Any free stock market data API?

[Amorphorious]

On Thursday, 4 January 2018 at 23:04:44 UTC, Amorphorious wrote:
> Most are in other languages:
>
> https://www.alphavantage.co/
>
> https://iextrading.com/
>
> are two free ones.
>
> I'm just hoping for a more D'ish solution.


http://www.quantmod.com/

I'm wondering if I can use something like alphavantage and this 
package and integrate it between D and R. Have R/qauntmod do all 
the statistical work to avoid rewriting it all but easily 
coordinate all this from D.

Or maybe there is a better way?