Update a contact

PATCH/api/v1/contacts/{id}

PATCH /contacts/{id}

curl -X PATCH 'https://www.unitpost.com/api/v1/contacts/con_123' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{
    "unsubscribed": true
  }'

Response · 200

{
  "object": "contact",
  "id": "id_123",
  "email": "customer@example.com",
  "first_name": "string",
  "last_name": "string",
  "unsubscribed": false,
  "unsubscribed_at": "2026-01-01T00:00:00.000Z",
  "unsubscribe_reason": "USER",
  "custom_fields": {},
  "created_at": "2026-01-01T00:00:00.000Z",
  "updated_at": "2026-01-01T00:00:00.000Z"
}

Update a contact's standard or custom field values. Only the fields you send are changed; omitted fields are left as-is. The {id} accepts a contact id or email. To manage a contact's subscription preferences instead, use Set a contact's topic preference. Requires the contacts:write capability.

Parameters1 field

Field	Type	Description
`id`required	string · path	—

Request body4 fields

Field	Type	Description
`first_name`	object	—
`last_name`	object	—
`unsubscribed`	boolean	—
`custom_fields`	object	—

Response · 200 fields11 fields

Field	Type	Description
`object`required	string	—
`id`required	string	—
`email`required	object	—
`first_name`required	object	—
`last_name`required	object	—
`unsubscribed`required	boolean	—
`unsubscribed_at`required	object	—
`unsubscribe_reason`required	object	—
`custom_fields`required	object	—
`created_at`required	string	—
`updated_at`required	string	—

200401404422

Update a contact

Update a contact

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