curl -X GET 'https://api.nuntly.com/inboxes' \
  -H 'Authorization: Bearer apk_xxx'

{
  "data": [
    {
      "id": "<string>",
      "createdAt": "<string>",
      "domainId": "<string>",
      "domainName": "<string>",
      "address": "<string>",
      "name": "<string>",
      "namespaceId": "<string>",
      "namespaceName": "<string>",
      "agentId": "<string>",
      "updatedAt": "<string>"
    }
  ],
  "nextCursor": "<string>"
}