See the API's various operations for details on their request parameters and response data.

OperationMethodEndpoint
Contracts
List contractsGET/contracts/​identifiers
List products per contractGET/contracts/​{contractId}/products/summaries
Reporting groups
List CP code reporting groupsGET/reportingGroups/
List CP code reporting group IDsGET/reportingGroups/identifiers​
List products per reporting groupGET/reportingGroups/{reportingGroupId}/products/summaries​