Self-Improving TikTok Carousel Agent (n8n) w/ Gemini, fal.ai, OpenAI + Sheets

Turn TikTok insights into a new carousel every day—automatically

This Self-Improving TikTok Carousel Agent (n8n) workflow refreshes your TikTok analytics in Google Sheets, generates a fresh 4-slide TikTok carousel strategy with Google Gemini, creates the slide images with fal.ai, writes a caption with OpenAI, and publishes via Upload-Post**—then updates its own “Agent Skill” for smarter results next run.

What this workflow does

• Runs daily (or on demand) to keep your content pipeline current.
• Reads prior performance from a Google Sheet “Performance Log”.
• Fetches TikTok post analytics from the Upload-Post API and writes views/likes/comments/shares and engagement rate back to Sheets.
• Pulls TikTok profile analytics from Upload-Post and combines them with the sheet’s stored “Agent Skill” memory into a single context summary.
• Uses Google Gemini to generate a structured plan: a hook/title, four slide image prompts, hashtags, and an engagement question.
• Calls fal.ai to render four 9:16 carousel slide images from those prompts and collects the image URLs.
• Uses OpenAI to write a short TikTok photo description/caption.
• Publishes the carousel to TikTok via Upload-Post, then appends the new post details to the Performance Log.
• Rewrites and saves updated “Agent Skill” in Google Sheets based on cumulative results for next time.

Use cases

• Keep a consistent TikTok posting schedule with automated carousel creation and performance tracking.
• Content teams that want Gemini + OpenAI ideation while relying on real post analytics to iterate.
• SaaS operators running lightweight growth experiments—test hooks, visuals, and captions without manual reporting.

Technical details (n8n + integrations)

• Google Sheets: “Performance Log” + persisted “Agent Skill” memory.
• Upload-Post API: retrieves TikTok analytics and publishes carousel posts.
• Google Gemini: generates the carousel plan (hook/title, 4 prompts, hashtags, question).
• fal.ai: generates four 9:16 slide images per carousel.
• OpenAI: writes the TikTok caption/description and updates the “Agent Skill” text.
• n8n nodes include: set, code, merge, split out, aggregate, plus sticky note for workflow readability.