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

Description

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

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