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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
| Step | Node | Purpose |
|---|---|---|
| 1 | Schedule Trigger | Runs daily at 10 AM |
| 2 | Fetch Industry Trends (NewsAPI) | Retrieves trending articles |
| 3 | Message a model (Gemini) | Generates trending topic ideas |
| 4 | Message a model1 (Gemini) | Writes full SEO blog content |
| 5 | Code in JavaScript | Cleans, validates, and normalizes Gemini output |
| 6 | HTTP Request (Replicate) | Generates an image using Ideogram |
| 7 | HTTP Request1 | Retrieves generated image URL |
| 8 | Wait + If | Polls until image generation succeeds |
| 9 | Edit Fields | Assembles blog fields into final JSON |
| 10 | Publish to Supabase | Posts to your CMS |
| 11 | Slack Notification | Sends message to your Slack channel |
🔧 Setup Instructions
-
Import the Workflow in n8n and enable it.
-
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:writepermission
-
Edit the NewsAPI URL query parameter to match your industry (e.g.,
q=AI automation SaaS). -
Update the Supabase publish URL to your project endpoint if needed.
-
Adjust the Slack Channel name under “Slack Notification”.
-
(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
slugfield 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