Retrieve a send

One dispatch, by the identifier a send.completed or send.failed event carried, or the one a retry reported back. Needs sending: read.

This is the operation those events point at. An identifier arrives on a webhook and this reads the run behind it, so a consumer does not have to have kept the payload to be able to ask again.

Expanding article inlines an Article, which is content rather than sending, so it also needs content: read on this newsletter. A credential that holds sending: read without it is refused with 403 insufficient_scope, param set to expand, and allowed_values listing what it may expand instead (newsletter). Unexpanded, article is a reference and needs nothing more. Accepted paths are article and newsletter.