FaceSplit does not support the generic Splits.io Exchange Format, so it cannot output runs in the standard format.
However, Splits.io has limited support for reading FaceSplit's proprietary format. These files use the extension
FaceSplit doesn't support the Splits.io Exchange Format, so it can't read most runs from Splits.io.
You cannot request arbitrary runs from the API in FaceSplit format. Runs originally uploaded in FaceSplit format can be fetched in that same way using the header:
Runs returned in FaceSplit format include the header: