To override the Content-type in your clients, use the HTTP Accept Header, append  the .xml suffix or  ?format=xml
        
        HTTP + XML
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /xml/reply/FallbackRequest HTTP/1.1 
Host: active-ewebservice.biz 
Accept: application/xml
Content-Type: application/xml
Content-Length: length
<FallbackRequest xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/AIM.WebService">
  <ApiKey>String</ApiKey>
  <AppId>String</AppId>
  <DeviceId>String</DeviceId>
  <OAuthToken>String</OAuthToken>
  <PathInfo>String</PathInfo>
</FallbackRequest>
 
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: length
<BaseResponse xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/AIM.WebService">
  <Status>
    <DomainName>String</DomainName>
    <ErrorCode>String</ErrorCode>
    <ErrorDisplayText>String</ErrorDisplayText>
    <ErrorMessage>String</ErrorMessage>
    <IpAddress>String</IpAddress>
    <Login>String</Login>
    <StatusCode>String</StatusCode>
  </Status>
</BaseResponse>