v1

latestOpenAPI 3.0.0Proprietary2026-07-26130282259.8 KB
contacts

Update Contact Custom Field

Sets a value for the specified custom field in the contact. If the custom field type is Text, the maximum lenght of the text is 500 characters. Any text beyond that limit will be truncated.

This endpoint is rate limited. Use the RateLimit-* response headers to check current limits and remaining quota.

put/contacts/{contactId}/custom-fields/{customFieldId}

Path parameters

contactIdstring uuid required

The contact's unique identifier

customFieldIdstring uuid required

The ID of the custom field

Request body

fieldType'Text' | 'Number' | 'Date' | 'Boolean'

Specifies the data type (text, number, date, boolean) for the custom field.

valuesstring[]

Example request

{
  "values": [
    "1",
    "2",
    "3"
  ]
}

Response

No Content