curl --request GET \
  --url https://api.coinbase.com/api/v3/brokerage/best_bid_ask \
  --header 'Authorization: Bearer <token>'

{
  "pricebooks": [
    {
      "product_id": "BTC-USD",
      "bids": [
        {
          "price": "<string>",
          "size": "<string>"
        }
      ],
      "asks": [
        {
          "price": "<string>",
          "size": "<string>"
        }
      ],
      "time": "<string>"
    }
  ]
}