It is not available today as public API. However, we are working on extending the API coverage to support various information you get in our dashboard, including portfolio history data. Please stay tuned!
The API still only returns a few data points (not the whole history) and the API documentation still says that it’s unreliable and a new version will be coming soon. This is essential to analyze portfolio performance.
I can confirm the API endpoint sometimes return inaccurate data. More often that not, it seems to be confused between cash and equity although it’s supposed to show equity.
Hi @tisav, Feather Finance is portfolio management app and a partner app of Alpaca. We model your portfolio from all its activities and let you analyze your profit / loss on any subset of your portfolio. The P/L we calculate is always consistent with the set of activities in your portfolio. We also have an API with a /portfolio/history endpoint.