curl --request GET \
  --url https://api.cartesia.ai/agents/calls/batches \
  --header 'Authorization: Bearer <token>' \
  --header 'Cartesia-Version: <cartesia-version>'

{
  "data": [
    {
      "id": "<string>",
      "name": "<string>",
      "agent_id": "<string>",
      "from_number_id": "<string>",
      "target_concurrency_limit": 123,
      "status": "<string>",
      "total_calls_scheduled": 123,
      "total_calls_dispatched": 123,
      "total_calls_finished": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "last_updated_at": "2023-11-07T05:31:56Z",
      "scheduled_at": "2023-11-07T05:31:56Z",
      "recipients": [
        {
          "id": "<string>",
          "to_number": "<string>",
          "status": "<string>",
          "created_at": "2023-11-07T05:31:56Z",
          "agent_call_id": "<string>",
          "error_message": "<string>",
          "metadata": {}
        }
      ]
    }
  ],
  "has_more": true,
  "next_page": "<string>"
}