How to schedule a TikTok photo slideshow by API using public image URLs

Send a server-side POST /api/v1/publish request with type: slideshow, a TikTok target, public imageUrls and a future ISO scheduledAt. MultiPost re-hosts external images on its verified media domain and stores the prepared job until its publish time.

A slideshow accepts up to 20 image URLs. Keep their array order deliberate, use assets your product is allowed to distribute and validate that every URL remains reachable while MultiPost prepares the request.

The fast way is to have the user connect TikTok in MultiPost, generate a personal API token and let your backend call GET /api/v1/accounts. Use the returned handle when the user has more than one TikTok account so the job reaches the intended profile.

Partner API publishing and scheduling require Pro or Agency. Check GET /api/v1/me and link to MultiPost plans when the user cannot publish or has no remaining sends.

It should validate a non-empty image array, no more than 20 items, a supported platform, an exact account handle when needed and a future ISO time. Also validate caption facts and image rights in your own product; MultiPost can transport media but cannot approve its claims.

The existing workflow for one product carousel across Instagram, TikTok and Facebook is a useful editorial checklist even when your source is an API.

Fetch current accounts immediately before target selection and save both platform and handle in the user's configuration. Do not assume the first TikTok connection is the correct one when several profiles are present.

Ask the user to confirm the displayed identity, and follow the account switching checks in the guide to managing multiple TikTok accounts safely.

Your SaaS should inspect the HTTP response and every target result, store the returned scheduled identifier and show the selected account and time back to the user. A successful request means MultiPost accepted the job; your product should still surface later operational failures instead of treating submission as guaranteed network publication.