Pagination
Pagination capabilities are supported by default on all GET operations that have a response payload of XV1*ListInfo (for example, XV1ConversationListInfo), unless otherwise specified.
You can use offset and count in the query argument, where the default values are 0 and 20 respectively. For example:
https://<host:[<port>]/osn/social/api/conversations/<conversationID>/messages?offset=0&count=25
This request gets the first 25 messages, returning them with the newest message first. You can send additional requests to get incrementally older posts in the Conversation.