I am looking for a free S&P 500 data feed, preferably one with a REST API. It appears that Yahoo Finance & Google Finance have discontinued their feeds. For example, http://download.finance.yahoo.com/d/quotes.csv?s=GOOG+AAPL&f=snl1 returns, "It has come to our attention that this service is being used in violation of the Yahoo Terms of Service..." Does anyone know of a free S&P 500 data feed? Delayed quotes are fine.
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