As of February 2010, the lowest supported Trading API version is 577. (Version 577 was released in August 2008.) Objects that were deprecated prior to version 577 no longer work, or may stop working at any time without notice. We recommend that you remove deprecated objects from your application...

By popular request, we have increased the message size in four Trading API calls. Creating messages AddMemberMessageRTQ AddMemberMessageAAQToPartner You can now create messages up to 4000 characters long using the MemberMessage.Body field. Retrieving messages GetMemberMessages For versions 653 or...