ApiContactImport
Bulk creates, or bulk updates, contacts with merge options. The ID of returned object can be used to query import progress.
Import format can either be CSV or Excel. Must include one column called "Email". Passing a valid "mergeOption" parameter is compulsory. Any other columns will attempt to map to your custom data fields.
post/v2/address-books/{addressBookId}/contacts/import/with-merge-option/{mergeOption}
Path parameters
addressBookIdinteger required
mergeOption'Overwrite' | 'OnlyOverwriteIfNotEmpty' | 'OnlyOverwriteIfContactDataNotPopulated' | 'NotAvailableInThisVersion' required