curl --request GET \
  --url https://api.agg.market/orderbooks \
  --header 'x-app-id: <api-key>'

{
  "data": [
    {
      "marketId": "<string>",
      "venueOrderbooks": {},
      "matchedMarkets": [
        {
          "venue": "<string>",
          "marketId": "<string>"
        }
      ]
    }
  ]
}