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