Automated blog creation from news to publication using Gemini, Ideogram & Slack

The AI Blog Creator with Gemini, Replicate Image, Supabase Publishing & Slack is a fully automated content generation and publishing workflow designed for modern marketing and SaaS teams. It automatically fetches the latest industry trends, generates SEO-optimized blogs using AI, creates a relevant featured image, publishes the post to your CMS (e.g., Supabase or custom API), and notifies your team via Slack all on a daily schedule.

This workflow connects multiple services NewsAPI, Google Gemini, Replicate, Supabase, and Slack into one intelligent content pipeline that runs hands-free once set up.

✨ Features

• 📰 Fetch Trending Topics — pulls the latest news or updates from your selected industry (via NewsAPI).
• 🤖 AI Topic Generation — Gemini suggests trending blog topics relevant to AI, SaaS, and Automation.
• 📝 AI Blog Authoring — Gemini then writes a full 1200-1500 word SEO-optimized article in Markdown.
• 🧹 Smart JSON Cleaner — A resilient code node parses Gemini’s output and ensures clean, structured data.
• 🖼️ Auto-Generated Image — Replicate’s Ideogram model creates a blog cover image based on the content prompt.
• 🌐 Automatic Publishing — Posts are automatically published to your Supabase or custom backend.
• 💬 Slack Notification — Notifies your team with blog details and live URL.
• ⏰ Fully Scheduled — Runs automatically every day at your preferred time (default 10 AM IST).

⚙️ Workflow Structure

🔧 Setup Instructions

1. Import the Workflow in n8n and enable it.

2. Create the following credentials:

   • NewsAPI (Query Auth) — from https://newsapi.org
   • Google Gemini (PaLM API) — use your Gemini API key
   • Replicate (Bearer Auth) — API key from https://replicate.com/account
   • Supabase (Header Auth) — endpoint to your /functions/v1/blog-api (set your key in header)
   • Slack API — create a Slack App token with chat:write permission

3. Edit the NewsAPI URL query parameter to match your industry (e.g., q=AI automation SaaS).

4. Update the Supabase publish URL to your project endpoint if needed.

5. Adjust the Slack Channel name under “Slack Notification”.

6. (Optional) Change the Schedule Trigger time as per your timezone.

💡 Notes & Tips

• The Code in JavaScript node is robust against malformed or extra text in Gemini output — it sanitizes Markdown and reconstructs clean JSON safely.
• You can replace Supabase with any CMS or Webhook endpoint by editing the “Publish to Supabase” node.
• The Replicate model used is ideogram-ai/ideogram-v3-turbo — you can swap it with Stable Diffusion or another model for different aesthetics.
• Use the slug field in your blog URLs for SEO-friendly links.
• Test with one manual execution before activating scheduled runs.
• If Slack notification fails, verify the token scopes and channel permissions.

🧩 Tags

#AI #Automation #ContentMarketing #BlogGenerator #n8n #Supabase #Gemini #Replicate #Slack #WorkflowAutomation