curl https://api.tracklysms.com/api/v2/accounts/children/1042/api-keys \
  -H "X-Api-Key: trk_your_parent_key"

{
  "apiKeys": [
    {
      "id": "66b0f7c84a1d4b2e9c3a1f2e",
      "accountId": 1042,
      "name": "prod",
      "key": "trk_ab12****",
      "keyPrefix": "trk_ab12",
      "status": "active",
      "permissions": ["api.full"],
      "sandbox": false,
      "createdAt": "2026-07-26T14:05:00.000000",
      "lastUsedAt": "2026-07-26T15:10:00.000000"
    }
  ]
}