One-time free developer setup. Do each step once, paste the keys into Settings, and then you can connect all 80 of your accounts (20 topics × 4 platforms).
Uploads consume API quota (default 10,000 units/day). Google may need to verify the app for public use.
pages_manage_posts, pages_read_engagement, pages_show_list, instagram_basic, instagram_content_publish, business_management.http://127.0.0.1:57891/callback (…57892–57895 as spares).Instagram Reels publishing requires a publicly reachable video URL — Instagram does not accept direct file uploads. Your Instagram account must be a business/creator account linked to the Facebook Page.
user.info.profile, video.upload, video.publish.http://127.0.0.1:57891/callback (…57892–57895 as spares).Posting in production needs an approved TikTok app — sandbox apps are limited. See docs/API-SETUP.md.