ETH WATCHER

ETH WATCHER is currently in its beta testing phase and will continue to receive further improvements. To participate, users need to „Mint Access NFT“. Feedback is highly welcome and can be sent to support@chain-horizon.com to help us improve the platform. All 2026 license NFTs minted during the beta testing phase will remain valid throughout 2026.

Non-custodial • Monitoring & Alerting • Security Checks • NFT-Gated Access

Monitor Ethereum addresses in real time – portfolio visibility, activity tracking on wallets and smart contracts, monitoring & alerting, revocations, security checks, and security-focused alerts. Built for users who want control without exposing their vault wallet.

Connect Wallet Mint Access NFT
Access is verified on-chain via an official Chain Horizon access NFT for authentication. No passwords, PINs or other authentication hurdles.

What is ETH Watcher?

ETH Watcher is a non-custodial Ethereum monitoring and security dashboard. It helps you track selected addresses — balances, tokens, NFTs, and transactions — and receive alerts for important on-chain activity.

  • Monitor multiple Ethereum addresses
  • Track ETH, ERC-20 tokens, ERC-721 & ERC-1155 NFTs
  • Review transactions, transfers, and address activity
  • Security-focused visibility (approvals & risky allowances)
  • Alerts for incoming/outgoing activity

Why you need it

Most tools push you to connect the wallet that holds your funds and other valuable crypto assets (e.g. NFTs). ETH Watcher is designed to mitigate that risk drastically.

Security-by-Design: ETH Watcher does not custody funds, does not request private keys, and does not require transaction signing for monitoring.

Your assets remain in your wallet — ETH Watcher simply helps you see what happens, faster and more secure.

The Double Wallet Security Model

ETH Watcher follows a professional security approach: use one wallet for accessing the monitoring of wallets and separately another wallet as your vault for your valuable crypto assets.

1) Access Wallet (Login Wallet)

  • Holds the Access NFT for authentication
  • Used to connect and authenticate
  • Should not hold significant funds
  • Secure for frequent connections

2) Vault Wallet (Funds Wallet)

  • Holds ETH, tokens, NFTs
  • Never connected to ETH Watcher
  • Added only as a monitoring-only address (watch-only)
  • No signing. No approvals. No interaction.
Even if your access wallet is compromised, your vault remains protected because it was never connected to a wallet app for watch purposes. This is a drastic reduction of the attack surface.

Authentication via NFT

ETH Watcher is protected by NFT-based authentication for access control, leveraging Chain Horizon’s concept of Non-Fungible Entitlement Tokens (NETs). To use the ETH Watcher platform, your connected wallet must hold an official Chain Horizon ETH Watcher license NFT.

Why NFT authentication?

  • No email/password accounts
  • On-chain verification (transparent access rules)
  • Permissionless ownership-based access
  • Tiered access possible (if enabled)

Minting happens on Ethereum Mainnet via a secure Chain Horizon minting page. After minting, connect the wallet holding the NFT with ETH Watcher.

Mint Access NFT

Available license NFTs

Standard

Allows to monitor your two favourite Ethereum addresses (wallet/smart contract) and to check activities (transactions, internal transactions, Token transfers (ERC-20), NFT transfers ERC-721, NFT transfers ERC-1155).

Pro

Allows to monitor up to 5 Ethereum addresses (wallets/smart contracts) with up to 2 alert email recipients for each address with scam warning function, and to check activities (transactions, internal transactions, Token transfers (ERC-20), NFT transfers ERC-721, NFT transfers ERC-1155). Further security features: revocations, email verification, and email breach checks.

Adding and activating your vault wallet in a wallet app is not required when monitoring is performed using ETH Watcher!

Connect Wallet

Connect the wallet that holds your Chain Horizon ETH Watcher license NFT. After verification, you can open and access the dashboard.

Connect wallet

Connect with your Exclusive Chain Horizon NFT