERENCE`, `WORKSHOP`
eventUrl	string	Optional	A URL in the external event application where the marketing event can be managed.
externalAccountId	string	Required within parent	The accountId that is associated with this marketing event in the external event application.
externalEventId	string	Required within parent	The id of the marketing event in the external event application.
startDateTime	string	Optional	The start date and time of the marketing event. Format: date-time

Referenced models: Create a marketing event — request body — body custom Properties item

Create a marketing event — response body

Field	Type	Presence	Description and constraints
$	object	Root
customProperties	array	Required within parent	A list of PropertyValues. These can be whatever kind of property names and values you want. However, they must already exist on the HubSpot account's definition of the MarketingEvent Object. If they don't they will be filtered out and not set. In order to do this you'll need to create a new PropertyGroup on the HubSpot account's MarketingEvent object for your specific app and create the Custom Property you want to track on that HubSpot account. Do not create any new default properties on the MarketingEvent object as that will apply to all HubSpot accounts.
customProperties[]	Model	Each item	Expand Create a marketing event — response body — custom Properties item
endDateTime	string	Optional	The end date and time of the marketing event. Format: date-time
eventCancelled	boolean	Optional	Indicates if the marketing event has been cancelled.
eventCompleted	boolean	Optional	Indicates if the marketing event has been completed.
eventDescription	string	Optional	The description of the marketing event.
eventName	string	Required within parent	The name of the marketing event.
eventOrganizer	string	Required within parent	The name of the organizer of the marketing event.
eventType	string	Optional	The type of the marketing event.
eventUrl	string	Optional	The URL in the external event application where the marketing event can be managed.
objectId	string	Optional	The ID of the marketing event CRM object
startDateTime	string	Optional	The start date and time of the marketing event. Format: date-time

Referenced models: Create a marketing event — response body — custom Properties item

Create a marketing event — request body — body custom Properties item

Field	Type	Presence	Description and constraints
$	object	Root	Represents a single custom property of a marketing event, storing its name, value, metadata (like source, timestamp, and sensitivity), and related audit information for tracking changes.
dataSensitivity	string	Required within parent	Level of data sensitivity One of: high, none, standard
isEncrypted	boolean	Required within parent	Indicates whether the property is encrypted
isLargeValue	boolean	Required within parent	Indicates whether the property value is stored as a large value in the storage
maskedSubstrings	Model	Required within parent	Expand Create a marketing event — request body — body custom Properties item masked Substrings
name	string	Required within parent	Name of custom property
persistenceTimestamp	integer	Required within parent	The timestamp that indicates when the value being written is persisted in storage Format: int64
requestId	string	Required within parent	The ID of the request
selectedByUser	boolean	Required within parent	Indicates whether the property is selected
selectedByUserTimestamp	integer	Required within parent	Timestamp of when the property was selected by the user Format: int64
source	string	Required within parent	Source of the property One of: ACADEMY, ACCEPTANCE_TEST, ACTIVITY_AUTO_ASSOCIATE, ACTIVITY_LOG_REVERT, ADS, AI_GROUP, ANALYTICS, API, APPROVALS, ASSISTS, ASSOCIATIONS, AUTO_ASSOCIATE_BY_DOMAIN, AUTOMATION_JOURNEY, AUTOMATION_PLATFORM, AVATARS_SERVICE, BATCH_UPDATE, BCC_TO_CRM, BEHAVIORAL_EVENTS, BET_ASSIGNMENT, BET_CRM_CONNECTOR, BIDEN, BILLING, BOT, BREEZE_AGENT, CALCULATED, CENTRAL_EXCHANGE_RATES, CHATSPOT, CLONE_OBJECTS, COMMUNICATOR, COMPANIES, COMPANY_FAMILIES, COMPANY_INSIGHTS, CONNECTED_ACCOUNT, CONTACTS, CONTACTS_WEB, CONTENT_MEMBERSHIP, CONVERSATIONAL_ENRICHMENT, CONVERSATIONS, CRM_PROCESSES_PLATFORM, CRM_UI, CRM_UI_BULK_ACTION, CUSTOMER_AGENT, CUSTOMER_PORTAL, DATA_ENRICHMENT, DATA_QUALITY, DATASET, DEALS, DEFAULT, DELETE_OBJECTS, DI_WRITE_TO_CRM, EMAIL, EMAIL_INBOX_IMPORT, EMAIL_INTEGRATION, ENGAGEMENTS, EXTENSION, FILE_MANAGER, FLYWHEEL_PRODUCT_DATA_SYNC, FORECASTING, FORM, FORWARD_TO_CRM, GMAIL_INTEGRATION, GOALS, HEISENBERG, HELP_DESK, HELP_DESK_AI, IMPORT, INTEGRATION, INTEGRATIONS_PLATFORM, INTEGRATIONS_SYNC, INTENT, INTERNAL_PROCESSING, LEADIN, LEGAL_BASIS_REMEDIATION, MARKET_SOURCING, MARKETPLACE, MARKETS, MEETINGS, MERGE_COMPANIES, MERGE_CONTACTS, MERGE_OBJECTS, MERGE_REVERT_OBJECTS, MICROAPPS, MIGRATION, MOBILE_ANDROID, MOBILE_IOS, PAYMENTS, PIPELINE_SETTINGS, PLAYBOOKS, PORTAL_OBJECT_SYNC, PORTAL_USER_ASSOCIATOR, PRESENTATIONS, PRIMARY_AUTOMATION, PROPERTY_DEFAULT_VALUE, PROPERTY_RESTORE, PROPERTY_SETTINGS, PROSPECTING_AGENT, QUOTAS, QUOTES, RECYCLING_BIN, RESTORE_OBJECTS, REVENUE_PLATFORM, SALES, SALES_MESSAGES, SALESFORCE, SEQUENCES, SETTINGS, SIDEKICK, SIGNALS, SLACK_INTEGRATION, SMART_DATA_CAPTURE, SOCIAL, SUCCESS, TALLY, TASK, UNKNOWN, WAL_INCREMENTAL, WORK_UI, WORKFLOW_CONTACT_DELETE_ACTION, WORKFLOWS
sourceId	string	Required within parent	ID of the source of the property
sourceLabel	string	Required within parent	Label of the source of the property
sourceMetadata	string	Required within parent	Source metadata encoded as a base64 string
sourceUpstreamDeployable	string	Required within parent	Indicates which upstream service made the property change
sourceVid	array	Required within parent	An array of integers representing IDs associated with the source of the property value.
sourceVid[]	integer	Each item	Format: int64
timestamp	integer	Required within parent	Timestamp of the request Format: int64
unit	string	Required within parent	The unit
updatedByUserId	integer	Required within parent	The ID of the user who last updated the property Format: int32
useTimestampAsPersistenceTimestamp	boolean	Required within parent	Indicates if the persistence timestamp is the same as storage version timestamp
value	string	Required within parent	Custom property value

Referenced models: Create a marketing event — request body — body custom Properties item masked Substrings

Create a marketing event — request body — body custom Properties item masked Substrings

Field	Type	Presence	Description and constraints
$	object	Root
substrings	array	Required within parent	An array of masked substring objects, each defining a specific portion of a string to be masked. Each object in the array specifies the start and end positions of the substring to be masked.
substrings[]	Model	Each item	Expand Create a marketing event — request body — body custom Properties item masked Substrings substrings item

Referenced models: Create a marketing event — request body — body custom Properties item masked Substrings substrings item

Create a marketing event — response body — custom Properties item masked Substrings

Field	Type	Presence	Description and constraints
$	object	Root
substrings	array	Required within parent	An array of masked substring objects, each defining a specific portion of a string to be masked. Each object in the array specifies the start and end positions of the substring to be masked.
substrings[]	Model	Each item	Expand Create a marketing event — response body — custom Properties item masked Substrings substrings item

Referenced models: Create a marketing event — response body — custom Properties item masked Substrings substrings item

Create a marketing event — request body — body custom Properties item masked Substrings substrings item

Field	Type	Presence	Description and constraints
$	object	Root
end	integer	Required within parent	An integer indicating the ending position of the masked substring. Format: int32
label	string	Required within parent
start	integer	Required within parent	An integer indicating the starting position of the masked substring. Format: int32

Policy, approvals and errors

SDK function policy ID: hubspot.marketing_events_create_event. Catalog operation: marketing_events_create_event. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Required provider scopes: ["crm.objects.marketing_events.write"]

Official provider source