---
title: "Merge two contacts"
method: POST
path: "/crm/objects/2026-03/contacts/merge"
tags: ["Advanced"]
---

# Merge two contacts

`POST /crm/objects/2026-03/contacts/merge`

## Request

- Base URL: `https://api.hubapi.com`
- URL: `https://api.hubapi.com/crm/objects/2026-03/contacts/merge`
- Auth: none required

Merge two contact records. Learn more about [merging records](https://knowledge.hubspot.com/records/merge-records).

## Request body

- PublicMergeInput: Input data for merging two records.
  - `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 `200`

successful operation

- SimplePublicObject: A simple public object.
  - `archived` boolean, required: Whether the object is archived.
  - `archivedAt` string, date-time: The timestamp when the object was archived, in ISO 8601 format.
  - `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.
  - `objectWriteTraceId` string: An identifier used to trace the write request for the object. Set a unique ID for each write operation; it is returned with any errors so you can identify which request encountered which error.
  - `properties` object, required: Key-value pairs representing the properties of the object.
  - `propertiesWithHistory` object: Key-value pairs representing the properties of the object along with their history, each with a timestamp and source information.
  - `updatedAt` string, date-time, required: The timestamp when the object was last updated, in ISO 8601 format.
  - `url` string: The URL associated with the object.
  - `warnings` PublicObjectWarning[]
    - `category` string, required: The classification of the warning, indicating the type or nature of the issue.
    - `context` object, required: Additional information or metadata about the warning, providing context for understanding the issue.
    - `message` string, required: The text of the warning message, providing information about the issue or alert.

## Other responses

- `default`: An error occurred.

## Changes

- **2026-09-22** (2026-03) `27aa774222cc`: 1 info
  - the endpoint scheme security `oauth2` was removed from the API
- **2026-06-23** (2026-03) `968d92765cf8`: 1 info
  - added the optional property `warnings` to the response with the `200` status
- **2026-04-15** (2026-03) `2cc6f4ba304e`: 5 info
  - the endpoint scheme security `app_cookie` was removed from the API
  - the endpoint scheme security `hapikey` was removed from the API
  - the endpoint scheme security `internal_cookie` was removed from the API
  - the endpoint scheme security `private_apps` was removed from the API
  - …1 more

[Operation history](https://skmtc.dev/hubspot/apis/crm-contacts/changes/crm/objects/2026-03/contacts/merge/post.md)

---

[API](https://skmtc.dev/hubspot/apis/crm-contacts.md) - [All operations](https://skmtc.dev/hubspot/apis/crm-contacts/llms.txt) - [OpenAPI document](https://skmtc.dev/hubspot/apis/crm-contacts/revisions/b74503b90b68?raw)