Headers: add Authorization = Bearer followed by the Text from step 3
Request Body: Form → add field, type File, name files, value = Shortcut Input
(Optional) Add Show Notification with Contents of URL so you see "created: N".
Done. Now from any app: Share → Drop to LongMem. It lands in your drop collection, searchable in seconds.
Why a manual build and not one tap? A one-tap shortcut has to be signed and tested on a real device first — coming soon. This recipe takes ~2 minutes and works today. Want a different collection? Change /collections/drop/drop to /collections/<name>/drop.