I'd like to use the api of https://www.alphavantage.co/ which is pretty well documented, in terms of avaliable functions (but not parameters).
However, in order to get an API response, one needs to enter a symbol which corresponds to the traded instrument, in this case an ETF. The problem is, I don't know which symbol corresponds to the instruments I am interested in.
I've found some posts concerning symbols for Stocks, indices and a general discussion on symbol search. Did anyone manage to pull ETF data from alpha vantage, and if yes, which naming conventions for etfs do apply?
Edit/TL;DR: I'm looking for some resource which tells me which symbol I should use given an instrument (identified by ISIN/WKN).