Autonomous TikTok Video Publisher

Every three days, an n8n workflow turns the latest n8n & AI news into a 45-second talking-avatar video and publishes it to TikTok through the official API — with no human in the loop.

How it works

The problem

Keeping a social channel alive with fresh, on-topic short videos is time-consuming and hard to sustain manually — and brittle UI-automation 'auto-posters' break constantly and risk the account.

The approach

1. 1

   A schedule trigger fires every three days and pulls the latest items from two RSS feeds (the n8n blog and an AI-news source), merged and sorted by date.

2. 2

   A Google Sheet acts as a dedup log: the workflow skips any story already covered and picks the freshest unused one.

3. 3

   Claude writes a scroll-stopping ~45-second script and returns strict JSON (script, title, caption, hashtags), which is parsed and validated.

4. 4

   HeyGen renders a talking-photo avatar video; the workflow polls the render status in a loop until it's complete, then downloads the MP4 and measures its exact byte size.

5. 5

   The video is posted via TikTok's official Content Posting API (init → chunked upload → status), then logged back to the Sheet. A self-referencing error workflow emails any failure.

Highlights

• Runs completely unattended on a 3-day cadence, from news item to published TikTok.
• Publishes through TikTok's official API — no fragile UI automation — with a full Sheet audit log.
• Resilient: render-status polling loop, model retries, and email alerts on any failure.

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