Account permissions come before API keys
Social automation most often gets stuck on account connection and permissions. Before creating an API key, check the status of the Instagram and Threads accounts you plan to connect and the scope of the OAuth consent.
Don't copy one post to every channel
Each platform has different character limits, media rules, and conversation styles. Keeping the shared message but separating copy and media review by channel reduces posting failures and awkward recycled content.
For your first automation, check recovery, not just success
Use a small scheduling test to check not only that posting succeeds but also the failure alerts and retry flow. Scale up to real customer accounts or bulk publishing only after this check.
Official resource: Zernio Agents