XML Resonse format
Successful Responses
<response>
<query>
<method>getPopularSources</method>
<country>nl</country>
<lang>nl</lang>
<currentRate>130</currentRate>
</query>
...
</response>
Failure Responses
When an error occured, the API will return an errorCode and an errorString. See here for more details.
<response>
<error>
<errorcode>1</errorcode>
<errorstring>Invalid API key</errorstring>
</error>
</response>