etf list (JSON): https://etfs.sparcero.com/api/beta/files/etf-list.json
etf list (JSONL): https://etfs.sparcero.com/api/beta/files/etf-list.jsonl
etf holdings (JSON): https://etfs.sparcero.com/api/beta/cgi/holdings/?isin=XXXXXX
etf holdings (JSON): https://etfs.sparcero.com/api/beta/cgi/holdings/?ticker=XXXXXX
etf distributions (JSON): https://etfs.sparcero.com/api/beta/cgi/distributions/?isin=XXXXXX
etf distributions (JSON): https://etfs.sparcero.com/api/beta/cgi/distributions/?ticker=XXXXXX
etf outstanding shares (JSON): https://etfs.sparcero.com/api/beta/cgi/shares-outstandings/?isin=XXXXXX
etf outstanding shares (JSON): https://etfs.sparcero.com/api/beta/cgi/shares-outstanding/?ticker=XXXXXX
etf fees (JSON): https://etfs.sparcero.com/api/beta/cgi/fees/?isin=XXXXXX
etf fees (JSON): https://etfs.sparcero.com/api/beta/cgi/fees/?ticker=XXXXXX
etf premium/discounts (JSON): https://etfs.sparcero.com/api/beta/cgi/premium-discounts/?isin=XXXXXX
etf premium/discounts (JSON): https://etfs.sparcero.com/api/beta/cgi/premium-discounts/?ticker=XXXXXX