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How to fix Finance::Quote to pull quotes in GnuCash
The Yahoo Finance API is no longer available, so Finance::Quote needs to point at something else.  Recent versions of Finance::Quote can use AlphaVantage as a replacement for the Yahoo Finance API, but individual users need to acquire and input an AlphaVantage API key. Pretty decent documentation for how to this is available at the GnuCash wiki. Once you've followed the directions on the wiki and set the API key, you still need to tell each individual security to use AlphaVantage rather than Yahoo Finance: As a warning, I've been having intermittent trouble with AlphaVantage.  From the GnuCash wiki:  Be patient. Alphavantage does not have the resources that Yahoo! did and it is common for quote requests to time out, which GnuCash will present as "unknown error". I've certainly been experiencing those errors, though not always.