Returns a single item from your library with full metadata.
itm_r9f3a.markdown.When markdown is included, the response adds a markdown field with the parsed article body. These requests count against the content rate limit (20/min)."item".inbox, queue, or archive.processing, completed, or failed. See Save Item for details.article, video, podcast, pdf, tweet, newsletter.null for non-text content.0.0 to 1.0.?include=markdown is set. null if the item hasn’t been processed yet.