Instagram scheduling guide: post types, API rules and timing

Every major Instagram post type schedules and auto-publishes: feed images, carousels of up to 10 mixed image/video items, Reels, and Stories. The one thing Instagram will not accept, by its own API design, is a text-only post — every post needs at least one image or video attached, which is checked before a post is even queued.

Two requirements matter, and they’re often confused with each other. First: the account has to be a Professional account — Business or Creator; personal accounts cannot publish through any API path. Second: you sign in through Meta’s login with Instagram or Facebook, choose the business portfolio and pick the Instagram account; SkedCast requests Instagram permissions only and never a Facebook Page permission.

Composing Instagram posts one at a time doesn’t scale past a handful of posts a week. A content calendar — built from a free CSV, Google Sheets, Excel or Notion template — maps directly into bulk import, so a finished plan becomes scheduled posts in one pass instead of a second manual-entry step. Because Instagram’s feed is a visual grid, the grid planner lets you preview how planned images will look together before anything is scheduled.

General benchmarks (weekday late mornings, Reels in the early evening) are only a starting point. Once an account has published enough through SkedCast to build a real history, its best-time windows are computed from that account’s own engagement, and scheduling can target those windows directly instead of a single fixed hour.

A small, well-documented set of causes explains almost every case: revoked access (for example the app removed from the business portfolio), asynchronous video processing still running, a missing permission (the automatic first comment specifically needs one), or Instagram’s own rolling 24-hour publish cap. Each one surfaces with its own signal rather than a post silently vanishing.