Smart Access Gateway APIs are listed here.

API Description
ModifySmartAccessGateway Modify the configurations of a Smart Access Gateway instance.
DescribeSmartAccessGateways Query created Smart Access Gateway instances.
BindSmartAccessGateway Bind a Smart Access Gateway instance to a CCN instance.
UnbindSmartAccessGateway Unbind a Smart Access Gateway instance from a CCN instance.
DescribeSmartAccessGatewayVersions Query the software version of a Smart Access Gateway instance.
GetSmartAccessGatewayUseLimit Query the number of Smart Access Gateway instances that can be purchased.
UpdateSmartAccessGatewayVersion Upgrade the software version of a Smart Access Gateway.
CreateCloudConnectNetwork Create a CCN instance.
DescribeCloudConnectNetworks Query created CCN instances.
ModifyCloudConnectNetwork Modify the name and description of a CCN instance.
DeleteCloudConnectNetwork Delete a CCN instance.
GetCloudConnectNetworkUseLimit Query the number of CCN instances that the account can create in the area.
Describeregions Query available areas.