Redirects to a download URL for the Transaction's message content. Most HTTP clients follow the 302 redirect automatically, so a plain GET returns the content directly.

What downloads depends on how the Transaction is backed: Relationships that trade JSON return the JSON document, while X12 and EDIFACT Relationships return the EDI file. As the sender you read back the content you posted; as the receiver you get the message as it is delivered to you.

The download URL is short-lived — it expires 5 minutes after it is issued. Follow it right away rather than storing it, and request this endpoint again whenever you need a fresh one.