Hello @SteveP931,
If you check our documentation for contacts when doing a GET, POST, or PUT you will notice that in the sections for structure they all mention the custom_fields and how they need to be formatted.
https://developer.constantcontact.com/docs/contacts-api/contacts-collection.html?method=GET
Here is what the documentation states.
- custom_fields
array
You can create up to 15 custom fields for a contact. The API currently only supports the custom field format described here. If the account uses the new contact management system, it is possible to create custom fields with varying formats. The API ignores custom fields not using the format below.
label
string (50)
This read-only field displays the custom_field name entered using the product GUI, the value is displayed only if it matches the custom_field_n (n=1-15) format.
name
string
You must name each custom field custom_field_1, custom_field_2,...custom_field_15. Only custom fields with values are shown in response to a GET call.
value
string (50)
Content of the custom field
I can completely understand the frustration this can cause. Please know this has been changed with our v3 API which is under development and will be released soon. I do not yet have a release date though.
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