For quite some time I\'ve been using the following REST API to query Yahoo finance for current prices. It is documented in several Stack Overflow posts, e.g. Yahoo finance
Check out this excellent API Wrapper, available on NuGet: https://github.com/salmonthinlion/YahooFinanceApi
Get stock quotes
var quotes = await Yahoo.Symbol("AAPL", "GOOG").Tag(Tag.LastTradePriceOnly, Tag,ChangeAndPercentChange, Tag.DaysLow, Tag.DaysHigh).GetAsync();
var aapl = quotes["AAPL"];
var price = aapl[Tag.LastTradePriceOnly];
Get historical data for a stock
// You should be able to query data from various markets including US, HK, TW
var history = await Yahoo.GetHistoricalAsync("AAPL", new DateTime(2016, 1, 1), new DateTime(2016, 7, 1), Period.Daily);
foreach (var candle in history)
{
Console.WriteLine($"DateTime: {candle.DateTime}, Open: {candle.Open}, High: {candle.High}, Low: {candle.Low}, Close: {candle.Close}, Volume: {candle.Volume}, AdjustedClose: {candle.AdjustedClose}");
}
Get dividend history for a stock
// You should be able to query data from various markets including US, HK, TW
var dividendHistory = await Yahoo.GetHistoricalDividendsAsync("AAPL", new DateTime(2016, 1, 1), new DateTime(2016, 7, 1));
foreach (var candle in dividendHistory)
{
Console.WriteLine($"DateTime: {candle.DateTime}, Dividend: {candle.Dividend}");
}