Prices returned via API

Hello,

The 0.0 USD you are seeing are related to Reserved Instances purchases with an All Upfront purchase option: Those are under the "reserved" termType.

"X.Y" : {
          "offerTermCode" : "Y",
          "sku" : "X",
          "effectiveDate" : "2022-07-01T00:00:00Z",
          "priceDimensions" : {
            "X.Y.2TG2D8R56U" : {
              "rateCode" : "X.Y.Z",
              "description" : "Upfront Fee",
              "unit" : "Quantity",
              "pricePerUnit" : {
                "USD" : "1544" <---- The Upfront free
              },
              "appliesTo" : [ ]
            },
            "X.Y.W" : {
              "rateCode" : "x.y.z",
              "description" : "USD 0.0 per Linux/UNIX (Amazon VPC), m6i.large **reserved instance** applied",
              "beginRange" : "0",
              "endRange" : "Inf",
              "unit" : "Hrs",
              "pricePerUnit" : {
                "USD" : "0.0000000000" <---- $0.0 due to the PurchaseOption
              },
              "appliesTo" : [ ]
            }
          },
          "termAttributes" : {
            "LeaseContractLength" : "3yr",
            "OfferingClass" : "convertible",
            "PurchaseOption" : "All Upfront"  <---- PurchaseOption is specified here
          }
        },

Generally, you are charged for the reservations and not the instances.

Other $0.0 could also be related to dedicated hosts for which you pay for the host and not the instance. For the below, the m6i.12xlarge is paid for by the host purchase instead.

$0.00 per RHEL with HA and SQL Standard m6i.12xlarge Dedicated Host Instance hour

Some information about the model can be found here: https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/reading-an-offer.html#offer-term-type

Regards,

Jon