Request: It has been suggested to add a dedicated tag with a unix timestamp in the XML return for API requests. This will make it easier to track time from when the thumbnail was generated and makes it simpler to code automated refreshes based on x-number of days since the last time that particular thumbnail was generated.
Status: Completed
After a brief study of implementation, I see that this is an easy and minor addition. It does not affect any other pieces of code, so I have gone ahead and implemented this.
To extract this unix timestamp from the API's XML return, you would pull the timestamp from between the StatusCode tag that is between the new ResponseTimestamp tag.
Example XML:
<stw:ResponseTimestamp> <stw:StatusCode>0123456789</stw:StatusCode> </stw:ResponseTimestamp>
The feature is working great! And it was implemented more than ASAP 
