This article provides a complete, practical walkthrough of the Schedule Http Send Webhook 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:  
   Automated SSL Certificate Expiry Alerts Using n8n and Google Sheets
   
   Meta Description:  
   Learn how to set up a low-code automated SSL certificate monitoring system using n8n, Google Sheets, and SSL-Checker.io. Get weekly alerts before your SSLs expire and avoid costly downtime.
   
   Keywords:  
   SSL monitoring, n8n workflow, SSL certificate, SSL expiry alert, Google Sheets automation, SSL-Checker.io, DevOps automation, IT operations, certificate health check, email alert system
   
   Third-Party APIs Used:
   
   - SSL-Checker.io API — For retrieving SSL certificate details like host, expiration date, and days left.
   - Google Sheets API (via n8n's integration) — To store and update the list of monitored URLs and their SSL certificate details.
   - Gmail API (via n8n's Gmail node) — To automatically send email alerts for upcoming SSL expiries.
   
   Article:
   
   Never Let Your SSL Certificates Expire Again: Automate SSL Monitoring with n8n
   
   For IT operations and DevOps teams, managing SSL certificates is a routine but critical task. An expired SSL certificate not only disrupts secure communication but can also impact SEO rankings, cause customer trust issues, and ultimately affect business continuity. That’s why automating SSL expiry alerts is an effective way to ensure 24/7 wellness of your digital assets.
   
   This article breaks down a no-code/low-code n8n workflow called “SSL Expiry Alert” designed to check the SSL certificate of URLs on a weekly basis, update a central Google Sheet with key certificate information, and send out alert emails when any certificate is close to expiration.
   
   Overview of the Workflow
   
   The “SSL Expiry Alert” workflow is a scheduled automation built with n8n, the open-source workflow automation tool. It integrates with Google Sheets to fetch and update monitored URLs, makes HTTPS requests to SSL-Checker.io to assess certificate validity, and finally, sends out email notifications using Gmail when certificates are due to expire within seven days.
   
   How it Works — A Step-by-Step Breakdown
   
   1. Weekly Trigger  
   This automation begins with a schedule-based trigger. The built-in Schedule node in n8n is configured to run every Monday at 8:00 AM (Asia/Kolkata timezone). This ensures that SSL checks are performed consistently each week without manual intervention.
   
   2. Fetch Monitored URLs  
   The next step accesses a Google Sheets document containing a list of URLs to monitor. A dedicated "Fetch URLs" node pulls data from this sheet. Each URL serves as an input to the SSL check process.
   
   Pro Tip: You can customize or clone the sheet, but make sure the n8n workflow node is updated with the correct document ID and worksheet name/URL.
   
   3. Check SSL Certificate  
   n8n’s HTTP Request node utilizes the SSL-Checker.io API. Each URL (sanitized to remove protocols and trailing slashes) is queried through:
   
   https://ssl-checker.io/api/v1/check/{{ cleaned URL }}
   
   The response from the API includes important data such as:
   
   - Hostname
   - Certificate issuer
   - Validity start and end dates
   - Number of days left until expiry
   
   4. Update the Google Sheet  
   As fresh SSL data is obtained, the same Google Sheet is updated via the "URLs to Monitor" node. Each URL is matched based on the "URL" column, and its associated expiry data is either populated or refreshed. This turns your Google Sheet into a central dashboard of certificate status across your properties.
   
   5. Check for Imminent Expiry  
   An IF condition node acts as a decision controller. It evaluates the "days_left" parameter from the API's SSL result. If the days left are less than or equal to 7, the condition is met and an alert email is triggered.
   
   6. Send Expiry Alert Email  
   For any certificate expiring in 7 days or less, the final node sends an email via Gmail. The email includes the number of days left and the hostname, with a subject line and message body formatted like:
   
   Subject: SSL Expiry - 3 Days Left - example.com  
   Message: SSL Expiry - 3 Days Left - example.com
   
   This ensures relevant stakeholders can act in time to renew expiring certificates.
   
   Use Cases
   
   This workflow is ideal for:
   
   - DevOps teams managing multiple domains and subdomains.
   - Agencies managing client websites with SSL.
   - Systems Administrators overseeing internal and public-facing applications.
   
   Benefits of This Workflow
   
   - Set it and forget it: Weekly automation takes the guesswork out of SSL monitoring.
   - No coding required: All built using n8n’s visual interface — easy to deploy and extend.
   - Centralized dashboard: Google Sheets provide transparency and historical data for auditors or internal compliance use.
   - Avoid downtime: Real-time alerts ensure certificates are renewed before causing disruptions.
   
   Tools and APIs Involved
   
   - n8n: The backbone of the automation.
   - Google Sheets API: Stores and manages the list of monitored URLs and SSL status.
   - SSL-Checker.io API: Fetches SSL certificate details.
   - Gmail API via n8n: Sends email alerts when SSL expirations are imminent.
   
   Conclusion
   
   Keeping your SSL certificates up to date is critical, but it doesn’t have to be a manual chore. With this n8n “SSL Expiry Alert” workflow, you can automate the entire process — from scanning your digital assets, updating their certificate status, and proactively alerting your team to expirations — all in a clean, modular, and scalable way.
   
   Whether you’re new to automation or a seasoned DevOps engineer, this approach saves time and reduces the risk of exposed security gaps. Say goodbye to expiration surprises and say hello to continuous SSL peace of mind.
   
   Ready to get started? Clone the workflow in your n8n instance and let automation handle the vigilance.

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.