v1

latestOpenAPI 3.0.02026-07-244771176.5 KB

Contacts & Lists

Add Field to List

Add or update custom fields on an existing list

post/add-field-to-list.json

Response

Successful response

custom_nstring[]

Custom field names created.

idinteger

ID of the list added to.

Example response

{
  "custom_n": [
    "email",
    "phone"
  ],
  "id": 12345,
  "error": {
    "code": "MISSING_PARAM",
    "header": 400,
    "description": "Field parameter is missing (e.g., field_n)"
  }
}