Programmatically access currency exchange rates [closed]

Answer 1

I added Open Data table to YQL, you can use it to retrieve exchange rate data from yahoo.finance.

Try it in YQL console

Comma-separated format is preferrable over "where pair in ('EURUSD','GBPUSD')" but anyway, you can use both and even intermix them.

Answer 2

This is working for me .

A currency exchange rate API : http://currency-api.appspot.com/

Answer 3

coinnill.com has a sort-of web-service.

http://coinmill.com/rss/AUD_USD.xml

will give you the AUD --> USD rate for example. You'll just need to parse the XML that comes back.

Answer 4

I recently implemented the same thing, but using Google's API. The query URL looks like this:

http://www.google.com/ig/calculator?hl=en&q=1GBP=?USD

It takes 3 parameters. The first parameter is the amount, followed by the ISO 4217 currency code you're converting from, an equals sign and a question mark, and the currency code you're converting to. You can find a list of codes that Google supports here. The response to the query will look like this:

{lhs: "1 British pound",rhs: "1.6132 U.S. dollars",error: "",icc: true}

This is pretty self-explanatory, so I won't go into details here. This is how I handled the query response:

function convert_currency($amount, $from_code, $to_code){
    ini_set('max_execution_time', 60);
    $temp = 'http://www.google.com/ig/calculator?hl=en&q=' . $amount . $from_code . '=?' . $to_code;

    $response = file_get_contents($temp);
    $result_string = explode('"', $response);

    $final_result = $result_string['3'];

    $float_result = preg_replace("/[^0-9\.]/", '', $full_result);

    return $float_result;
}

I'm sure it's far from the most elegant way to do this, but I'm pretty new to PHP. Hope it helps!

Answer 5

Try this RESTful (I'm not sure if this is really a REST, since i got this originally from a SOAP, I just tried to access it using HTTP GET)

Answer 6

You can get currency conversions in a simple format from yahoo:

For example, to convert from GBP to EUR: http://download.finance.yahoo.com/d/quotes.csv?s=GBPEUR=X&f=sl1d1t1ba&e=.csv