curl --get 'https://api.mindosoftware.com/api/v1/external/contacts/' \
  --data-urlencode 'phone=+5491112345678' \
  -H 'X-API-Key: mindo_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

{
  "found": true,
  "contact": {
    "id": 123,
    "full_name": "Ana Pérez",
    "email": "ana@example.com",
    "phone": "+5491112345678",
    "source": "api",
    "source_detail": null,
    "profile_picture": "https://cdn.example.com/ana.jpg",
    "custom_fields": [
      {
        "id": 45,
        "key": "estado",
        "name": "Estado",
        "field_type": "selector",
        "options": ["nuevo", "calificado"],
        "required": false,
        "value": ["calificado"],
        "version": 2,
        "expires_at": null
      }
    ]
  }
}

{
  "found": false,
  "contact": null
}