HubSpot: Merge two companies

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Operation hubspot.companies_merge_companies

Provider route: POST /crm/objects/2026-09/companies/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["companies"]["mergeCompanies"]>[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.companies.mergeCompanies(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.companies.merge_companies(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 two companies — request body — body

Referenced models: Merge two companies — 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 company — response body

Referenced models: Create a company — response body

Schemas

Merge two companies — request body — body

Field	Type	Presence	Description and constraints
$	object	Root	Input data for merging two records.
objectIdToMerge	string	Required within parent	The ID of the company to merge into the primary.
primaryObjectId	string	Required within parent	The ID of the primary company, which the other will merge into.

Create a company — response body

Field	Type	Presence	Description and constraints
$	object	Root	A simple public object.
archived	boolean	Required within parent	A boolean indicating whether the object is 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, represented as a string.
objectWriteTraceId	string	Optional	A string representing the trace ID for write operations on this object.
properties	object	Required within parent	A map of property names to their values, where each value is a string. Additional keys: see wildcard field
properties.*	string	Additional keys
propertiesWithHistory	object	Optional	A map of property names to their historical values, where each value is an array of objects containing the value and timestamp. Additional keys: see wildcard field
propertiesWithHistory.*	array	Additional keys
propertiesWithHistory.*[]	Model	Each item	Expand Create a company — 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 containing the URL of the object.
warnings	array	Optional	An array of warning objects, each containing details about potential issues with the object.
warnings[]	Model	Each item	Expand Create a company — response body — warnings item

Referenced models: Create a company — response body — warnings item, Create a company — response body — properties With History value item

Create a company — 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 indicating the category of the warning.
context	object	Required within parent	An object providing additional context about 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.

Create a company — response body — properties With History value item

Field	Type	Presence	Description and constraints
$	object	Root	Property model that includes timestamp.
sourceId	string	Optional	The identifier of the source from which the value was obtained. It is a string.
sourceLabel	string	Optional	A label providing additional context about the source. It is a string.
sourceType	string	Required within parent	The type of source from which the value was obtained. It is a string and 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	The ID of the user who last updated the value. It is an integer. Format: int32
updatedByUserId (anyOf 2)	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
value	string	Required within parent	The value associated with the timestamp. It is a string.

Policy, approvals and errors

SDK function policy ID: hubspot.companies_merge_companies. Catalog operation: companies_merge_companies. 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.companies.write"]

Official provider source