curl --request GET \
  --url https://api.gravixlayer.com/v1/agents/sandboxes \
  --header 'Authorization: Bearer <token>'

{
  "sandboxes": [
    {
      "sandbox_id": "<string>",
      "template": "<string>",
      "status": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "expires_at": "2023-11-07T05:31:56Z"
    }
  ]
}