Keeping up with daily AI updates can be a challenge → new models, tools, and breakthroughs appear almost every day. To simplify this process, we built an AI-powered “Newsletter Agent” using n8n, an open-source workflow automation platform. This agent automatically finds trending AI topics, writes educational newsletters using Google Gemini AI, formats the content, and sends it to subscribers → all without manual work.
🌐 The Concept The idea was to automate daily newsletter creation and delivery → so the system itself handles: ◆ Finding a trending AI topic ◆ Writing the newsletter ◆ Formatting and cleaning the text ◆ Fetching email contacts ◆ Sending the email automatically The result? A fully autonomous digital writer and publisher, powered by n8n + Gemini AI. ⚙️ Workflow Overview The entire automation was created inside n8n’s visual editor. Here’s how it works step-by-step: 1. **Schedule Trigger**** → Runs the workflow daily or weekly. **2. AI Topic Selector → Uses Gemini to find a trending AI topic from the last 24–48 hours. 3. AI Newsletter Writer → Generates a complete, structured newsletter. 4. Extract & Format Content → Cleans and converts raw AI output into HTML. 5. Google Sheets → Fetches subscriber email addresses dynamically. 6. Aggregate Node → Combines all emails into a single list. 7. Send AI Newsletter (Gmail) → Sends a well-designed HTML email automatically.
🧠 **AI Topic Selector** This step is powered by Google Gemini. It searches recent AI trends and picks one relevant topic → like “Prompt Engineering Techniques” or “AI Workflow Automation.” A short, structured prompt instructs Gemini to act as a curator, selecting only the most valuable and recent topics. This ensures every newsletter stays fresh, relevant, and industry-aligned. ✍️ **AI Newsletter Writer** Once the topic is selected, another Gemini node writes the newsletter content automatically. It includes: ● Topic introduction ● Why it matters ● Key concepts ● Real-world use cases ● Pro tips and takeaways The AI follows predefined HTML formatting for Cambria font, highlighted sections, and clean headings → ready for email delivery. 💻 **Content Formatting & Cleanup** The AI’s raw output often contains structured data or unwanted escape characters. A Code node (JavaScript) was added to: ➥ Extract clean HTML ➥ Remove metadata or formatting errors ➥ Trim unnecessary text This ensures that the final newsletter looks professional when rendered inside an email. 📋 Fetching Subscribers via Google Sheets Instead of static emails, the agent pulls recipient data directly from a connected Google Sheet. Anyone can add or update email addresses without opening n8n. This simple integration makes the workflow scalable and easy to maintain → perfect for teams or communities. 📦 Data Aggregation Before sending, the Aggregate node compiles all emails into a single clean string. This avoids duplication and ensures a smooth send process. It’s a small but essential step that keeps data management organized inside n8n. 📨 Sending the Newsletter The final email is sent automatically using Gmail integration inside n8n. The email design includes: ● Gradient header (AI Deep Dive) ● Topic badge ● White content section with readable text ● Footer with tagline It’s a simple, elegant layout optimized for readability and consistency.
🚀 Why This Workflow Matters The “Newsletter Agent” combines the creative power of AI with the automation strength of n8n, offering: ◆ Zero manual effort → everything runs on schedule. ◆ Dynamic content → real-time AI-generated insights. ◆ Smart email management → integrates seamlessly with Google Sheets. ◆ Scalable setup → ideal for teams or tech newsletters. This setup shows how AI and workflow automation can handle content creation reliably at scale. 🎓 Best Practices 💡 Use structured prompts for predictable AI outputs. 💡 Keep formatting consistent using HTML and CSS inside n8n. 💡 Regularly test AI responses for accuracy and tone. 💡 Maintain your subscriber list directly from Google Sheets. 💡 Review the first few outputs manually before full automation. ⚠️ Common Mistakes ❌ Using unstructured prompts can lead to messy or irrelevant newsletters. ❌ Ignoring HTML cleanup may cause broken email layouts. ❌ Forgetting to update the email list can reduce deliverability. 🔮 What’s Next The next evolution of this workflow could include: ◆ Auto-posting newsletters on LinkedIn or Medium using n8n integrations. ◆ Summarizing newsletters into social media snippets. ◆ Adding analytics to track open rates and engagement. Automation like this paves the way for intelligent, continuous content delivery → letting teams focus on creativity, not logistics. 🎯 Key Takeaways ✅ AI + n8n = Content Automation ✅ Gemini generates meaningful newsletters daily. ✅ Google Sheets keeps subscriber management simple ✅ Gmail ensures smooth, branded delivery
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