List custom fields
A custom field allows you to collect subscriber information beyond the standard fields of first name and email address. An example would be a custom field called last name so you can get the full names of your subscribers.
You create a custom field, and then you’re able to use that in your forms or emails.
Authorizations
Authenticate API requests via an API Key
Query Parameters
To fetch next page of results, use ?after=<end_cursor>
To fetch previous page of results, use ?before=<start_cursor>
Set to true to include the total_count in the response. This option can cause slow responses; if paging through results, request it only on the first page and reuse the value for subsequent pages.
Number of results per page. Default 500, maximum 1000.