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This automated n8n workflow monitors API uptime by periodically checking API availability and sending instant WhatsApp alerts if any service goes down. It retrieves API details from a Google Sheet and includes retry logic for failed requests.
Good to Know
- Checks API status every 15 minutes
- Integrates with Google Sheets for API list management
- Implements a retry mechanism with up to 4 attempts
- Sends WhatsApp alerts for downtime
- Supports customizable API request configurations
How It Works
- Schedule Trigger - Triggers every 15 minutes
- Read API List - Fetches all API URLs from a Google Sheet
- Process Each API1 - Loops through each API entry
- Init Retry Counter - Initializes
retryCount = 0 - Test API - Sends the first request to the API
- Check Response - Checks if a valid response was received
- If No Response - Branches into retry flow if down
- Wait 10 Min → Increment Retry → Retry API → Check Retry Response - Wait and retry API call once
- If Still No Response - Verifies if retry also failed
- If Still No Retry > 4 - Checks if retry limit is reached (≥ 4)
- Format Down Alert - Formats the WhatsApp alert with API details
- Send WhatsApp Alert - Sends API down alert to the configured number
- Continue Next API - Moves to the next API in the list
How to Use
- Import workflow into n8n
- Configure Google Sheets API for API list access
- Set up WhatsApp API for alerts
- Define API details in Google Sheet
- Test with sample APIs and verify alerts
- Adjust retry limits or schedule as needed
Requirements
- Access to Google Sheets API
- WhatsApp API configuration
- Scheduled trigger setup in n8n
Sheet Structure
| Sheet Column | Example Data |
|---|---|
name |
Timeout Test |
method |
GET |
url |
https://httpbin.org/delay/15 |
headers |
{"Content-Type": "application/json"} |
body |
{"key": "value"} |
expectedField |
status |
expectedValue |
success |
expectedStatusCode |
200 |
Customizing This Workflow
- Modify trigger interval
- Adjust retry limits or wait times
- Customize WhatsApp alert format
- Add additional API headers or body data
- Integrate with other notification services