Approval Spender Reputation Checker

WHAT IT DOES

Approval Spender Reputation Checker reads approval transaction data from your wallet or a transaction hash, extracts the spender address, and checks its reputation against a database of known safe and malicious addresses. It displays a clear reputation badge (Safe, Suspicious, Malicious, or Unknown) and provides a plain-language assessment of the spender's trustworthiness. The tool helps you identify whether you are approving a legitimate, known service or a potentially malicious address.

HOW TO USE

When your wallet prompts you to sign an approval transaction, copy the transaction hash from your wallet or the requesting dApp. Open the Approval Spender Reputation Checker, connect your EVM wallet, and paste the transaction hash into the input field. Click "Look up transaction" to fetch the approval details and check the spender's reputation. Alternatively, click "Manual entry" to enter the spender address directly. The tool will display the spender address, token contract, function, and a reputation badge with a description. Review the AI explanation to understand the spender's reputation and what risks to consider before approving.

TECHNICAL SECTION — SPENDER REPUTATION LOOKUP

The tool fetches transaction data from the blockchain using the connected wallet's provider. It decodes the function signature and arguments to identify the spender address for approve, setApprovalForAll, and permit calls. The spender address is then checked against a built-in reputation database containing known safe addresses (major protocols, exchanges, and routers) and known malicious addresses. The tool also applies basic heuristics to flag suspicious addresses (e.g., addresses with unusual patterns). The AI layer receives the spender address and reputation data, generating a plain-language assessment of the spender's trustworthiness. This approach helps you make informed decisions before granting token approvals.

WHAT IT CANNOT SEE

This tool cannot determine if a spender address is malicious without an external reputation database. It cannot detect newly created malicious addresses that have no transaction history. It cannot read the actual intent behind a spender's use of the approval. It cannot predict if a previously safe spender will become malicious. It cannot verify if the spender is impersonating a legitimate address. The user must still verify the transaction details in their wallet before signing. The AI explanation is generated from the reputation data and does not constitute financial advice or a security guarantee.

PLEASE NOTE

EVM chains only. Reputation assessments are AI-generated from the data the app reads—always review what you are actually signing in your wallet before approving it. The wallet's own signature prompt remains the final and only protection against unwanted approvals. This tool is read-only; it never sends transactions or signs anything on your behalf.