A valid Sefaria textual Ref.

with_text is an optional parameter that determines whether or not the API response will include the text of any connected links. Defaults to 1

with_sheet_links is an optional parameter that determines whether or not the API response will include links to user generated source sheets from Sefaria. Defaults 0

Optional repeatable filter. Only include links whose API response category exactly matches this value. May be passed multiple times, e.g. ?category=Commentary&category=Midrash.

Optional multi-value category filter. Only include links whose API response category exactly matches one of the provided values. Values may be separated by commas or pipes, e.g. ?categories=Commentary,Midrash or ?categories=Commentary|Midrash.