Using the POST method, you can create a new person record. Note that this call does not subscribe this person to any subscription list. To subscribe a person to a list, use the Add a participant API call.
Adding a person and subscribing them to a list
Using the Add a participant API call, you can both create a person record and subscribe that person to a list with a single API call.
Note that you do not need to add a person record before subscribing a person to a list.
Request
Either the mobile_phone or external_person_id must be provided to create the unique record, but you can also include any custom field info you’d like.
The fields that cannot be updated are the person_id, timezone_sourced, created_at, and updated_at fields. These are generated by the system. Any values included will be ignored.