No access fees, no rate limits, No ugly XML - just 自由, hourly updated exchange rates in JSON format.
这并不是“完全”免费的。新的许可规定允许每月最多1000次点击,然后你需要付费。如果您想使用单一货币转换器(基本功能) ,还需要付费。
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 给你. The response to the query will look like this:
{lhs: "1 British pound",rhs: "1.6132 U.S. dollars",error: "",icc: true}