HubSpot: Merge objects — carts merge

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Operation hubspot.carts_merge

Provider route: POST /crm/objects/2026-09/carts/merge. 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["carts"]["merge"]>[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.carts.merge(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.carts.merge(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 Merge goal targets — request body — body

Referenced models: Merge goal targets — 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 — carts create Cart — response body

Referenced models: Create — carts create Cart — response body

Schemas

Merge goal targets — request body — body

Field	Type	Presence	Description and constraints
$	object	Root	Input data for merging two records.
objectIdToMerge	string	Required within parent	The unique identifier of the object that will be merged into the primary object. It is a string.
primaryObjectId	string	Required within parent	The unique identifier of the object that will remain as the primary object after the merge. It is a string.

Create — carts create Cart — response body

Field	Type	Presence	Description and constraints
$	object	Root	A simple public object.
archived	boolean	Required within parent	A boolean indicating whether this object has been archived.
archivedAt	string	Optional	The date and time when this object was archived, in ISO 8601 format. Format: date-time
createdAt	string	Required within parent	The date and time when this object was created, in ISO 8601 format. Format: date-time
id	string	Required within parent	The unique identifier for this object.
objectWriteTraceId	string	Optional	A string identifier used for tracing the write operations on this object.
properties	object	Required within parent	A map of property names to their current values, represented as strings. Additional keys: see wildcard field
properties.*	string	Additional keys
propertiesWithHistory	object	Optional	A map of property names to their historical values, each represented as an array of values with timestamps. Additional keys: see wildcard field
propertiesWithHistory.*	array	Additional keys
propertiesWithHistory.*[]	Model	Each item	Expand Read — carts get Cart — response body — properties With History value item
updatedAt	string	Required within parent	The date and time when this object was last updated, in ISO 8601 format. Format: date-time
url	string	Optional	A string representing the URL associated with this object.
warnings	array	Optional	An array of warnings related to this object, each containing a category, message, and context.
warnings[]	Model	Each item	Expand Read — carts get Cart — response body — warnings item

Referenced models: Read — carts get Cart — response body — warnings item, Read — carts get Cart — response body — properties With History value item

Read — carts get Cart — response body — warnings item

Field	Type	Presence	Description and constraints
$	object	Root	Represents a warning message related to a public object in HubSpot, providing details about the nature and context of the warning.
category	string	Required within parent	A string representing the category of the warning.
context	object	Required within parent	An object providing additional context for the warning, with string properties. Additional keys: see wildcard field
context.*	string	Additional keys
message	string	Required within parent	A string containing the warning message.

Read — carts get Cart — response body — properties With History value item

Field	Type	Presence	Description and constraints
$	object	Root	Property model that includes timestamp.
sourceId	string	Optional	A string identifier for the specific source of the value.
sourceLabel	string	Optional	A string label providing additional context or description for the source.
sourceType	string	Required within parent	A string indicating the type of source from which the value was obtained. This field is required.
timestamp	string	Required within parent	The date and time when the value was recorded, in ISO 8601 format. Format: date-time
updatedByUserId	JSON	Optional
updatedByUserId (anyOf 1)	integer	Alternative	An integer representing the ID of the user who last updated the value. Format: int32
updatedByUserId (anyOf 2)	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
value	string	Required within parent	The actual value of the property at the given timestamp. It is a string.

Policy, approvals and errors

SDK function policy ID: hubspot.carts_merge. Catalog operation: carts_merge. 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.carts.write"]

Official provider source