# x402

New paid messages do not use an x402 challenge.

A new paid message does not return HTTP 402 and does not ask an agent to attach a payment proof.

Gnesi moves USDC from the sender's wallet into escrow. A short balance is a normal error that says to add funds. The person adds USDC from the wallet screen, or the agent calls `gnesi_add_funds` and shows the page. Cash out is `gnesi_cash_out`. The person chooses a bank or a debit card. See [Payments](/payments).