If a scheduler ever failed to connect your Instagram, it almost certainly wasn't the tool — it was one of Meta's three requirements not being met. They apply to every third-party app equally:
- A professional (Business) Instagram account — personal profiles cannot be published to via the API, full stop.
- A Facebook Page linked to that Instagram account — the API authenticates through the Page, so no Page means no connection.
- You must be an admin of that Page, so you can grant the tool permission during Facebook login.
Step 1: switch Instagram to a Business account
- In the Instagram app: Settings → Account type and tools → Switch to professional account.
- Pick Business. (Creator accounts exist too, but Business is the type every posting API supports without caveats.)
- Choose a category — it's cosmetic and can be hidden from your profile.
The switch is free, takes a minute, and is reversible. You also get profile analytics and a contact button thrown in.
Step 2: link a Facebook Page
- No Page yet? Create one at facebook.com/pages/create — a bare Page with just a name is enough.
- In Instagram: Edit profile → Page (or Settings → Business tools and controls), then connect the Page. Alternatively link it from the Facebook side in the Page's settings under Linked accounts.
- Make sure the Facebook account you'll sign in with is an admin of that Page.
This is the step most connection failures trace back to — an Instagram linked to the wrong Page, or to no Page at all. If a connection fails, check the link in Meta's Accounts Center first.
Step 3: connect the tool
In SOSPosting, open Integrations → Instagram and sign in with Facebook. Grant the requested Page and Instagram permissions, pick your Page, and the linked Instagram Business account is detected automatically. Tokens refresh themselves after that — you won't be re-prompted weekly.
What you can publish once connected
- Photo posts — image, caption and hashtags published directly, no taps in the app.
- Reels — vertical video; Meta transcodes it (a few minutes for heavy files) and the Reel goes live with the caption included.
In SOSPosting the caption and hashtags are written by AI per platform — an Instagram-native caption, not a copy of your TikTok text. Both post types can be scheduled up to 60 days ahead.
The limits nobody mentions
- 25 API posts per rolling 24 hours — Meta's cap per Instagram account. Irrelevant for normal use, worth knowing if you bulk-schedule.
- Stories and carousels aren't part of SOSPosting's flow — it publishes photo posts and Reels, which is where feed reach lives.
- Media comes from a URL: Meta fetches your image/video from the tool's storage rather than accepting raw bytes — handled for you, but it's why some DIY scripts fail.
Set up once, publish everywhere
The ten-minute setup pays off beyond Instagram: the same SOSPosting upload can go to TikTok, YouTube Shorts, Facebook and Threads in one publish — up to 5 networks for a single video — see posting to Instagram and TikTok at the same time, or the Instagram integration page for the short version of these steps.