This article provides a complete, practical walkthrough of the Telegram Code Monitor 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:**  
   How to Monitor Your USDT ERC-20 Wallet Balance Using n8n, Etherscan, and Telegram
   
   **Meta Description:**  
   Learn how to automatically monitor changes in your USDT ERC-20 wallet balance using a custom n8n workflow integrated with Etherscan and Telegram for instant notifications.
   
   **Keywords:**  
   USDT wallet tracker, ERC-20 monitoring, Etherscan wallet balance, Telegram crypto alerts, n8n workflow, Ethereum wallet automation, crypto balance notifier, how to use n8n with Etherscan API, Telegram + n8n + Etherscan, cryptocurrency automation
   
   **Third-Party APIs Used:**
   
   1. Etherscan API – to fetch the current USDT token balance from an Ethereum wallet.
   2. Telegram Bot API – to send real-time notifications about balance changes to a specified chat.
   
   ---
   
   **Article:**
   
   # How to Monitor Your USDT ERC-20 Wallet Balance Using n8n, Etherscan, and Telegram
   
   In today’s fast-paced crypto environment, keeping a close eye on your digital assets is more important than ever. Whether you're a retail holder managing a few hundred dollars in Tether (USDT), or a custodian overseeing thousands in stablecoins, knowing when your wallet balance changes can be critically important. 
   
   Thanks to powerful automation tools like n8n, there's a smarter, faster, and more developer-friendly way to stay updated without needing to check blockchain explorers manually. This guide walks you through an n8n workflow that integrates Etherscan and Telegram to notify you of any change in your USDT ERC-20 wallet balance — every five minutes.
   
   ---
   
   ## Introducing the USDT ERC-20 Wallet Balance Tracker Workflow
   
   The workflow is designed to perform the following steps:
   
   1. **Trigger every five minutes**
   2. **Fetch balance from Etherscan using the wallet and token address**
   3. **Check if the balance has changed from the last check**
   4. **Send a Telegram alert if the balance changed or a stability message if it remained the same**
   
   Let’s break down the components to understand how this system operates seamlessly.
   
   ---
   
   ## Setting the Foundation: The Cron Trigger & User Data
   
   The workflow kicks off with a Cron node set to run every 5 minutes. This node triggers the rest of the workflow and ensures routine balance checks.
   
   Following this, the workflow utilizes a “Set” node called `userData` that allows you to input three key parameters:
   
   - Your Ethereum wallet address
   - Your Etherscan API key
   - The contract address of USDT on the Ethereum network (0xdAC17F958D2ee523a2206206994597C13D831ec7)
   
   This modular setup means you can easily modify it in n8n without needing to change lower-level code.
   
   ---
   
   ## Retrieving Your USDT Balance via Etherscan
   
   The core of the workflow is an HTTP Request node that integrates directly with the Etherscan API. It constructs a URL to call the `tokenbalance` endpoint using your wallet address and the USDT contract address.
   
   Here’s what the API fetches:
   
   - The latest balance of USDT in your wallet (in micro-units, because USDT uses 6 decimals)
   
   The balance data is parsed and sent to the next node for comparison.
   
   ---
   
   ## Analyzing Balance Changes
   
   Next, a custom "Code" node kicks in. This JavaScript logic does the following:
   
   - Retrieves stored data (previous balance) from global workflow memory
   - Compares it with the latest balance obtained from Etherscan
   - Sets a flag, `balanceChanged`, to `true` or `false`
   - Saves the new balance into static data for future comparisons
   
   This ensures that even though the workflow runs frequently, it only flags notifications when an actual balance change has occurred.
   
   ---
   
   ## Decision-Making with the IF Node
   
   An “IF” node checks whether the `balanceChanged` flag is `true`. Based on the result, it routes the data to one of two paths:
   
   1. **Balance Changed:** Triggers a Telegram notification with pertinent info including:
      - Wallet address
      - Previous balance
      - Current balance
   
      The values are divided by 1e6 to convert the balance into standard USDT format (since it's returned in micro-units).
   
   2. **Balance Unchanged:** Sends a calmer message to Telegram acknowledging that no changes were detected.
   
   All messages are formatted using Markdown for clarity and are sent directly to your desired Telegram chat using your bot’s API token and your chat ID.
   
   ---
   
   ## Real-Time Alerts on the Go
   
   The integration with Telegram transforms this workflow into a real-time balance monitoring tool you can carry in your pocket. Whether you're waiting for a major transaction or simply want to audit account activity, you'll be immediately informed when changes occur.
   
   Configure this workflow to:
   
   - Watch hot or cold wallets
   - Automate bookkeeping
   - Alert you about unexpected movements
   - Provide peace of mind for stablecoin storage
   
   Bonus: You can extend this setup for other ERC-20 tokens by simply changing the contract address in the `userData` node.
   
   ---
   
   ## Final Thoughts
   
   Using low-code automation tools like n8n opens a world of possibilities for crypto investors, developers, and operations managers. This USDT Wallet Balance Monitor is just the beginning.
   
   With just a few nodes – a trigger, an HTTP request, some JS logic, and a Telegram alert – you've turned a routine manual check into an automated backend script. Combine this with n8n's scalability and extensibility, and you're well on your way to building a personalized crypto monitoring dashboard.
   
   And guess what? You don't even need to be a full-stack developer to make it happen.
   
   ---
   
   🔥 Ready to try it yourself? All you need is:
   - An n8n instance (self-hosted or cloud)
   - An Etherscan API key (free)
   - A Telegram bot & your chat ID  
   Plug-and-play the nodes, monitor your assets, and automate your peace of mind.
   
   —
   
   Want to go further? Try linking this setup with email alerts, Google Sheets for transaction logging, or webhooks that trigger automated trading signals. The possibilities are endless.
   
   Automation meets crypto — welcome to the future of financial 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.