Give your AI agent buying power. Your Robinhood stocks back a USDG credit line on Robinhood Chain that an AI agent can trade 24/7, under a mandate the contract enforces. Your stocks stay put, i.e., the broker signs an attestation of your holdings (shares on Robinhood). That sets an on-chain credit limit. Nothing is moved or sold.
AI agents can trade for you, but today they can only spend cash you move to them, and broker margin can't be handed to an agent under limits it can't break. Hapax is the missing credit layer.
Your broker signs an attestation of the shares you hold (EIP-712). That sets an onchain credit limit; your stocks never move. You borrow USDG into a credit account that only you control, then hire an AI agent with a mandate: which stocks it may buy, how large each position can get, and when its rights expire. The agent can trade and repay but can never borrow, withdraw, or send funds anywhere except approved venues. Anything outside the mandate reverts onchain.
Because borrowed USDG can never leave the account, your collateral only has to cover what the positions could lose, not the full loan. The same $400k brokerage account supports about $700k of agent buying power, against $175k of conventional cash-out credit.
Stock markets close on Friday; tokenized stocks on Robinhood Chain trade all weekend. Hapax's session-aware risk engine reprices positions from the live onchain market when the exchange is closed, blocks new risk as losses grow, lets anyone trigger an automatic sell-off when limits are breached, and freezes the account in the same block if the broker withdraws its attestation. If a shortfall remains, the broker settles from the pledged shares, so lenders are repaid.
Users can withdraw profits at any time, repay from their wallet, or close out in one transaction. All contracts are deployed and verified on Robinhood Chain testnet. The testnet deployment uses mock stock tokens and USDG, and the brokerage is simulated.