When you sign-up to use Nexus Transmit, you will be provided with credentials to receive Nexus Transmit messages. If you already have an integration site to use Nexus Sync, then Nexus Transmit can be enabled for this site as well.
As Nexus Transmit is an AMQP interface, there is not a RESTful Web Service or a Swagger interface to host detailed documentation. This help site is the best resource for Nexus Transmit information.
When Nexus Transmit is enabled for your organization, a private, secure message queue will be created to store and deliver messages specific to your activities within Nexus.
Please contact your SCRAM Account Manager to get Nexus Sync enabled for your organization.