Llanfair 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 Llanfair's proprietary format. These files use the extension
Llanfair 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 Llanfair format. Runs originally uploaded in Llanfair format can be fetched in that same way using the header:
Runs returned in Llanfair format include the header: