Check a transaction before signing.

Paste a Base transaction hash or advanced transaction fields. This page does not connect a wallet, request a signature, or execute a transaction.

Read onlyno signature

Scan Surface

HashReady

CalldataDecode

Transaction FirewallRead only

SignatureNot requested

WalletNot connected

NetworkBase

Controls

ApprovalsScan

PermissionsScan

SimulationOn

Quick check

Easiest path: paste a Base transaction hash from BaseScan, your wallet, or the app. The agent reads the destination, calldata, sender, and value automatically.

Advanced calldata input

What to enter

Transaction hash: the easiest option if you have it from BaseScan or a wallet.
Destination contract: the transaction to field.
Calldata: the transaction data field beginning with 0x.
From: your wallet address, recommended for simulation.

What the agent checks

whether calldata is valid
whether the contract exists on the selected network
whether simulation succeeds or reverts
whether selected security warning signs are present

Important: the result reduces risk, but it is not a guarantee that the contract is safe.