Bargain Hunter

Programming Snapshot – Stock Quote API

Article from Issue 210/2018
Author(s):

Financial wizard Mike Schilli is annoyed that some web services have discontinued serving up real-time stock market data. To keep an eye on his investment dollars, Mike taps into a little known interface for stock prices.

For users of stock-quote-serving APIs, the fruit is currently hanging higher. First, Google discontinued its web service [1] for real-time stock market data (Figure 1); then, Yahoo followed suit and pulled the plug. With the end of their undocumented but widely used share price interface in CSV format [2], Yahoo, perhaps unknowingly, also pulled the rug from under a number of open source projects, such as the Perl Yahoo::Finance CPAN module and the Python yahoo-finance package. A few open source portfolio-tracking applications using these popular packages were dragged into the abyss along with them.

Figure 1: Google's financial site for portfolio tracking has seen better days.

On the GitHub sites of these projects, the Issues tabs are now overflowing with comments, there's quite a bit of wailing and gnashing of teeth from users, and much wringing of hands of those who hope to find a replacement for the vanished free real-time (or at least time-delayed) stock market price data source.

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