“Learn Something Every Day” Automated Subscription Push Service

Workflow Name

“Learn Something Every Day” Automated Subscription Push Service

Key Features and Highlights

This workflow implements a fully automated subscription service where users can subscribe to topics of interest via an online form and select their preferred push frequency (daily, weekly, or random). The system leverages AI to automatically generate relevant factual content along with accompanying illustrations, which are then sent to subscribers via scheduled emails. A streamlined unsubscribe process is also provided to ensure a smooth user experience.

Core Problems Addressed

• Inefficiency and error-proneness in manually managing subscriber information and push content.
• Difficulty in automating content updates with a lack of personalization and novelty.
• Complex unsubscribe procedures that hinder user privacy and security protection.
• Challenges in coordinating scheduled execution and concurrent sending for multiple push frequencies.

Use Cases

• Educational and knowledge-sharing platforms that regularly deliver topic-specific insights to users.
• Content marketing, automating the distribution of interesting facts or product information related to specific themes.
• Community management, enhancing user engagement and retention through personalized content.
• Any service requiring scheduled content delivery based on subscription preferences.

Main Workflow Steps

1. Subscription Process
   Users fill out an n8n form specifying their topics of interest, email address, and push frequency; the data is synchronized to an Airtable database to complete subscription registration.
2. Confirmation Email Dispatch
   The system automatically sends a subscription confirmation email via the Gmail node, informing users of their subscription details.
3. Unsubscribe Process
   Users submit unsubscribe requests through a separate form; the system identifies users by unique IDs and updates their status to “inactive” in Airtable, halting further pushes.
4. Scheduled Trigger
   At 9 AM daily, scheduled trigger nodes query Airtable for active subscribers categorized by daily, weekly, and random frequencies.
5. Content Generation
   Using the Groq language model and LangChain AI agent combined with the Wikipedia tool, the system automatically generates unique factual content aligned with the subscription topics.
6. Illustration Generation
   The OpenAI image generation API creates child-friendly illustrations matching the text content, with image dimensions adjusted accordingly.
7. Email Sending and Log Update
   Text and images are sent to subscribers via Gmail, including an unsubscribe link. After sending, the “Last Sent” field in Airtable is updated to record the push timestamp.
8. Concurrent Execution
   A sub-workflow mechanism enables concurrent processing for multiple subscribers, preventing a single email failure from affecting the overall workflow.

Involved Systems and Services

• n8n Forms (Form Trigger): Front-end interaction for subscription and unsubscription.
• Airtable: Subscriber data storage and status management database.
• Gmail: Sending confirmation and scheduled push emails.
• Groq Chat Model: AI language model for generating factual content on subscription topics.
• LangChain AI Agent: Orchestrates content generation workflows and calls multiple AI tools.
• Wikipedia Tool: Provides factual knowledge sources.
• OpenAI Image Generation API: Creates topic-matched illustrations.
• n8n Executor (Execute Workflow): Supports concurrent sub-workflow processing.

Target Users and Value Proposition

• Content operators and educational institutions seeking to automate knowledge delivery to boost user engagement and loyalty.
• Marketing teams aiming for personalized email campaigns based on user interests.
• Developers and automation enthusiasts who want a ready-made template to quickly build subscription push products.
• UX designers benefiting from a clean subscription and unsubscribe flow design that enhances user satisfaction.

This workflow demonstrates how to leverage n8n’s full-stack automation capabilities combined with AI content generation and multi-system integration to create an efficient, intelligent, and user-friendly knowledge subscription push service. Feel free to copy and customize the workflow to suit your specific needs!