Site: USPSUnable to do anything on the site. Stamps dot com is also affected and I can not ship anything on line have to go to the po!! NOT HAPPY!! OKC AREA Add new comment Comments Same here. Unable to track anything so you're not the only one. reply They just changed their rates and online API's today, so that's most likely the cause of the issues we're seeing. reply Add new comment Your name * E-mail * The content of this field is kept private and will not be shown publicly. Comment * Notify me when new comments are posted iNmjHw Enter the code above * Enter the code without spaces.