Portfolio History Endpoint

I see that when logged in the historical value chart on the Overview page utilizes an internal API for showing portfolio history.

That URL looks like: https://app.alpaca.markets/internal/accounts/{string}/portfolio/history?period=intraday

Is this endpoint available for use?

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!