This article provides a complete, practical walkthrough of the Code Schedule Send Scheduled n8n agent. It connects HTTP Request, Webhook across approximately 1 node(s). Expect a Intermediate setup in 15-45 minutes. One‑time purchase: €29.

What This Agent Does

This agent orchestrates a reliable automation between HTTP Request, Webhook, handling triggers, data enrichment, and delivery with guardrails for errors and rate limits.

It streamlines multi‑step processes that would otherwise require manual exports, spreadsheet cleanup, and repeated API requests. By centralizing logic in n8n, it reduces context switching, lowers error rates, and ensures consistent results across teams.

Typical outcomes include faster lead handoffs, automated notifications, accurate data synchronization, and better visibility via execution logs and optional Slack/Email alerts.

How It Works

The workflow uses standard n8n building blocks like Webhook or Schedule triggers, HTTP Request for API calls, and control nodes (IF, Merge, Set) to validate inputs, branch on conditions, and format outputs. Retries and timeouts improve resilience, while credentials keep secrets safe.

Third‑Party Integrations

• HTTP Request
• Webhook

Import and Use in n8n

1. Open n8n and create a new workflow or collection.
2. Choose Import from File or Paste JSON.
3. Paste the JSON below, then click Import.
4. Show n8n JSON

   Title:
   Create a Fully Automated Fact Delivery Subscription Service with n8n, AI, and Airtable
   
   Meta Description:
   Build a fully automated "Learn Something Every Day" service using n8n, Airtable, and AI integrations to send daily, weekly, or surprise factoid emails with images. No coding required!
   
   Keywords:
   n8n workflow, Airtable, automated email service, AI content creation, daily fact emails, email automation, OpenAI, Groq API, subscription form, unsubscribe form, language model, no-code automation, LangChain, LLM, AI newsletters
   
   —
   
   Article:
   
   Build a Subscriber-Based Fact Delivery Service with n8n, Airtable, and AI
   
   Do you want to build your own educational email service that sends engaging factoids tailored to users’ interests—with no code? This guide will walk you through a powerful n8n workflow that does just that. Using forms for user signup and unsubscribe flows, Airtable for storage, and AI tools for content generation, this setup automates personalized fact delivery via email on a daily, weekly, or “surprise me” schedule.
   
   Let’s dive into how this smart and scalable workflow functions—and how you can get started building your own!
   
   🛠️ What This Workflow Does
   
   This n8n-based workflow powers "Learn Something Every Day!", a free micro-learning content service delivered via email. Here's what it enables:
   
   - Subscribers sign up to receive daily, weekly, or surprise factoids on a topic of their choice.
   - Scheduled checks each morning determine who should receive an email.
   - AI agents generate unique content and an illustrated image based on each user’s topic.
   - Emails are sent with unsubscribe links.
   - Users may unsubscribe via a form.
   - All events update an Airtable database for easy tracking and user management.
   
   Let's break down the key components.
   
   1. 📝 Subscriber Onboarding
   
   Using the built-in n8n Form Trigger node, users input:
   
   - Their email
   - A topic of interest
   - Preferred delivery schedule: daily, weekly, or “surprise me”
   
   On submission, the workflow saves subscriber details to Airtable, setting their status to “active.”
   
   2. ✅ Confirmation Email
   
   Immediately after subscribing, the user receives a confirmation email. It uses variables to personalize the message with the user’s chosen topic and frequency.
   
   3. 📅 Scheduled Content Delivery
   
   Every day at 9:00 AM, a Schedule Trigger node initiates the workflow that handles content generation and delivery.
   
   It does this by:
   
   - Querying Airtable for active users with matching frequency types (daily, weekly, or surprise).
   - Weekly deliveries ensure at least seven days have passed since the last email.
   - Surprise deliveries randomly select ~10% (1 in 10 chance) to receive content on any given day.
   
   4. 🤖 AI-Generated Factoids and Images
   
   Each selected subscriber triggers a subworkflow that:
   
   - Generates a unique factoid using an AI agent powered by Groq and LangChain.
   - Uses OpenAI’s API to generate an illustrated image related to the factoid.
   - Optimizes the image to the right size and resolution for email display.
   
   This simultaneously ensures:
   - The content is fresh and topic-specific.
   - Each user gets a visually engaging learning experience.
   
   5. 📧 Send Email
   
   Emails are built dynamically with HTML formatting. Each includes:
   
   - The generated factoid text
   - Child-friendly image illustration
   - An unsubscribe link unique to the user’s ID
   
   Recipient details are securely stored in n8n Memory Buffers and Airtable, ensuring future messages can be personalized and scheduled appropriately.
   
   6. 🛑 Unsubscribe Flow
   
   Users can unsubscribe via another n8n form. Instead of using email (which could be misused), it relies on a unique user ID, protecting privacy and ensuring form integrity.
   
   On submission, the related Airtable record is updated to "inactive", which prevents future email sends.
   
   7. 🗂️ Airtable Logging & Tracking
   
   Every send action updates the "Last Sent" timestamp in Airtable. This enables:
   
   - Throttling weekly sends
   - Logging deliveries
   - System audits or future enhancements like analytics
   
   📚 Third-Party Services and APIs Used
   
   This robust but intuitive solution uses the following external integrations:
   
   1. Airtable – For user data storage and scheduling logic
   2. Gmail – To send confirmation and content emails
   3. Groq API – As the language model for AI-generated factoids via LangChain
   4. OpenAI API – For illustrative image generation via its image endpoint
   5. Wikipedia – Used as a research tool via LangChain for more accurate factoids
   
   👨‍🔧 Customizations You Can Add
   
   Want to take it further?
   
   - Add personalized greetings and content history.
   - Let users choose multiple topics.
   - Use AI to summarize trends or send quizzes.
   - Incorporate analytics dashboards with tools like Data Studio or Retool.
   
   💡 Getting Started
   
   To launch your own factoid delivery service:
   
   1. Clone the provided Airtable template.
   2. Add your Airtable API credentials to n8n.
   3. Activate the workflow in n8n Cloud or locally.
   4. Customize the email design and tweak the AI prompts.
   5. Share the subscription form link with your community!
   
   🔗 Resources
   
   - n8n Cloud: https://n8n.io
   - Airtable Template: [sample Airtable link](https://airtable.com/appL3dptT6ZTSzY9v/shrLukHafy5bwDRfD)
   - LangChain documentation: https://docs.langchain.com
   - Groq API: https://www.groq.com
   - OpenAI: https://openai.com
   
   —
   
   This workflow is a perfect example of how automation and AI can work together seamlessly. Whether for education, marketing, or engaging newsletters, you now have a template to deliver dynamic content regularly with minimal intervention.
   
   And best of all? It’s all built in n8n—no code required.
   
   Happy building! 😊
   
   —
   
   Need help? 
   👉 Join the n8n Discord: https://discord.gg/XPKeKXeB7d 
   👉 Ask questions in the Forum: https://community.n8n.io/

5. Set credentials for each API node (keys, OAuth) in Credentials.
6. Run a test via Execute Workflow. Inspect Run Data, then adjust parameters.
7. Enable the workflow to run on schedule, webhook, or triggers as configured.

Tips: keep secrets in credentials, add retries and timeouts on HTTP nodes, implement error notifications, and paginate large API fetches.

Validation: use IF/Code nodes to sanitize inputs and guard against empty payloads.

Why Automate This with AI Agents

AI‑assisted automations offload repetitive, error‑prone tasks to a predictable workflow. Instead of manual copy‑paste and ad‑hoc scripts, your team gets a governed pipeline with versioned state, auditability, and observable runs.

n8n’s node graph makes data flow transparent while AI‑powered enrichment (classification, extraction, summarization) boosts throughput and consistency. Teams reclaim time, reduce operational costs, and standardize best practices without sacrificing flexibility.

Compared to one‑off integrations, an AI agent is easier to extend: swap APIs, add filters, or bolt on notifications without rewriting everything. You get reliability, control, and a faster path from idea to production.

Best Practices

• Credentials: restrict scopes and rotate tokens regularly.
• Resilience: configure retries, timeouts, and backoff for API nodes.
• Data Quality: validate inputs; normalize fields early to reduce downstream branching.
• Performance: batch records and paginate for large datasets.
• Observability: add failure alerts (Email/Slack) and persistent logs for auditing.
• Security: avoid sensitive data in logs; use environment variables and n8n credentials.

FAQs

Can I swap integrations later? Yes. Replace or add nodes and re‑map fields without rebuilding the whole flow.

How do I monitor failures? Use Execution logs and add notifications on the Error Trigger path.

Does it scale? Use queues, batching, and sub‑workflows to split responsibilities and control load.

Is my data safe? Keep secrets in Credentials, restrict token scopes, and review access logs.