Generate & Publish Social Media Content with Gemini, Kie.ai, and Late API

📘 Overview

This workflow automates end-to-end social media publishing powered by Late API.
It generates text content with Google Gemini , creates branded visuals with Kie.ai , uploads media to Late , and publishes across multiple platforms (Facebook, Instagram, LinkedIn, TikTok).

It’s a production-ready automation for marketing teams who want to save hours of work by letting AI handle both copywriting and design — all inside n8n.

⚙️ How it works

1. Generate text content → Google Gemini produces platform-optimized copy (tone & length adapted to each network).
2. Generate visuals → Kie.ai Seedream v4 creates branded 1080x1080 images.
3. Upload to Late → media is stored using Late’s upload API (small & large file handling).
4. Publish → posts are created via Late API on enabled platforms with correct { platform, accountId } mapping.
5. Notify → success logs are sent via Slack, Discord, Email, and Webhook.

🛠 Setup Steps

• Time to setup: ~10–15 minutes
• Steps:
  1. Add your API keys in n8n Credentials:
     • Google Gemini API (PaLM)
     • Kie.ai (Seedream)
     • Late API
  2. Insert your Account IDs (Facebook, Instagram, LinkedIn, TikTok) into the Default Settings node.
  3. Choose which platforms to enable (ENABLE_FACEBOOK, ENABLE_INSTAGRAM, etc.).
  4. Set your Business Type and Content Topic (e.g., “a tech company” / “new product launch”).
  5. Execute the workflow.

📝 Notes

• Sticky Notes are included in the workflow to guide each section: Overview, Prerequisites, Default Settings, Content Generation, Image Generation, Media Upload, Publishing Logic, Notifications, Error Handling.
• All API keys are handled via Credentials (no hardcoding).
• Fallback content is included in case Gemini fails to parse.
• Large image files (>4MB) are handled with Late’s multipart upload flow.

💸 Cost per Flow (Estimated)

• Late API : $0.00 within Free/Unlimited plans, or ≈ $0.11/post on Build plan ($13/120 posts).
• Google Gemini : ~$0.0001–$0.0004 per post (≈200 tokens in/out).
• Kie.ai (Seedream): ≈ $0.01–$0.02 per generated image.

➡️ Total: ~$0.01 – $0.12 per post , depending mainly on your Late plan & Kie.ai credits.

🎯 Use cases

• Marketing teams automating cross-platform campaigns.
• Solo founders posting content daily without design/copy effort.
• Agencies scaling social media management with AI + automation.

📢 Credits

• Built by Adrian (RoboMarketing) for the n8n Arena Challenge – September 2025.
• Powered by:
  • Gemini API
  • Kie.ai Seedream
  • Late API