...
How to collect all messages at and keep the sequence:
The actual messages have to be collected via individual API calls against the different "retrive" APIs. In order to streamline that process a "master"-retrieve API (/api/v2/availableMessages) is provided that returns a list of individual "retrieve" APIs that contain waiting messages for the retrieving registry. The availableMessages API will list per "retrive" API the sequence numbers of the waiting messages in an array.
....
Options:
to allow external registries to access those messages there are several options:
...