Recently, custom fields were added for some APIs. We want to add custom fields support to our integration with hubspot but we are getting permissions error. We currently are only using the free versions of Hubspot CRM and a free version of Hubspot Marketing.
In the documentation there is nothing that says what level you need to pay for in order to be able to use custom fields. Are custom fields support only included in priced packages? I realize this is sort-of a sales question but I have not had much luck going through the normal channels. What is the minimum package that supports custom fields for the APIs?