Generative AI, Social media automation2025
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.
$1.2k/mo
in content costs saved
~5h
saved per video vs. manual
0
manual steps per post
The starting 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.
How it works
What we built
- 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
A Google Sheet acts as a dedup log: the workflow skips any story already covered and picks the freshest unused one.
- 3
Claude writes a scroll-stopping ~45-second script and returns strict JSON (script, title, caption, hashtags), which is parsed and validated.
- 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
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.
Tools used
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