Create a story (single or multi-frame)

Creates a story on a story-capable page (Instagram and Facebook). Provide media as a single URL for a one-frame story, or as an array of URLs (max 20) to create a multi-frame story group (one frame per URL, in order). When a multi-frame story is created the response also includes posts (every frame, in order) and group (the shared story-group id and its post ids). GIFs are not supported. Media is processed asynchronously, so the media URL is typically null in this response while the upload is still processing — use mediaId with GET /media/{id} (or re-fetch the story) to poll mediaStatus until it is success, at which point the URL becomes available. The notify flag controls whether workspace members receive a post-added notification (email/in-app push); set it to false to suppress those notifications. Internal activity feed entries are always recorded. notify is not an approval request — use POST /posts/{id}/request-approval to notify approvers.