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Install MetaMask Flask

Never send crypto to the wrong blockchain

Chain Guardian watches every transaction you make in MetaMask and warns you instantly if the destination address belongs to a different blockchain network.

Live preview — what you see in MetaMask
Wrong network detected

This address appears to be a Solana address. You are currently on Ethereum Mainnet. Sending funds here will result in permanent loss.

7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU
Send via bridge instead
Wormhole
Allbridge
deBridge

When the address is compatible, you will see a green confirmation — safe to proceed.

Three steps, zero configuration

Install once, protected forever. No setup required.

01

Install the Snap

Add Chain Guardian to MetaMask in one click from the official Snaps directory. No accounts, no emails.

02

Send a transaction

Every time you initiate a send in MetaMask, Chain Guardian silently analyzes the destination address.

03

Get warned instantly

If the address format does not match your current network, you see a clear warning before you confirm.

10+ blockchains protected

Chain Guardian detects address mismatches across all major blockchain ecosystems.

Ethereum
Polygon
BNB Chain
Avalanche
Optimism
Arbitrum
Base
Solana
Bitcoin
Tron
XRP
Litecoin
Cardano
Cosmos
Polkadot
Stellar

Start protecting your transactions today

Free, open source, and takes 10 seconds to install. Works automatically on every transaction.

Add to MetaMask — It's free