Using the Transaction Search and Details API, you can search for and view the details of any transaction. This REST API replaces the query servlet (also called “programmatic download”) used with Classic Business Center. The servlet was used to retrieve the On-Demand Single Transaction Report.
The response payload for the REST APIs is JSON. For information about how the JSON fields map to the XML query servlet fields, see Field Names in JSON Response
For information about which servies can be returned by the Transaction Search and Details APIs, see Services Returned by the API