We have deprecated POST /v2/people/{:person_id}/contacted endpoint which will update the EP contacted at details. This was an old endpoint and this is now part of EP Followup .

The alternate for this endpoint:

Endpoint: updatePerson
Param: follow_up_id

The followup options can be get form the following endpoint:
query{
  allConstants(type_ids: ["ep_manager_follow_ups"]){
    id
    name
  }
}