SENTR, $SENTR, is a token on Robinhood Chain launched through Pons, attached to a wallet guardian that watches any public address on Robinhood Chain, Ethereum and Base for new approvals, outgoing funds, lookalike dust and contact with listed scam addresses. Every alert carries the transaction link and a fix built in the browser: a revoke of the risky approval, a panic plan that revokes every permission it finds and moves standard tokens to an address you control with native coin last, a one-time stealth destination sealed in an encrypted browser vault, a burner wallet for risky clicks, and a Safe send check that blocks a recipient whose ends match but whose middle does not. Every main-wallet step is shown in full and signed in your own wallet. Counterparties are checked against the ScamSniffer scam database and sites against the MetaMask phishing list. Gas for the fix is being built with Pimlico as one sponsored EIP-7702 batch, and alerts are being built to reach your wallet inbox through XMTP. Both are coded and tested, and switch on once their production keys are live. SENTR never asks for your main key and holds no custody, and holding the token is not needed to use it. SENTR tells you what changed and hands you the fix. It never signs for you.