Create a Custom Field

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Creates a new custom field for your account.

Headers
  • Content-Type
    Type: string

    application/json

Body·
application/json
  • custom_field
    Type: object
    required
Responses
  • application/json
  • application/json
  • application/json
  • application/json
Request Example for post/custom_fields
curl /custom_fields \
  --request POST \
  --header 'Content-Type: application/json' \
  --header 'X-Auth-Token: YOUR_SECRET_TOKEN' \
  --data '{
  "custom_field": {
    "key": "",
    "label": "",
    "object_ref": "campaign",
    "active": true
  }
}'

{
  "custom_field": {
    "id": 1,
    "key": "string",
    "label": "string",
    "object_ref": "string",
    "active": true,
    "created_at": "2026-06-19T19:21:28.124Z",
    "updated_at": "2026-06-19T19:21:28.124Z"
  }
}

Example response