curl --request GET \
  --url https://api.sandbox.monite.com/v1/counterparts/{counterpart_id}/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'x-monite-entity-id: <x-monite-entity-id>' \
  --header 'x-monite-version: <x-monite-version>'

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "address": {
        "city": "Berlin",
        "country": "DE",
        "line1": "Flughafenstrasse 52",
        "postal_code": "10115",
        "line2": "<string>",
        "state": "<string>"
      },
      "counterpart_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "first_name": "Mary",
      "is_default": true,
      "last_name": "O'Brien",
      "email": "contact@example.org",
      "phone": "5551235476",
      "title": "Ms."
    }
  ]
}