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POST
/
crm
/
v3
/
objects
/
contacts
/
merge
Merge two contacts
curl --request POST \
  --url https://api.hubapi.com/crm/v3/objects/contacts/merge \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "objectIdToMerge": "<string>",
  "primaryObjectId": "<string>"
}
'
{
  "archived": false,
  "createdAt": "2019-10-30T03:30:17.883Z",
  "id": "512",
  "properties": {
    "property_checkbox": "false",
    "property_date": "1572480000000",
    "property_dropdown": "choice_b",
    "property_multiple_checkboxes": "chocolate;strawberry",
    "property_number": "17",
    "property_radio": "option_1",
    "property_string": "value"
  },
  "updatedAt": "2019-12-07T16:50:06.678Z"
}

Supported products

Requires one of the following products or higher.
Marketing HubMarketing Hub -Free
Sales HubSales Hub -Free
Service HubService Hub -Free
Content HubContent Hub -Free
Data HubData Hub -Free

Authorizations

​
Authorization
string
header
required

The access token received from the authorization server in the OAuth 2.0 flow.

Body

application/json
​
objectIdToMerge
string
required

The object ID of the record that the merge will not set as the current value after the merge.

​
primaryObjectId
string
required

The object ID of the record that the merge will generally set as the current value after the merge.

Response

successful operation

A simple public object.

​
archived
boolean
required

Whether the object is archived.

​
createdAt
string<date-time>
required

The timestamp when the object was created, in ISO 8601 format.

​
id
string
required

The unique ID of the object.

​
properties
object
required

Key-value pairs representing the properties of the object.

​
updatedAt
string<date-time>
required

The timestamp when the object was last updated, in ISO 8601 format.

​
archivedAt
string<date-time>

The timestamp when the object was archived, in ISO 8601 format.

​
objectWriteTraceId
string
​
propertiesWithHistory
object

Key-value pairs representing the properties of the object along with their history.

​
url
string
Last modified on December 16, 2025