A Funded Key Is Not a Budget. We Proved It on Arc Mainnet

This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.

x402 lets an AI agent pay for things in USDC. That part works. The part nobody ships is the one that matters to whoever holds the keys: if the agent holds a funded key, the only thing standing between your balance and a bad prompt, a bug or a compromised model is the agent itself. A funded key is n…