Monitor high-value USDT transfers on Ethereum with Airtable and Slack alerts
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This workflow has 8 nodes and runs on a schedule (every day at 10:00). Along the way it connects Airtable and Slack. It also calls eth-mainnet.g.alchemy.com over HTTP.
How it runs
Trigger: On a schedule (every day at 10:00).
- Get latest blocknumber (HTTP Request): calls eth-mainnet.g.alchemy.com (POST)
- Fetch USDT transaction logs (HTTP Request): calls eth-mainnet.g.alchemy.com (POST)
- Extract transactions details (Code): runs custom JavaScript code
- Filter high value transaction (If): checks a condition and branches into true / false
- Save transaction (Airtable): create
- Genrate transction summary (Code): runs custom JavaScript code
- Send transaction alert (Slack): uses Slack
Services it uses
HTTP calls to: eth-mainnet.g.alchemy.com
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (6)
- Schedule Trigger
n8n-nodes-base.scheduleTrigger - HTTP Request
n8n-nodes-base.httpRequest - Code
n8n-nodes-base.code - If
n8n-nodes-base.if - Airtable
n8n-nodes-base.airtable - Slack
n8n-nodes-base.slack
From the author
Smart Contract Event Monitor (Web3) This workflow automatically monitors the Ethereum blockchain, extracts USDT transfer events, filters large-value transactions, stores them in Airtable and sends a clean daily summary alert to Slack. This workflow checks the…