This service allows export of data for transactional emails. It is separate from the other Data Export services in that it does not rely on a data_export node. Instead the reports are generated and immediately using the #filter provided.
There are a variety of reports available, but only one is fully described below, as they all use the same format of parameters and return values.
Each method generates a CSV file which can then be downloaded. The columns in the CSV will be similar, but some additional columns will be available for particular report types, such as click-through URL.