curl --request GET \
  --url https://api.gputrader.io/v1/environments/listings \
  --header 'X-API-Key: <api-key>'

{
  "listings": [
    {
      "envId": "<string>",
      "availabilityWindows": {},
      "pricing": {},
      "selectedGPUs": 123,
      "totalGPUs": 123,
      "availableGPUs": 123,
      "totalCPUs": 123,
      "totalRAM": 123,
      "totalStorage": 123,
      "gpuName": "<string>",
      "gpuInterconnect": "<string>",
      "gpuVRAM": 123,
      "gpuCUDA": "<string>",
      "gpuBandwidth": 123,
      "location": "<string>",
      "networkUploadSpeed": 123,
      "networkDownloadSpeed": 123,
      "type": {},
      "activeRentalIds": {},
      "isListed": true,
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "lastEvaluatedKey": "<string>"
}