The Accept header controls the output format. Set it to application/vnd.openxmlformats-officedocument.spreadsheetml.sheet to receive Excel. Always keep Content-Type as application/json. If you must separate execution from download, first execute via POST with Accept: application/json, then retrieve the Excel file via GET.
This endpoint isn’t designed for concurrent export of large formatted reports. To avoid impact on overall system load, don’t run more than one large report export at a time. For report size, row, and other API limits, see Requirements and Limitations.
Note
To execute a report and download it in a single request, send a POST: