Website downtime alert via LINE + Supabase log

This workflow automatically checks the status of your websites using UptimeRobot API. If any site is down or unstable, it will: - Generate a natural-language alert message using GPT-4o - Push the message to a LINE group (with funny IT-style encouragement) - Log all DOWN status entries into your Supabase database - Wait 30 minutes before repeating

🔧 How It Works 1. Schedule Trigger – Runs on a fixed interval (every few minutes). 2. UptimeRobot Node – Fetches website monitor data. 3. Code Node (Filter) – Filters only websites with status 8 (may be down) or 9 (down). 4. IF Node – If any site is down, proceed. 5. LangChain LLM Node – Formats alert with a humorous message using GPT-4o. 6. Line Notify (HTTP Request) – Sends the alert to your LINE group. 7. Loop Over Items – Loops through all monitors. 8. Filter Down (Status = 9) – Selects only “fully down” sites. 9. Supabase Node – Logs these into synlorauptimedown table. 10. Wait Node – Delays next alert by 30 minutes to avoid spamming.

⚙️ Setup Steps

Required: - 🔗 UptimeRobot API Key - 📲 LINE Channel Access Token and Group ID - 🧠 OpenAI Key (GPT-4o Mini) - 🗃️ Supabase Project & Table

Step-by-step: 1. Go to UptimeRobot → Get API key and ensure monitors are set up. 2. Create a Supabase table with fields: website, status, uptimeid. 3. Create a LINE Messaging API bot, join it to your group, and get: 1. Access Token 2. Group ID (userId or groupId) 4. Add your OpenAI API Key for GPT-4o Mini (or switch to your preferred LLM). 5. Import the workflow JSON into n8n. 6. Set credentials in all necessary nodes. 7. Activate the workflow.