curl --request GET \
  --url https://testnet.derivadex.io/exchange/api/v1/mark_prices

{
  "nextGlobalOrdinal": 123,
  "value": [
    {
      "globalOrdinal": 123,
      "epochId": 123,
      "symbol": "<string>",
      "price": "<string>",
      "fundingRate": "<string>",
      "createdAt": "2023-11-07T05:31:56Z"
    }
  ],
  "success": true,
  "timestamp": 123
}