For Lightspeed eCom: see SQL/Power BI connector for Lightspeed eCom (C-series).
For Lightspeed Restaurant K-series: see SQL/Power BI connector for Lightspeed Restaurant K-series
For Lightspeed Restaurant L-series: see SQL/Power BI connector for Lightspeed Restaurant L-series
No links for Lightspeed R-Series and O-Series.
Documentation available at:
https://api-docs.upserve.com/bc/
User name/password based. Functionality similar to Horeko (Master data on Horeko and over 75 other platforms, 180 days free).